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mixas84 [53]
4 years ago
14

Subtract 7a+3a-9 from 5a-6a-4 write your answer in the standard polynomial form

Mathematics
1 answer:
just olya [345]4 years ago
7 0

Answer:

  -11a +5

Step-by-step explanation:

(5a-6a-4) -(7a+3a-9) = a(5-6-7-3) -4+9 = -11a +5

You might be interested in
Complete the equation of the line through (4,-8) and (8,5).
Alisiya [41]
Slope = (5+8)/(8-4) = 13/4

y = mx + b
b= y  - mx
b = -8 - (13/4) (4)
b = -8 -13
b = -21

equation
y = 13/4x - 21
5 0
4 years ago
Houses cost £100000 one year ago <br> now they cost £________<br> this is a 25% increase
mixer [17]
The answer is 125,000

Work:
100,000 • 1.25 = 125000
8 0
3 years ago
Sally has a piece of cloth used 1/3 of a foot of the cloth to make a pillow cover in another 4/7 of a foot of the cloth to make
iren [92.7K]

Answer:

\frac{23}{21} feets

Step-by-step explanation:

Given.

Sally started with two feets of cloth.

Total cloth = 2 feets

She used \frac{1}{3} of a foot of the cloth to make a pillow cover.

And another \frac{4}{7} of a foot of the cloth to make a table cloth.

She used total cloth to make a pillow cover and table cloth = \frac{1}{3} +\frac{4}{7}

=\frac{7+12}{21} \\=\frac{19}{21}

Total used cloth by Sally = \frac{19}{21}

The equation for remaining cloth

remaining cloth = total cloth - used cloth

remaining cloth = 2 - \frac{19}{21}

remaining cloth = \frac{2\times 21-19}{21}

remaining cloth = \frac{42-19}{21}

remaining cloth = \frac{23}{21}

Sally has remaining cloth = \frac{23}{21} feets

8 0
3 years ago
Please help for 18 n 19
Hitman42 [59]
18. \ \ \frac{-1}{x-9}- \frac{-2}{x+7}= \frac{-1(x+7)+2(x-9)}{(x-9)(x+7)}= \frac{-x-7+2x-18}{(x-9)(x+7)}= \frac{x-25}{(x-9)(x+7)}


\frac{2}{x}+ \frac{12}{x}=7 \\    \\  \frac{14}{x} =7 \\  \\ x= \frac{14}{7} \\  \\ x=2
7 0
3 years ago
In planning her retirement, Liza deposits some money at 4.5% interest, with twice as much deposited at 5%. Find the amount depos
AlekseyPX

Let

x ----> amount deposited at 4.5%

y ----> amount deposited at 5%

we have that

y=2x----> equation A

4.5%=0.045

5%=0.05

so

0.045x+0.05y=1,595 ----> equation B

solve the system

substitute equation A in equation B

0.045(x)+0.05(2x)=1,595

solve for x

0.045x+0.10x=1,595

0.145x=1,595

x=11,000

Find y

y=2(11,000)=22,000

<h2>The amount deposited at 4.5% was $11,000 and the amount deposited at 5% was $22,000</h2>
5 0
1 year ago
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