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3 years ago

Explain how an estimate helps you place the decimal point when multiplying 3.7×5.1

Mathematics

2 answers:

Karo-lina-s [1.5K]3 years ago

6 0

3.7 estimates 4. 5.1 estimate to 5 so 4*5 =20.

Cloud [144]3 years ago

3 0

If you estimated 3.7 to 4 and 5.1 to 5 the answer would be 20. You would have 20 and now you can think is 20 a reasonable answer for 3.7x5.1. The answer for 3.7x5.1=18.87, so the answer is yes.

Hope that helped:)

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$\qquad\qquad\huge\underline{{\sf Answer}}$

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2 years ago

Please help, this is for 8th grade math.

expeople1 [14]

Answer:

(2,-2)

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The first step is to substitute y in the first equation with the right side of the second equation because they both equal to y.

-3x+4 = 4x-10

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-7x/-7 = -14/-7

x = 2

Plugin 2 for x for either equation to solve for y, I'll be using the second equation, but either one is fine.

y = 4(2)-10

y = 8-10

y = -2

Plugin x = 2 and y = -2 into (x,y), and you get (2,-2)

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3 years ago