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Arisa [49]
3 years ago
12

Solve all of them step by step (12 points!)

Mathematics
2 answers:
Rashid [163]3 years ago
7 0
A) 2x + 4(x-1) = 2 + 4x
Multiply everything in the parenthesis by 4.

2x + 4x - 4 = 2 + 4x

Combine like terms.

6x - 4 = 2 + 4x

Subtract 4x from both sides.

2x - 4 = 2

Add 4 to both sides.

2x = 6

Divide 2 on both sides.

x = 3

b) 25 - x = 15 - (3x + 10)
Multiply everything in the parenthesis by -1.

25 - x = 15 - 3x - 10

Combine like terms.

25 - x = 5 - 3x

Add 3x to both sides.

25 + 2x = 5

Subtract 25 from both sides.

2x = -20

Divide 2 on both sides.

x = -10

c) 4x = 2x + 2x + 5(x - x)

Multiply everything in the parenthesis by 5.

4x = 2x + 2x + 5x - 5x

Combine like terms.

4x = 4x

This means that there is an infinite amount of solutions.

Hope this helps!
Olegator [25]3 years ago
4 0
(a)have aseconf ques. ans

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Compare partial products and regrouping how the methods are alike and different
shtirl [24]
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Regrouping is just like the commutative or associative property of numbers.
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3 0
4 years ago
Read 2 more answers
Compare 8^0 and 8^-2. which is greater? Explain your reasoning.
aev [14]

Hello there!

8^0 amd 8^-2


Let me start with 8^-2

8^-2 = 1/8 * 8

8^-2 = 1/64

which equals to 0.015625 in decimal


8^ 0 =  1

Yep, that's the answer! Easy, isn't? Well you may have been wondering why 8^0 is equal to 1.

I quoted an explanation online that says:    Think of "multiplication" as always including an extra "1" as a multiplier.

So it'd be like

8^ 0

8/8 = 1


Remember: Whenever a number has an exponent 0, the answer MUST be 1.


Thus,

8^0 is greater. As you can see, it is equal to 1, while the other one is equal to 0.01


I'm terrible at explaining stuff. I hope you find this answer somehow helpful :)

4 0
4 years ago
Read 2 more answers
Model each problem as an equation, and then match it to its solution.
jarptica [38.1K]

where are the problems?

3 0
3 years ago
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