Mathematics High School

I don’t understand the question
How do you work out
4x=20

Answers

Answer 1

Answer:

x = 5

Step-by-step explanation:

4x = 20

x is called a 'variable' and we fine the value of this variable.

Now, Given that

=> 4x = 20

To get the value of x, we divide the equation on the left hand side and right hand side by 4

=> 4x/4 = 20/4

In the left hand side 4/4 becomes 1 and in the right hand side 20/4 becomes 5.

=> x = 5

We get x = 5.

Hope it helps!

Related Questions

you arrive at your friends house at 7:45

Answers

Answer:

what are you trying to figure out? we cant answer with just that.

add more to the sentence and I can probably solve it :shrug:

#A-B= 56 78 and B = 2-1 3-4 then find A+B.​

Answers

The calculated value of the expression A + B is 60


Calculating the value of A + B

From the question, we have the following parameters that can be used in our computation:

A - B = 56

B = 2

Substitute the known values of B in the above first equation

So, we have the following representation

A - 2 = 56

Evaluate the sum

A = 58

Add B to both sides

A + B = 58 + B

So, we have

A + B = 58 + 2

Evaluate

A + B = 60

Hence the solution is 60

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Help me out please !!

Help me out please !!

Answers

Answer:

I'm thinking it's B

Step-by-step explanation:

Combine like terms to write an equivalent expression for 9y−7y.

Answers

Answer:

\(2y\)

Step-by-step explanation:

\(We\ are\ given:\\9y-7y\\We\ observe\ that\ the\ terms\ 9y\ and\ -7y\ share\ a\ same\ algaebraic\ co-\\ effecient\ due\ to\ which\ they\ are\ like\ terms.\\Hence,\\9-7y\\=9y+(-7y)\\By\ applying\ distributive\ property\ of\ addition:\\9y+(-7y)=(9+(-7))y=2y\)

If a = b, then ac = bc. This is called the

Answers

Answer:

Transitive property of equality

Step-by-step explanation:

here you go examples
If a = b, then ac = bc. This is called the

of 100 patients selected at random from a clinic, 33 were found to have high blood pressure. construct a 95% confidence interval for the percentage of all patients at this clinic that have high blood pressure.

Answers

We can say with 95% certainty that the genuine rate of all patients at this clinic who have high blood pressure is between 24% and 42%. 

To develop a 95% certainty interim for the rate of all patients at this clinic that have tall blood weight, we will utilize the equation:

CI = p ± z*(p*(1-p)/n))

where p is the sampling extent, z is the z-score related to the required certainty level (in this case, 1.96 for 95% certainty), and n is the test measure.

We are given that out of a test of 100 patients, 33 have high blood weight. In this manner, the test extent is:

p = 33/100 = 0.33

Utilizing the equation over, we will calculate the edge of the mistake:

Arduino

ME = z*(p*(1-p)/n)) = 1.96*(0.33*(1-0.33)/100)) ≈ 0.09

At that point, we are able to develop the 95% certainty interim:

CI = p ± ME = 0.33 ± 0.09 = (0.24, 0.42)

Hence, able to say with 95% certainty that the genuine rate of all patients at this clinic who have high blood weight is between 24% and 42%. 

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what number is in between 76 and 80

Answers

The number that is in between 76 and 80 is 78.

Hi! I am trying to solve this question for a homework assignment, but I can’t figure out what the answer is. Can someone please help?
In a scientific journal, we read that a certain substance weighs 0,000,418 grams.
Write this number in scientific notation.

Answers

Answer:

4.18 × 10^ 2

Step-by-step explanation:

Answer:

Step-by-step explanation:

I am assuming that number began with a decimal point.

Count how many places the decimal must move to the right to get past the 4, in this case the decimal must move 5 places. This means you are multiplying by 10^5. So the number in scientific notation becomes

4.18X10^(-5)

what is x-2+3 = -2 ​

Answers

Answer:

x=-3

Step-by-step explanation:

x-2+3=-2

Add 2 to both sides:

x+3=0

Subtract 3 from both sides:

x=-3

Hope this helps!

HELP PLEASE

x^2-2x-5

Answers

Step-by-step explanation:

the answer for this question is -6x

The answer for this question is is -6x

An accountant used to charge $50 per hour, but recently decided to charge $62 per hour. What was the percent of increase in the billing rate?

