Question

Which is the best estimate of x based on rounding the constants and coefficients in the equation to the nearest integer?

5.2x + 3.2 = 9.8

A.
1.1

B.
1.4

C.
1.5

D.
1.2

Answer 1

1. Identify.

5.2x+3.2=9.8
x could be 1.1, 1.4, 1.5, or 1.2

2. Lay it out

You will want to lay these all out to see what your equations are.
5.2•1.1+3.2=?
5.2•1.4+3.2=?
5.2•1.5+3.2=?
5.2•1.2+3.2=?

3. Round

Since all of the decimal #'s in the equation are below 4, you round down
BUT the answer goes up to 10!
5•1.1+3=?
5•1.4+3=?
5•1.5+3=?
5•1.2+3=?

4. Plug it in

5•1.1+3=8.5
5•1.4+3=10
5•1.5+3=10.5
5•1.2+3=9

So your answer is b. I hope this was helpful :3

Answer 2

@Death_The_Kid Yay! that was the answer I got too and I was checking to make sure I'm correct, thank you! :)

Answer 3

Your very welcome!