3 years ago

Under a

Mathematics

1 answer:

LuckyWell [14K]3 years ago

8 0

I hope this helps you

Exaolantion

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Solve the system of linear equations using linear combination.

brilliants [131]

3a + 6b = 45
2a - 2b = -12....multiply by 3
----------------
3a + 6b = 45
6a - 6b = - 36 ...(result of multiplying by 3)
---------------add
9a = 9
a = 1

3a + 6b = 45
3(1) + 6b = 45
3 + 6b = 45
6b = 45 - 3
6b = 42
b = 7

solution is : (1,7)

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3 years ago

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Rama09 [41]

Answer:

Step-by-step explanation:

(x + 12) + 100 + x = 180

2x + 112 = 180

2x = 68

x = 34

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2 years ago

Tami has a new pet crate for her dog. The length of the crate is four feet. The rectangular floor area of the crate is 1023 squa

Anit [1.1K]

Answer:

255.75 feet or 255 $\frac{3}{4}$ feet

Step-by-step explanation:

area of a rectangle / length = breadth

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3 years ago

Simplify 13 +4(9-7) and solve

Sliva [168]

Answer:

Step-by-step explanation:

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Convert 7,200 in scientific notation

Nitella [24]

Answer:

7.2*10^3.

7,200 in scientific notation, is 7.2*10^3

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