Answers

Answer:

24%

Step-by-step explanation:

we subtract to see how much it increased

62-50=12

Now divide 12 by 50 to get percent

12/50

0.24

0.24x100

24%

Hopes this helps please mark brainliest

Find the midpoint of ABif A(-3,6) and B(-9,-8).
(Only answer if you know it don’t guess)

Answers

Answer:

hello sorry im late the answer is (-6,-1)

Step-by-step explanation:

simultaneous equations please someone help me
2x +5y = -10 2x -y =8

Answers

Answer:

there is the answer to your question

simultaneous equations please someone help me2x +5y = -10 2x -y =8

Your school wants to take out an ad in the paper congratulating the basketball team on a successful season, as shown to the right. The area of the photo will be half the area of the entire ad. What is the value of X?

Your school wants to take out an ad in the paper congratulating the basketball team on a successful season,

Answers

Answer:

- 6 + 2√17  or approximately 2.25 in

------------------

The area of the photo is:

A(photo) = 8*4 = 32 in²

Area of the ad is:

A(ad) = (8 + x)(4 + x) = x² + 12x + 32

Area of the photo is half the area of the entire ad:

32 = (x² + 12x + 32)/264 = x² + 12x + 32x² + 12x - 32 = 0x = (-12 ± √(12² - 4(-32)))/2x = -6 ± 2√17

Only positive root makes sense:

x = - 6 + 2√17 ≈ 2.25

The lengths of two sides of a triangle are 11 and 17. Which
measurement cannot be the length of the third side? *

Answers

Answer:

Step-by-step explanation:

The third side must be less than 11+17 = 28 units

Someone please help no need to show work just answer (I will give brainliest)

Someone please help no need to show work just answer (I will give brainliest)
Someone please help no need to show work just answer (I will give brainliest)

Answers

Answer:

image 1 : 3.78

image 2 : 10.20

Step-by-step explanation:

I haven't done geometry in a bit but I'll try to help!

Someone please help no need to show work just answer (I will give brainliest)
Someone please help no need to show work just answer (I will give brainliest)

(X+9)(x-2)-9x-6 equivalen to

Answers

Answer:

hrheje

Step-by-step explanation:

bdhsjsiskskdkdhdhennsjss

Need help asap... thanks!

Need help asap... thanks!

Answers

Answer:

90

Step-by-step explanation:

We know that area of ∆BCD = half of the area of rectangle BEFD, since any triangle drawn from taking a side and base and a point on the opposite side as the 3rd vertex has the half area of the rectangle

so, area of ∆BCD = 15×12/2 = 90 (since two legs of the right triangle are 15 and 12)

since area ∆BCD is half the area rectangle BEFD and sum of the area of ∆BEC and ∆CFD will be the rest of the area of rectangle BEFD, which is 90

Please help! A is not -3 as I’ve seen some answer with that.

Please help! A is not -3 as Ive seen some answer with that.

Answers

Answer:

a) x = 5

b) x = 4

Step-by-step explanation:

a) \(\frac{3x+4}{2}\) = 9.5

  3x+4 = 9.5(2)

      3x = 19-4

        x = 15/3

         x = 5

b) \(\frac{7+2x}{3}\) = 5

  7+2x = 5(3)

      2x = 15-7

        x = 8/2

         x=4

What is the answer ASAP please

What is the answer ASAP please

Answers

Answer:

2,-1

Step-by-step explanation:

You read the X axis first then the Y axis

The sampling distribution is based on the assumption that the ________ hypothesis is ________. Group of answer choices research; true null; false null; true research; confounded

Answers

Answer:

True , null

Step-by-step explanation:

Mostly the true hypothesis is the null hypothesis .

We test the true hypothesis , the null hypothesis  against the claim provided which is named as alternate hypothesis.

When the false hypothesis is the null hypothesis , type II error is made.

Confounded in statistics means when the alternative explanations cannot be eliminated.But we have the alternate hypothesis in hypothesis testing.

So option 1 is correct


Help please I need help !!!

Help please I need help !!!

Answers

Answer:

with what nothing here to help you with. so is there an actual question you need help with?

8. Write y-x-y-x in simplest form.



10 points ​

Answers

Answer:

Easy -2x

Step-by-step explanation:Because both a positive y and a negative y cancle out eachother so all thats left is both of the negative x's

Write the linear equation of a line going through (-2,7) with a y-intercept of -3.

Answers

Answer:

y = -5x - 3

Step-by-step explanation:

A linear equation is y = mx + b

m = the slope

b = y-intercept

We know

Points (-2,7) (0,-3)

Slope = rise/run or (y2 - y1) / (x2 - x1)

We see the y decrease by 10 and the x increase by 2, so the slope is

m = -10/2 = -5

Y-intercept is located at (0, -3)

So, the equation is y = -5x - 3

Answer:

y = -5x - 3.

Step by step explanation:

We can use the point-slope form of a linear equation to find the equation of the line passing through the point (-2,7) with a y-intercept of -3.

Point-slope form of a linear equation: y - y1 = m(x - x1)

where m is the slope of the line, and (x1, y1) is the given point on the line.

Since the y-intercept is -3, we know that the point (0,-3) is also on the line. Using the two points (-2,7) and (0,-3), we can find the slope of the line:

slope = (y2 - y1) / (x2 - x1)
slope = (-3 - 7) / (0 - (-2))
slope = -10 / 2
slope = -5

Now we can plug in the values for the slope and the point (-2,7) into the point-slope form:

y - 7 = -5(x - (-2))

Simplifying and solving for y, we get:

y - 7 = -5x - 10
y = -5x - 3

Therefore, the equation of the line passing through the point (-2,7) with a y-intercept of -3 is y = -5x - 3.

Johnny has 6 /4 feet of material for his costume. He needs 10 2/3 feet for the entire costume. How much more material does he need?​

Answers

Answer:

9 2/12 more feet

Step-by-step explanation:

An airplane covers 3500 km in three hours. What would be the distance covered by the plane in 4.5 hours if it flies at the same constant speed. ( I need the proportion equation please help ASAP.)

Answers

Answer:

5,250 km

Step-by-step explanation:

\(\frac{hours}{miles}\) = \(\frac{hours}{miles}\)

\(\frac{3}{3500}\) = \(\frac{4.5}{x}\)  Cross Multiply

3x = (4.5)(3500)

3x = 15750 Divide both sides of the equation by 3

x = 5,250

WILL MARK U BRAINLIEST

WILL MARK U BRAINLIEST

Answers

Answer:

90

Step-by-step explanation:

First, we should find the area of the trapezoid, and then subtract the area of the removed triangle in order to find the shaded area.

Area of the trapezoid

1) Area of the rectangle in the middle.

Base Length: 10

Height Length: 10

Area: 10 x 10 = 100

2. Area of the triangles on the side

Base Length: (14 - 10)/2 = 2

Height Length: 10

Area: 2 x 10 x 1/2 = 10

There are two triangles: 10 x 2 = 20

Area of the trapazoid: 100 + 20 = 120

Area of the triangle that's been removed

Base Length: 10

Height Length: 10 - 4 = 6

Area: 10 x 6 x 1/2 = 30

Shaded area

Area of the trapezoid - Area of the triangle

120 - 30 = 90

Area of the shaded region is 90.

Use the equation of the least-squares regression line and the residual plot to estimate the actual mean weight of the infants when they were 1 month old

Answers

The actual mean weight of the infants when they were 1 month old is 4.297

The residual plot doesn't show any obvious leftover pattern, confirming that a linear model is appropriate.

the equation of this line as ˆy=12x−1 with an accent on the y to indicate that the y-values computed using this equation

y = 4.88 + 0.267(1)

y = 5.147

residual = -0.85 = A - 5.147 + 5.147

residual = 4.297

the actual mean weight of the infants when they were 1 month old is 4.297

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Please help me I need it soon

Please help me I need it soon

Answers

Ok so first you need to just ask ya teacher for help
bottom right = 20 degrees
left side of 104 = 76 degrees
right side of 104 = 76 degrees
bottom of 104 = 104 degrees

Hey everyone I need help!! Is my answer right? If not please say what is the right answer and explain! I will mark you brainlist after but yea have a great day everyone!!!!!!

Hey everyone I need help!! Is my answer right? If not please say what is the right answer and explain!

Answers

Answer:

it would be 2 pieces and 1/3

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