3 years ago

Solve for the variable. x ÷ -9 = -7 A. -16 B. -2 C. 0.8 D. 63

Mathematics

2 answers:

Feliz [49]3 years ago

8 0

I think the answer is d)63

frutty [35]3 years ago

3 0

If your equation is $\frac{x}{-9} = -7$ , the only thing you need to do to get x by itself is to get rid of the denominator, the $-9$ . To get rid of a denominator, you multiply both sides by it, so you're left with

$x=-9*-7$ so $x=63$

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Number 15. Find the equation of the line that passes through (3,-1) and is perpendicular to the line that passes through (-5, 2)

MArishka [77]

For lines to be perpendicular their slopes must be negative reciprocals of one another, mathematically:

m1*m2=-1

So we first need to find the slope of the reference line.

m=(y2-y1)/(x2-x1)=(7-2)/(-1--5)=5/4

So the perpendicular line will have a slope of:

5m/4=-1

m=-4/5

So our perpendicular line so far is:

y=-4x/5+b, now we can use point (3,-1) to solve for the y-intercept, "b"

-1=-4(3)/5+b

-1=-12/5+b

-5/5+12/5=b

7/5=b

So the line is:

y=-4x/5+7/5 or more neatly

y=(-4x+7)/5

y=-0.8x+1.4

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3 years ago

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Oksanka [162]

I think the answer is C. (a.k.a the third one)
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3 0

3 years ago

Read 2 more answers

(PLEASE HELP ME)

Schach [20]

This right answer is D.
because -65 divided by -13 is 5

8 0