3 years ago

Once you have the value of a variable, how can you check that it is correct? "_it in!"

Mathematics

1 answer:

kirill115 [55]3 years ago

8 0

If you have a value for a variable you plug that value in and see if the resulting answer is true.

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Which of the following figures has 90 rotation symmetry?

garik1379 [7]

It would be a rectangle

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3 years ago

If 7x = 24 y, find the ratio of x to y.

MArishka [77]

Answer:

7:24 or $\frac{7}{24}$

Step-by-step explanation:

a ratio is usually defined as a fraction ( the first to the next)

8 0

3 years ago

The length of a rectangle is 6m more then the width. The area is 40m^2 . What is the length and the width?

erastova [34]

let the width of the rectangle be x

area of rectangle is l*b

x * (x + 6) = 40^2

x^2 + 6x = 40^2

x^2 + 6x = 1600

x + 6x =√1600

x + 6x = 40

7x = 40

x = 5.7

Hope you found this useful

4 0

3 years ago

In a laboratory, they were testing a certain bacteria. They stated with 50 bacteria and they noticed it triples every 30 minutes

MaRussiya [10]

I think it’s just 4(50•3)=600

4 0

3 years ago

Find the range of the following equation for the domain {-4, 0, 3} f (x) = -2x^2 -3

Tamiku [17]

The range of the function is {-34, -2, -20}

<h3>How to determine the range?</h3>

The function is given as:

f(x) = -2x^2 - 2

The domain is {-4, 0, 3}

Substitute the domain values in the function.

f(-4) = -2(-4)^2 - 2 = -34

f(0) = -2(0)^2 - 2 = -2

f(3) = -2(3)^2 - 2 = -20

This means that the range of the function is {-34, -2, -20}