89. if x, y, and z are numbers such that xy + xz = 100, what is the value of x/5 (3y + 3z) + 10?

a. 60 + 2x

b. 62

c. 70

d. 130

e. 130 + 2x

Hello,

xy+xz=100==>x(y+z)=100
x/5*(3y+3z)+10=3/5*(x(y+z))+10=3/5*100+10=70

Answer C

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!