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aksik [14]
3 years ago
13

What is the answer to this question

Mathematics
2 answers:
vodomira [7]3 years ago
8 0

Answer

a-21°

b-70°

c-89°

LenaWriter [7]3 years ago
5 0

Answer:

b=110°

a=21°

c=∆ABC=180

110°+21°=131°

180°-131°=49°

c=49°

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What is the equation of the line that is perpendicular to the line through (1,-4) and (-2,2) and passes through the x-intercept
ss7ja [257]

Answer:

y=-\frac{1}{2}x+\frac{3}{2}

Step-by-step explanation:

First, calculate the slope of the line that is perpendicular to the equation of line we are asked to find

m=(y2-y1)/(x2-x1)

  =(2-(-4))/(-2-1)

  =6/-3

  =-2

in this equation the slope is 2, and to find the first equation, use y=mx+b

use the point (1, -4) to find b

-4=(2)(1)+b

-4=2+b

b=-6

the first equation of the line is y=2x-6

to find the x intercept of that line substitute 0 for y

0=2x-6

2x=6

x=3

the slope of a line perpendicular to this would be the opposite reciprocal of the slope which would be equal to -1/2

for the second equation of the line to pass thorugh the x-intercept of the first line, it must pass through (3, 0), so substitute and solve for b

y=mx+b

0=(-1/2)(3)+b

b=3/2

thus the equation of the line that is perpendicular to the line through (1,-4) and (-2, 2) and passes through the x intercept of that line is y=-\frac{1}{2}x+3/2

8 0
3 years ago
What is the tenths in 86.43
ladessa [460]

Hey! Glad I can help!!!

0.4 is the tenth in there.

If satisfies please leave a review and give Brainiest :)

7 0
3 years ago
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Answer ALL if u cant see all the answers it don't matter all u need is the question
bekas [8.4K]
I'm probably wrong but I think A.
4 0
3 years ago
How do i solve this rational expression r-4/5r=1/5r+1
NNADVOKAT [17]

r - 4/5r  =  1/5r + 1

Subtract  1/5r from each side:    r - 4/5r - 1/5r  =  1

Combine all the 'r' terms on the left side: 

                                 r - 5/5r  =  1

                                 r  -  r  =  1

                                       0  =  1

There is no value of 'r' that can make ' 0 = 1 ' a true statement.
So the equation has <em>no solution</em>.


4 0
3 years ago
If f(x)=4-x^2 and g(x) =6x which expression is equivalent to (g-f)(3)
MArishka [77]

Answer:

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Step-by-step explanation:

Given:

f(x)=4-x^2 and g(x) =6x

h(3) = (g-f)(3)

= 6x - (4x^2)

= 6*3 -(4*3^2)

= 18 - 4*9

= -18

3 0
3 years ago
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