MATHEMATICS HIGH SCHOOL

If a car travels 55 miles per hour how far will it travel in half an hour

Answers

Answer 1

Answer:

Answer:

27.5 miles

Step-by-step explanation:

55 divided by 2 is 27.5

Answer 2

Answer:

Answer:

27.5 miles

always half it when it is half a mile

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-3x-y=-17 4x + 2 y equals 20

Answers

-3x - y = -17
4x + 2y = 20

multiply one part of the equation so that we can be able to use the process of elimination.

(-3x - y = -17)2
4x + 2y = 20

Now we have:

-6x -2y = - 34
4x+2y= 20
------------------------
-2x = -14

Divide -2 on both sides.

-2x = -14
/-2       /-2

x = -7.

=============================================

To solve for y, we just have to substitute the value of x to any of the equation given above, that we feel comfortable with. And I'm going to choose this equation: 4x + 2y = 20

4x + 2y = 20

4(-7) + 2y = 20

-28 + 2y = 20

Add 28 on both sides

-28 + 2y = 20
+28          +28
---------------------
2y = 48
/2      /2

y = 24.

The last thing you would do is to check if the answers is correct.
All you have to do is plug in the values of x and y into both equations and see if they equal to one another.

You may have to do this by yourself :P

Anyways, if you have any questions about this topic, feel free to PM me or any other users interested. Thank you for being part of Brainly! Have a nice day!

What is £56 divided in a ratio of 4:3?

Answers

In a ratio you must figure out the total number of parts. In this case we have a 4 part ratio and a 3 part ratio for 7 parts.

Each part of the ratio must be 1/7 of 56. So we divide 56/7 =8.

That means each part of the ratio is equal to 8.

We have 4 parts of the ratio that we must multiply by 8 4*8= 32
We have 3 parts of the ratio that we must multiply by 8 3*8 = 24

Therefore the ratio should be 32:24

Line KL has an equation of a line y = 4x + 5. Which of the following could be an equation for a line that is perpendicular to line AB? (6 points)y = 4x − 8

y = 1 over 4x − 8

y = −4x − 8

y = −1 over 4x − 8

Answers

To find a perpendicular slope (or line), the slope (in this case 4x) must be the opposite sign and its reciprocal, which is basically the fraction flipped upside down. Since 4 is technically 4/1, that fraction flipped is 1/4. And since you need to flip the sign too, instead of it being a positive number, it's negative. Your answer is -1/4x-8

y = -1 over 4x - 8 is the answer I think

What is the slope of a line that passes through (–14,13) and (7,0)? A. 21/13
B. -13/21
C. 13/21
D. -21/13