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Gala2k [10]
3 years ago
8

Instruction

Mathematics
1 answer:
natulia [17]3 years ago
3 0

Answer:

Step-by-step explanation:

Your question has typographical errors. The equation is 2a + b = 15.7, not 2e+b-15.7

2a + b = 15.7

b = 15.7  - 2a

since a > b, a = 6.3 cm

b = 15.7 - 2·6.3 = 3.1 cm

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Explain why 3/4 and 9/12 are equivalent?
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8 0
4 years ago
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How do I solve for -31 -8r = -3(5r -6)
Dennis_Churaev [7]
Our current equation is:
-8r -31 = -3(5r -6)
To solve for this, we need to get r on one side of the equation and then simplify if needed.
On the right side of the equation, we have a pending Distributive Property, which is when you multiply the number/variable outside of the parenthesis by all numbers/variables in the parenthesis.
Let's simplify this Distributive Property to help understand our equation better.
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Multiply -3 by each number/variable separately (unless they are already being multiplied, like 2x, 1/2x, etc).
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Your equation now is:
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Add 15r to both sides to get r on one side.
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r is still being multiplied by 7, so we need to do the opposite of multiplying by 7.
Divide both sides by 7.
r = 7.
I hope this helps!
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