Evaluate the expression when w = 8 and x = 4:9w+5x
Answers
When we need to evaluate an expression with unknown variables we need to use the values provided to us in place of said variables. In this case in the place of "x" we need to use four and in the place of "w" we need to use 8. With this in mind let's solve the problem:
\(\begin{gathered} 9\cdot w+5\cdot x \\ 9\cdot8+5\cdot4 \\ 72+20 \\ 92 \end{gathered}\)The expression is equal to 92 when "x" is equal to 4 and "w" is equal to 8.
Related Questions
The sampling distribution of the ratio of two independent sample variances selected randomly from normal populations with equal variances is:
Answers
Answer: F distribution. chi-square distribution. t distribution. normal distribution.
Step-by-step explanation:
Marking as Brainliest create an x/y chart !
Answers
The tickets for the field trip were purchased yesterday for both students and instructors. Children tickets cost $9, adult tickets cost $11. The number of children tickets purchased was three more than ten times the number of adults tickets purchased. How many of each were purchased if all of the tickets cost a total of $936 dollars?
Answers
The 9 adult tickets and 93 children tickets were purchased.Let's assume the number of adult tickets purchased is "a" and the number of children tickets purchased is "c."
According to the given information, children tickets cost $9 and adult tickets cost $11. So, the total cost of children tickets is 9c, and the total cost of adult tickets is 11a.
The problem also states that the total cost of all the tickets is $936. Therefore, we can write the following equation:
9c + 11a = 936
Additionally, it is mentioned that the number of children tickets purchased was three more than ten times the number of adult tickets purchased:
c = 10a + 3
We can now solve this system of equations to find the values of "a" and "c." By substituting the value of "c" from the second equation into the first equation, we have:
9(10a + 3) + 11a = 936
90a + 27 + 11a = 936
101a = 936 - 27
101a = 909
a = 909 / 101
a = 9
Substituting this value back into the second equation, we find:
c = 10(9) + 3
c = 90 + 3
c = 93.
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-3(5x-9)=??????????????
Answers
Answer:
=−15x+27
Step-by-step explanation:
OK LET ME EXPLAIN :3
First what I would do is -3 x -9 which would be a 27 (Negative x Negative = Positve)
Then I would do 27 x 5 which is 135
Answer: 135
There ya go hope this helped!!
1) A student has a Math placement of Math 111, Math 100 and Math 102+. What course should the student first start with according to their placement results to then continue to get to Math 103E?
Answers
The placement results provided, the student should start with Math 100.
The placement results indicate that the student has placements for Math 111, Math 100, and Math 102+. Math 111 typically corresponds to a higher-level course than Math 100, and Math 102+ implies a placement beyond Math 102.
To progress towards Math 103E, it is essential to follow the recommended course sequence. Usually, Math courses are designed to build upon previously learned concepts and skills. Starting with Math 100 would provide the foundational knowledge necessary to succeed in subsequent courses.
Therefore, the student should first start with Math 100, and upon successful completion, they can proceed to Math 103E. It is important for the student to consult with their academic advisor or the mathematics department at their institution for specific course placement and sequencing information to ensure they are following the appropriate path.
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Can someone tell me what x and y would be
Answers
Step-by-step explanation:
20°+120°+I°=180°
I=40°
using sine rule,
I/sin I=x/sinX
12/sin40=x/sin20
x=12sin20/sin40
x=6.4
using similarly and enlargement,
we have, cw/cp=y/120
8/12=y/120
y=80°
how do we get 24 using 3,3,7 and7
Answers
Answer:
2 Answers. #1. +11. [3+(3/7)] times 7 is 24. DarkBlaze347 May 1, 2015. +5. Good job, DB! civonamzuk May 1, 2015.
35 Online Users.
Step-by-step explanation:
brainliest please and follow:D
3*7=21
21+3=24
Which of the following points lies on the graph of the function y = 4^x
(1,0)
(4,1)
(2,16)
(−1, 0.5)
Answers
Answer:
The answer is (2,16)
Step-by-step explanation:
graphing
Please help must be solved by using substitution
Answers
Answer:
y = -0.1, x = 1.6
Step-by-step explanation:
Substitution is just stating one variable as another.
Lets use the first equation to substitute:
2x - 3 = -2y
2x = -2y - 3
x = -y - 1.5
Now, let's plug this in to the next equation
3x - 12y = -3
We use x as -y - 1.5 instead
3(-y - 1.5) - 12y = -3
-3y - 4.5 - 12y = -3
-15y = 1.5
y = -0.1
If we plug this back into the first equation we get x
2x - 3 = -2(-0.1)
2x - 3 = 0.2
2x = 3.2
x = 1.6
Hope this helped!
