sold the systems of equations below
a.(12,-3)
,3)
,12)
d.(3,-3)

answer:

step-by-step explanation:

d.

5(3)+2(-3)= 9

5×3=15. 2×-3= -6

15+-6=9

2(3)-3(-3)=15

2×3=6

3×-3= -9

6- (-9) = 15

answer:

d

step-by-step explanation:

given the 2 equations

5x + 2y = 9 → (1)

2x - 3y = 15 → (2)

eliminate the term in y by multiplying (1) by 3 and (2) by 2

15x + 6y = 27 → (3)

4x - 6y = 30 → (4)

add (3) and (4) term by term

(15x + 4x) + (6y - 6y) = (27 + 30), that is

19x = 57 ( divide both sides by 19 )

x = 3

substitute x = 3 into (1) or (2) for corresponding value of y

using (1), then

(5 × 3) + 2y = 9

15 + 2y = 9 ( subtract 15 from both sides )

2y = - 6 ( divide both sides by 2 )

y = - 3

solution is (3, - 3 ) → d

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17