Do question 14 plz if u do it s much i keep on getting a decimal answer that is wrong

57 degrees

Explanation:

A is complementary to B, so A+B = 90. Similarly, B+C = 90 (since C is complementary to B).

A+B = 90

(3x+y)+(x+4y+2) = 90 ... substitution

4x+5y+2 = 90

4x+5y = 90-2

4x+5y = 88

Now let's set up another equation and solve for x

B+C = 90

(x+4y+2)+(3y-3) = 90 ... substitution

x+7y-1 = 90

x = 90+1-7y

x = 91-7y

Go back to the first equation and plug in x = 91-7y. Solve for y.

4x+5y = 88

4(x)+5y = 88

4(91-7y)+5y = 88 ... replace x with 91-7y

364-28y+5y = 88

364-23y = 88

-23y = 88-364

-23y = -276

y = -276/(-23)

y = 12

Now that we know the value of y, we can use it to find x

x = 91-7y

x = 91-7(12) ... replace y with 12

x = 91-84

x = 7

So the x and y values are x = 7 and y = 12. We'll use both of these values to compute the measure of angle B

Angle B = (x+4y+2) degrees

Angle B = (7+4*12+2) degrees

Angle B = (7+48+2) degrees

Angle B = 57 degrees

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

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step-by-step explanation: