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3 years ago

Alejandro solved the equation 5(7x^2-2)-8=3. He wrote 5(7x^2-2)-8=11 as his first step. What property justifies his first step?

Mathematics

2 answers:

I am Lyosha [343]3 years ago

6 0

Answer:

Step-by-step explanation:

The addition property of equality. It says that if you add the same number to each side of the equation, the two sides of the equation will be equal. In this case, the number 8 was added to each side.

Hope this helps :)

shusha [124]3 years ago

4 0

Answer:

B. Addition property of equality as his first step on solving 5(7x²-2)-8=3

Step-by-step explanation:

5(7x²-2)-8=3

5(7x²-2)-8+8=3+8 The amount added on the 1st member it is added on 2nd member of this equality

5(7x²-2)=11

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How would yoy simplify 4(5+x)

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Answer:

4x + 20

Step-by-step explanation:

4(5 + x) = 4 * 5 + 4 * x = 20 + 4x = 4x + 20

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3 years ago

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What value of a and b make the soulution of the equation x=2

lana [24]

Answer:

a=-9 b=-5

Step-by-step explanation:

a(3-x) = - 2x+b

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3 years ago

Can someone help me please??

vodka [1.7K]

Answer:

11,4 > 11 > 9,8 > 1

Step-by-step explanation:

To list the numbers from smallest to largest we need to determine the value of them in same/similar format

11 and 1 is in same format

The approximate value of $\pi ^{2}$ 9.8

the root of $\sqrt{121}$ = 11

the root of $\sqrt{130}$ is = 11.4 approximately

Now we have them as real numbers we can evaluate

11,4 > 11 > 9,8 > 1 we don't need to write 11 twice but if needed we can write is as:

11,4 > 11 = 11 > 9,8 > 1

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3 years ago

6m + 2(6 + 7m)=-128 How do I solve this step by step

Leni [432]

Answer:

M = 7

Step-by-step explanation:

6m + 2(6 + 7m) = -128

6m + 12 + 14m = -128

20m + 12 = -128

Subtract 12 both sides

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Divide by 20 both sides

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4 years ago

Rewrite each mixed number as a sum of two signed numbers 3 1/5 -7 3/8

ICE Princess25 [194]

Answer: $=-4\frac{7}{40}$

Step-by-step explanation:

$3\frac{1}{5}+\left(-7\frac{3}{8}\right)$

$=\frac{16}{5}+\left(-\frac{59}{8}\right)$

$\frac{16}{5}+\left(-\frac{59}{8}\right)=\frac{16}{5}-\frac{59}{8}$

$=\frac{128}{40}-\frac{295}{40}$

$=\frac{128-295}{40}$

$=\frac{-167}{40}$

$=-4\frac{7}{40}$

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3 years ago

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