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gogolik [260]
3 years ago
10

How to solve this proof

Mathematics
1 answer:
pishuonlain [190]3 years ago
5 0

sorry do not know the answer'


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Solve the following system of equations. With multiplication <br> 4x– 3y = -11<br> - 7x-8y= 6
Aliun [14]

4x - 3y = -11

-7x - 8y = 6

We need to cancel out one of the variables so let's multiply the first equation by 8 and the second by 3 and aim to cancel y.

32x - 24y = -88

-21x - 24y = 18

Now we subtract,

53x = -106

x = -2

3y = 4x + 11 = 4(-2) + 11 = 3

y = 1

Answer: (x,y)=(-2,1)

Check:

4(-2) -3(1) = -8 - 3 = -11, good

-7(-2) - 8(1) = 14 - 8 = 6, good

5 0
3 years ago
Kesia knows that 1/4=0.25. Explain how she could use this fact to determine the decimal equivalent of 5/8
STatiana [176]
She knows that
0.25 =  \frac{1}{4}  =  \frac{2}{8}
\frac{5}{8}  =  \frac{2}{8}  +  \frac{2}{8}  +  \frac{1}{8}  = \\ 0.25 + 0.25 +  \frac{0.25}{2} =   \\ 0.25 + 0.25 + 0.125 = 0.625
4 0
3 years ago
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What is the slope of the line below? Give an exact number
Maksim231197 [3]

Answer:

-2 by 1

Step-by-step explanation:

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This entire page about functions has me stuck, I know the basics of functions and graphs but i'm still a little stumped, please
attashe74 [19]

Answer:

1. a 2.c

Step-by-step explanation:

7 0
3 years ago
Find the next number in the following sequences
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Not sure about the others but
b) 8,192
the pattern is multiplying by 8 each time for b
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