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VARVARA [1.3K]
3 years ago
9

Simplify x^2 + 7y - 4y + 9x^2.

Mathematics
1 answer:
Evgen [1.6K]3 years ago
7 0

Answer:

10x^2+3y

Step-by-step explanation:

Add together the x^2 and the y's, so your equation is (x^2+9x^2)+(7y-4y)=10x^2+3y.

(hope this helps :P)

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√m/3=4<br> My teacher didn't explain how to solve these to well can someone explain?
Andrews [41]
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To remove the radical sign, square both sides.

(√m/3)² = 4²
m/3 = 16

To remove the denominator of 3, multiply both sides by 3.
3 (m/3) = 3(16)
m = 48

To check: Substitute m by its value.
√m/3 = 4
√48/3 = 4
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4 0
3 years ago
Mathswatch question on congruency. 25 POINTS
svetlana [45]

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3 0
2 years ago
Solve the equation. |x + 5| = 9 {–4, 14} {–14, 4} {4, 14} {–14, –4}
inna [77]

Answer:

{-14, 4}

Step-by-step explanation:

the absolute value function only makes sure that the result always has a positive sign.

so, (x + 5) must be either +9 or -9 to make the original equation true. the absolute value would turn both into +9.

so,

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6 0
3 years ago
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Step-by-step explanation:

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7 0
3 years ago
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Elenna [48]

Answer:

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Step-by-step explanation:

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If you would like more help on math or other subjects for FREE, check out growthinyouth.org.

5 0
4 years ago
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