Use substitution to solve each system of equations. Step by Step plz 4.) y=3x+8
2y=6x+16
5.) y=4x+5
12x-3y=9
6.) 7y=-2x+5
3x+10y=6

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

Question 3(multiple choice worth 1 points) use the arc length formula and the given information to find r. s = 16 cm, θ = 48°; r = ? sixty divided by pi cm thirty divided by pi cm one third cm one hundred twenty divided by pi cm

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?