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3 years ago

Select all ratios equivalent to 20:5.

Mathematics

2 answers:

Anettt [7]3 years ago

4 0

The answer is : 40:10

*multiply by 2

If helpful, brainliest please !

OLga [1]3 years ago

4 0

Answer:

40:10 & 8:2

Step-by-step explanation:

20 * 2 = 40

5 * 2 = 10

8 * 2.5 = 20

2 * 2.5 = 5

2:1 does not work because only 2 * 10 = 20, but 1 *10 = 10 and there is no 10. There is only 5.

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Please answer thissss thank youuu

Georgia [21]

Answer:

a) f(x) = - 20x + 450
b) 30 pages left to read

Step-by-step explanation:

Given sequence:

430, 410, 390, ...

The first term is 430 and the common difference is - 20.

Required function is:

f(x) = 430 - 20Ix - 1) = 430 - 20x + 20 = 450 - 20x

f(x) = -20x + 450

Find the number of pages left after 21 days:

f(21) = 450 - 20*21 = 450 - 420 = 30

5 0

3 years ago

If ab = c - d, which of the following is an expression for d in terms of a, b, and c?

horsena [70]

ANSWER

$d = - ab + c$

EXPLANATION

The given expression is

$ab = c - d$

To find an expression for d in terms of a, b, and c, means we want to make d the subject of the relation.

This means that, we need to isolate d on one side of the equation while all other terms are on the other side.

We subtract from both sides of the equation to obtain,

$ab - c = - d$

We now divide through by -1, to get,

$- ab + c = d$

Or

$d = - ab + c$

The topic is change of subject

3 0

4 years ago

Kim preformed a transformation on rectangle ABCD to create image A’B’C’D’, as shown in the figure below

Paul [167]

Answer:

Reflection over the x-axis

Step-by-step explanation:

Process of elimination, all of the other answers and the image is reflected over the x-axis perfect.

If rotated 270 degrees the image would be vertical

If reflected over the y-axis the image would be in Quadrant I not II

If rotated 90 degrees the image would be vertical as well.

So all othe the other answers are wrong making B) right.