3 years ago

Please help me, I don't understand.

Mathematics

1 answer:

levacccp [35]3 years ago

3 0

The answer is a I’m pretty sure

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Help me with this question : <br><br><img src="https://tex.z-dn.net/?f=%20%5Cquad%20%5Ctt%20%5C%3A%28%20%20%7Ba%7D%5E%7B%7D%20%2

Bas_tet [7]

Answer:

a² + 2ab + b²

Explanation:

⇒ (a + b)²

⇒ (a + b)(a + b)

[apply distributive method: (a + b) (c + d) = ac + ad + bc + bd]

⇒ a² + ab + ab + b²

⇒ a² + 2ab + b²

3 0

2 years ago

Read 2 more answers

If x varies directly with y and y is 10 when x is 8, what is x when y is 18?

swat32

Knowing that x varies directly with y, we know the basic skeleton of the equation is y = mx.

To find m, plug in the known coordinate (8,10), where the x-coordinate is 8 and the y-coordinate is 10.
$y=mx \\ 10=m8 \\ (10)/8=(8m)/8 \\ m= \frac{10}{8} = \frac{5}{4}$

Then, plug in m to the equation to get y = (5/4)x.

Finally, plug in the y-coordinate 18 to the equation and solve for x!
$y= \frac{5}{4}x \\ 18= \frac{5}{4}x \\ \frac{4}{5}(18)=( \frac{5}{4}x) \frac{4}{5} \\ x= \frac{4*18}{5} \\ x= \frac{72}{5}$

Your exact answer is x = 72/5. However, if your teacher prefers decimals, then x = 14.4

Hope this helps!

5 0

3 years ago

Read 2 more answers

1. Select all the expressions that are equivalent to 4 - x.

viktelen [127]

Step-by-step explanation:

It is required to find the expressions that are equivalent to 4-x. We can also write it as :

Option (b) : (4-x) = 4+(-x)

Option (c) : (4-x) = -x+4

Hence, the correct options are (B) and (C).

4 0

3 years ago