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3 years ago

Study the table below. Label the table as proportional or non-proportional. Explain your reasoning.

Mathematics

1 answer:

aleksklad [387]3 years ago

7 0

Answer:

Proportional

Step-by-step explanation:

If the function is proportional, it will have the following relationship:

f(x) = kx

Let's look at the first one:

-14 = -7k

k = 2

Now let's see if k=2 is true for the rest:

0 = 2(0) True

10 = 2(5) True

16 = 2(8) True

f(x) = 2x. So this is indeed proportional.

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likoan [24]

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3 years ago

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abruzzese [7]

Answer:

7x + 14

Step-by-step explanation:

the first thing to do is expand the parentheses/brackets.

3(5x + 2) -2(4x - 4) will be

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3 years ago

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chubhunter [2.5K]

Answer:

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Step-by-step explanation:

a. ∑y

This is the sum of all values of y. So

$\sum y = 216 + 184 + 35 + 92 + 142 + 175 + 9 + 57 = 910$

b. (∑y)^2

This is the square of the sum, so the square of 910, that we found in the previous item.

910² = 828100

c. ∑y^2

This is the sum of the squares of each amount spent. So

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3 years ago

I need help with my quiz what is 100×100

creativ13 [48]

Answer:

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Step-by-step explanation:

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2 years ago

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Suppose an isosceles triangle abc has a=pi/4 and b=c=4. What is the length of a^2?

Zanzabum

The law of cosines states that, if $\alpha$ is the angle between sides b and c,

$a^2 = b^2+c^2-2bc\cos(\alpha)$

So, plugging our values, we have

$a^2 = 16+16-2\cdot 4\cdot 4\cdot\cos\left(\dfrac{\pi}{4}\right)$

This is equal to

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3 years ago