2.2.PS-16
Challenge Schools A and B are competing in an academic contest. Correct answers earn 9 points.
Incorrect answers lose 2 points. In the final round, School A gives the same number of correct and
incorrect answers. School B gives no incorrect answers and the same number of correct answers as
School A. School A started the final round with 62 points. School B started with 24. The game ends
with the two schools tied. Let x represent the number of correct answers given by School A in the final
round. Write an equation that models the outcome of the contest. Then find the number of answers
that each school got correct in the final round.
Which equation models the scoring in the final round and the outcome of the contest?
OA. 9x + 2x - 62 = - 9x + 24
OB. 2x-9x + 62 = 9x + 24
OC. 9x - 2x - 62 = 9x + 24
OD. 9x - 2x + 62 = 9x + 24
Answers
Answer:
9x - 2x + 62 = 9x + 24
Number of correct answer each obtained = 19
Step-by-step explanation:
Given that:
Number of correct answers = x
POINTS for correct answers = 9
POINTS for incorrect answers = - 2
SCHOOL A:
Number of correct answers = x
Number of incorrect answers = x
Initial point = 62
Initial point + 9(number of correct answers) + - 2(number of incorrect answers)
62 + 9x - 2x
SCHOOL B :
Number of correct answers = x
Number of incorrect answers = 0
Initial point = 24
Initial point + 9(number of correct answers) + - 2(number of incorrect answers
24 + 9x
Since they end up tied :
School A = School B
62 + 9x - 2x = 24 + 9x
9x - 2x + 62 = 9x + 24
Number of correct answers gotten :
9x - 2x + 62 = 9x + 24
7x + 62 = 9x + 24
7x - 9x = 24 - 62
-2x = - 38
x = 19
Hence, Number of correct answers each obtained = 19
How many times does 60 go into 7043?
Answers
Answer:
Step-by-step explanation:
If you divide 7/8 by 3/4 , Will the the quotient be Greater than or less than 3/4
Answers
Answer:
greater.
Step-by-step explanation:
7/8 divided by 3/4 is equals to 7/6, therefore it is greater than 3/4
Answer:
greater
Step-by-step explanation:
because you have to keep change and flip and you answer would get you 28 over 24 or 1 4/24 hope that helped have a blessed day
What is the value of x?
Answers
Answer:
x = 26
Step-by-step explanation:
the 3 angles lie on the straight line DAC and sum to 180° , that is
4x - 8 + 34 + 76 - x = 180
3x + 102 = 180 ( subtract 102 from both sides )
3x = 78 ( divide both sides by 3 )
x = 26
! 20 points to those who give me the answer!
The surface area of two similar figures are given. The volume of the larger figure is given. Find the volume of the smaller figure.
S.A (Smaller figure) = 567
S.A (Larger figure) = 1575
V (Larger figure) = 2500
Answers
Answer:
1575 is the answer
Step-by-step explanation:
About 217,000 high school students took the AP Statistics exam in 2017. The free-response section of the exam consisted of five open-ended problems and an investigative task. Each free-response question is scored on a 0 to 4 scale (with 4 being the best). For one of the problems, a random sample of 30 student papers yielded a mean score of x =1.267 and a standard deviation of 1.230. a. Find and interpret the standard error of the mean. b. Construct and interpret a 90% confidence interval to estimate the true mean score on this question.
Answers
The standard error is of 0.2246, which means that the mean scores for samples of 30 vary around 0.2246 from the mean.
What is a confidence interval?The confidence interval is the range of values that you expect your estimate to fall between a certain percentage of the time if you run your experiment again or re-sample the population in the same way.
The confidence interval formula is \(\bar x\pm t\frac{s}{\sqrt{n}}\).
Where, \(\bar x\) is the sample mean, t is the critical value, n is the sample size and s is the standard deviation for the sample.
Here,
\(\bar x\) =1.267, s=1.23, n=30
The standard error is Se= 1.23/√30
= 0.2246
Item a:
The standard error is of 0.2246, which means that the mean scores for samples of 30 vary around 0.2246 from the mean.
Item b:
Using a t-distribution calculator, considering a confidence level of 0.99 with 30 - 1 = 29 df, the critical value is t = 2.7564.
\(\bar x\pm tS_c\)
\(\bar x+ tS_c\) =1.267-2.7564(0.2246) =0.6479
\(\bar x- tS_c\) =1.267+2.7564(0.2246) =1.8861
Therefore, the 99% confidence interval to estimate the true mean score on this question is (0.6479, 1.8861). It means that we are 99% that the true mean score of all students in this question is between 0.6479 and 1.8861.
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How many 12 hours periods (half days) will pass after 25 hours? Enter only the whole number of period that have passed?
