2 years ago

Find the slope of the line 4x-8y=15

Mathematics

1 answer:

Arisa [49]2 years ago

4 0

Answer:

-1 $\frac{7}{8}$

Step-by-step explanation:

4x-8y=15

4x-8y-4x=15-4x

-8y=15-4x

-8y/-8=15-4x/-8

y=-1 7/8+1/2x

slope is -1 7/8

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I need help,I need to use substitution but I don't know how

lions [1.4K]

If $y=x+6$ and $y=-2x-3$ , then you can replace $y$ in either equation with the equivalent expression given by the other equation. In this case, you have

$x+6=-2x-3$

and you can solve for $x$ .

$x+2x+6-6=-2x+2x-3+6\implies3x=3\implies\dfrac{3x}3=\dfrac33\impliesx=1$

Then $y=1+6=7$ .

For the second system, you can write

$5x-y=-5\implies 5x-5x-y=-5-5x\implies-y=-5-5x$

$\implies-(-y)=-(-5-5x)\implies y=5+5x$

Then substitute this into the second equation and you get

$3x-6(5+5x)=24\implies3x-30-30x=24\implies-27x-30+30=24+30$

$\implies-27x=54\implies x=2$

so that

$y=5+5(2)=15$

8 0

3 years ago

What is 0+9+2 times 8

Anni [7]

Answer:

That would be 88!

Step-by-step explanation:

5 0

3 years ago

PLEASE HELP

siniylev [52]

Answer:

A. 1/36 B. 1

Step-by-step explanation:

A. if (6^2)x=1; 6^2=36

36x=1

x=1/36

B. If (6^0)x=1; 6^0=1

(1)x=1

x=1

4 0

2 years ago

What is the reciprocal of -12

Butoxors [25]

The reciprocal is 1/-12 I think i am pretty stupid soooo

5 0

3 years ago

8000x260x623x105+547x6428

AnnyKZ [126]

This would= 136066716116

8 0

2 years ago

Read 2 more answers