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3 years ago

4 − (x + 2) < −3(x + 4)

Mathematics

1 answer:

exis [7]3 years ago

5 0

Answer:

x<−7

Step-by-step explanation:

This is an inequality, so you treat as a equation, but when you multiply or divide by a negative number, you flip the inequality.

1. Use distributive property

-x+2<-3x-12

2. Add 3x to both sides.

2x+2<−12

3. -2 from both sides

2x<−14

4. Divide by 2

x<−7

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Write a polynomial that represents the length of the rectangle<br><br> help please !!

disa [49]

Answer:

$\textsf{Length}=0.8x^2-0.7x+0.7\quad \sf units$

Step-by-step explanation:

Area of a rectangle = width × length

Therefore, to find the length of the rectangle, we need to divide the area by the width.

Using long division:

$\large\begin{array}{r}0.8x^2-0.7x+0.7\phantom{)} \\x+0.5{\overline{\smash{\big)}\,0.8x^3-0.3x^2+0.35x+0.35\phantom{)}}}\\-~\phantom{(}\underline{(0.8x^3+0.4x^2)\phantom{-b))))))))))))))}}\\0-0.7x^2+0.35x+0.35\phantom{)}\\ \underline{-~\phantom{()}(-0.7x^2-0.35x)\phantom{-b)))))}}\\ 0.7x+0.35\phantom{)}\\\underline{-~\phantom{()}(0.7x-0.35)}\\ 0\phantom{)}\end{array}$

Therefore, the <u>length</u> of the rectangle is:

$0.8x^2-0.7x+0.7$

5 0

2 years ago

Estimate the sum of 279 and 217

Shalnov [3]

280 + 220 = 500 is the answer

6 0

3 years ago

A local bakery sells cookies for 5.50 per pound and brownies for 7.50

uysha [10]

Answer:

I may be wrong but i think the answer is D

Step-by-step explanation:

We know that y=10, so if we were to multiply 10 by 7.50, it would be 75, not 63, so A and B wouldn't be correct. and we don't know the value of x, so I think D is the best answer.

6 0

3 years ago

HELPPPPPPPP 7TH GRADE

egoroff_w [7]

Answer: 1 gallon

Step-by-step explanation:

Hi there!

Using the equation (12*18)-(7*3), where 12*18 is the area of the wall, 7*3 is the area of the door not being painted, you are left with 196 square ft. of wall. further dividing 196/200 is 0.98, meaning that Mr. Smith will only need one gallon of paint for his wall.

[(12*18)-(7*3)]/200

(215-21)/200

196/200

0.98

6 0

3 years ago

Read 2 more answers

QUICK HELP!!!!

sasho [114]

Answer:

$y = \frac{3}{4} x - \frac{3}{2}$