Answers
Answer:
2
Step-by-step explanation:
12 + 12 = 24
Find the limit of the difference quotients for f(x) = x2+2x+1 if a= -1
Answers
The limit of the difference quotients for f(x) = x^2 + 2x + 1 as x approaches -1 is indeterminate.
To find the limit of the difference quotients for the function f(x) = x^2 + 2x + 1 as x approaches -1, we need to evaluate the following expression:
lim(x→-1) [f(x) - f(-1)] / (x - (-1))
First, let's substitute the values into the expression:
lim(x→-1) \([(x^2 + 2x + 1) - (-1^2 + 2(-1) + 1)] / (x + 1)\)
Simplifying further:
lim(x→-1) \([(x^2 + 2x + 1) - (1 - 2 + 1)] / (x + 1)\)
lim(x→-1)\([x^2 + 2x + 1 - 0] / (x + 1)\)
lim(x→-1) \((x^2 + 2x + 1) / (x + 1)\)
Now, we can directly substitute x = -1 into the expression:
\((-1^2 + 2(-1) + 1) / (-1 + 1)\)
(1 - 2 + 1) / (0)
0 / 0
We have obtained an indeterminate form of 0/0. This indicates that we need to further simplify the expression or use other techniques, such as L'Hôpital's rule, to evaluate the limit. However, without additional information or simplification, we cannot determine the precise value of the limit at x = -1.
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If a phone cost $224 what would it cost if there was a 7% sales tax.
Answers
Answer:
$239.68
Step-by-step explanation:
Given
Cost = $224Sales Tax = 7%Solving
Cost w/ Tax = Cost (1 + Tax)Cost w/ Tax = 224 (1 + 0.07)Cost w/ Tax = 224 * 1.07Cost w/ Tax = $239.68solve the given system of equations2y=x+93x-6y=-15
Answers
Answer:
No solutions
Explanation:
The given system of equations is
2y = x + 9
3x - 6y = -15
To solve the system, we first need to solve the first equation for x, so
2y = x + 9
2y - 9 = x + 9 - 9
2y - 9 = x
Then, replace x = 2y - 9 on the second equation
3x - 6y = -15
3(2y - 9) - 6y = -15
3(2y) + 3(-9) - 6y = -15
6y - 27 - 6y = -15
-27 = -15
Since -27 is not equal to -15, we get that this system of equation doesn't have solutions.
HELPP FAST PLEASEEEE
Answers
Answer:
30%
Step-by-step explanation:
because I have answered this one and for it right
The area of a square is decreasing at a rate of 58 square centimeters per minute. At the time when the area of the square is 81, what is the rate of change of the perimeter of the square? Round your answer to three decimal places (if necessary).
Answers
SOLUTION
Step 1 :
In this question, we need to consider the following :
\(\begin{gathered} A=l^2 \\ \text{Differentiating both sides with respect to t, we have:} \\ \frac{\text{d A }}{d\text{ t}}\text{ =}\frac{d(l^2\text{ )}}{dt\text{ }}\text{ } \\ \\ \end{gathered}\)\(undefined\)URGENT! please answer. i'll give 5 stars + brainilest if correct
To estimate the height of a mountain, two students find the angle of elevation from a point (at ground level)
b
=
560
meters from the base of the mountain to the top of the mountain is
β
=
51
∘
. The students then walk
a
=
1850
meters straight back and measure the angle of elevation to now be
α
=
34
∘
. If we assume that the ground is level, use this information to estimate the height of the mountain.
The height of the mountain is
_____ meters.
Answers
Answer:
times the nimbers
Step-by-step explanation:
240
in a juice mixture, 750ml of water are mixed with 250ml of juice concentrate. What is the ratio of concentrate to water
Answers
Answer:
1:3
Step-by-step explanation:
What you want to do is solve for how much water will be for one fraction of juice concentrate.
To do that you can divide 750 by 250 to get 3. That means that 3 portions of water to one portion of concentrate would be the ratio.
Hope that helps and have a great day!
please help asap no trolls!
Answers
Answer:
\(D. These\ triangles\ cannot\ be\ proven\ congruent\)
Step-by-step explanation:
\(We\ are\ given:\\TU=SQ\\TP=PQ\\\angle TPU= \angle SPQ [Vertically\ Opposite\ Angles\ Are\ Equal]\\Hence,\\As\ we\ are\ given,\ 2\ sides\ and\ 1\ angle\ of\ each\ triangle\ correspond,\ we\\ could\ use\ the\ SAS\ Congruency Rule.\\But:\\\)
As SAS Congruency Rule tells us that 'Two triangles are congruent only if two sides and an included angle of one triangle corresponds to two sides and an included angle of the other' .
