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3 years ago

15

PLEASE HELP

1 answer:

wlad13 [49]3 years ago

4 0

Answer:

The mistake is in step 1 when you do -2(x+4) you do the distributive property first -2 times x is -2x that's correct but -2 times 4 is not 8 it is -8

when you multiply by negatives the answer will always be a negative unless your multiply 2 negative number together then itll be positive ex. 4 × -4 = -16 (negative) but -4 × -4 = 16 (positive)

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Which of the following shows the correct order for -1 2/5, (-1)², -1.4 repeating and (1/2)²

lukranit [14]

Answer:

<h2>b. -1.4 repeating<-1 2/5<(1/2)²<(-1)²</h2>

Step-by-step explanation:

Calculate and convert the fractions (mixed number) to the decimals:

$-1\dfrac{2}{5}=-1\dfrac{2\cdot2}{5\cdot2}=-1\dfrac{4}{10}=-1.4\\\\(-1)^2=(-1)(-1)=1\\\\-1.4444...\\\left(-\dfrac{1}{2}\right)^2=\left(-\dfrac{1}{2}\right)\left(-\dfrac{1}{2}\right)=\dfrac{1}{4}=\dfrac{1\cdot25}{4\cdot25}=\dfrac{25}{100}=0.25$

We have

$-1.4;\ 1,\ -1.444...,\ 0.25$

Therefore

$-1.444...$

4 0

4 years ago

2y-17+y=180? What is the answer when it comes to it being a linear pair?

Alex Ar [27]

Answer:

65.6666666666666666666666666666666666666666667

Step-by-step explanation:

180+17=197. 197/3=65.66666666666666666666667

3 0

4 years ago

Which is the best first step when solving the following system of equations? X+y=3 4x-y=7

Serggg [28]

Answer:

Add the two equations together to eliminate y

Step-by-step explanation:

X+y=3

4x-y=7

I would use elimination since one equation has +y and one equation has -y

Add the two equations together

X+y=3

4x-y=7

-------------------

5x = 10

4 0

4 years ago

Read 2 more answers

Help help me plzzzzzzz

7nadin3 [17]

Answer:

1). 25% percentage increase

2). 75% percentage decrease

Step-by-step explanation:

1.

$Percent \: of \: change = \frac{amount \: of \: change}{original \: amount} \times 100\%$

Amount of change =30-24=6

Original amount = 24

$Percent \: of \: change = \frac{6}{24} \times 100\%$

$Percent \: of \: change = \frac{1}{4} \times 100\% = 25\%$

This means there is a percentage increase of 25%

2.

Amount of change =4-16=-12

Original amount=16

$Percent \: of \: change = \frac{ - 12}{16} \times 100\%$

$Percent \: of \: change = - \frac{3}{4} \times 100\% = - 75\%$

This means there is a percentage decrease of 75%

5 0

3 years ago

Find the equation of the perpendicular line passing through the midpoint of the line segment connecting (−1, 7) and (2, 3). inco

valkas [14]

Eh this is probably correct ?

7 0

3 years ago