Here,
As ∠TPU and ∠SPQ are NOT the included angle of ΔTUP and ΔSPQ respectively, the two triangles cannot be proven congruent through SAS Congruency.
Note: We also cannot apply SSA congruency as SSA congruency doesnt exist.
siete veces un número en expresión algebraica
Answers
In algebra, "seven times a number" is written as 7x, which is the multiplication of seven instances of the symbol x.
What is the formula for algebraic expressions?An equation that includes constants, variables, and a few algebraic operations is said to be algebraic. A good example of an algebraic expression is 3x2 2xy + d. So, three different types of fundamental building blocks make up an algebraic expression: Coefficient (i.e. numbers) (i.e. numbers)
A seven-times-a-number is represented by multiplying it by seven or adding it to another integer (since this is an abbreviated successive addition ).
If x is any number, then it may be written as follows seven times: Algebraic expressions (numbers or letters) are linked by fundamental operations including addition, subtraction, multiplication, and division in mathematical language.
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Complete question -
Seven times a number in algebraic expression
a restaurant is offering chicken specials numbered 1,2,3,4,5,6 and fish specials numbered 1,2,3,4,5. let: c be the event of selecting a chicken special, f be the event of selecting a fish special, e be the event of selecting an even numbered special, and o be the event of selecting an odd special. selecting the fish special number 3 is an example of which of the following events?
Answers
E'
F and O
Because the special is fish and the number is odd, the selection is an example of F and O. Since the selection is not odd, it is an element of E′ (remember that E′ is the complement of E). Therefore, it is also an example of C AND O, and E′.
Probability is a way to gauge how likely something is to happen. Many things are difficult to forecast with absolute confidence. Using it, we can only make predictions about the likelihood of an event happening, or how likely it is. Probability can vary from 0 to 1, with 0 being an impossibility and 1 denoting a certainty. For pupils in Class 10, the probability is a crucial subject since it teaches all the fundamental ideas of the subject. One is the probability of every event in a sample space.
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to make his special drink, jerome uses 8 cups of water and 3 cups of drink mix. what is the ratio of water to drink mix?
Answers
Answer:
8:3
Step-by-step explanation:
read the question carefully
Answer:
8/3 or 8:3
Step-by-step explanation:
It says WATER to DRINK MIX. Therefore, It can't be 3:8 or 3/8. The only thing to make sense is 8/3 or 8:3
You invested $23,000 in two accounts paying 6% and 7% annual interest, respectively. If the total interest earned for the year was $1560, how much was invested at each rate?
Answers
Answer:
$ 18,000 was invested at 7%, and $ 5,000 was invested at 6%.
Step-by-step explanation:
Given that I invested $ 23,000 in two accounts paying 6% and 7% annual interest, respectively, and the total interest earned for the year was $ 1,560, to determine how much was invested at each rate, the following calculation must be performed:
23,000 x 0.07 + 0 x 0.06 = 1,610
22,000 x 0.07 x 1,000 x 0.06 = 1,600
21,000 x 0.07 x 2,000 x 0.06 = 1,590
20,000 x 0.07 x 3,000 x 0.06 = 1,580
19,000 x 0.07 x 4,000 x 0.06 = 1,570
18,000 x 0.07 x 5,000 x 0.06 = 1,560
Thus, $ 18,000 was invested at 7%, and $ 5,000 was invested at 6%.
A jar contains only dimes and nickels. The total number of coins in the jar is
15
. The total value of the coins is
$
1.00
. How many of each type of coin are in the jar?
Answers
Answer:
5 dimes and 10 nickels
Step-by-step explanation:
0.1d + 0.05n = 1
d + n = 15
d + 0.5n = 10
d + n = 15
0.5n = 5
n = 10
d + n = 15
d + 10 = 15
d = 5
Answer: 5 dimes and 10 nickels
There are 26 boys and 20 girls in a class.
The boys and the girls have some counters.
The mean number of counters that the boys have is 28.
The mean number of counters that the girls have is 19.
Work out the mean number of counters the 46 children have.
Answers
Computing the total number of counters in the class as 1,108, the mean number of counters that the 46 children have is 24.
What is the mean?The mean refers to the average value.
The average is the quotient of the total value divided by the number of items in the data set.
The number of boys in the class = 26
The number of girls in the class = 20
The total number of boys and girls in the class = 46
The mean number of counters that the boys have = 28
The total number of counters that the boys have = 728 (28 x 26)
The mean number of counters that the girls have =19
The total number of counters that the girls have = 380 (19 x 20)
The total number of counters that the class has = 1,108 (728 + 380)
The average or mean number of counters in the class = 24 (1,108 ÷ 46)
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