Answer:
(0,-5) and (-4,3)
Step-by-step explanation:
The given equations are

Make y the subject in the second equation;

Substitute into the first equation;

Expand:





When x=0,

This gives; (0,-5)
When x=-4

This gives (-4,3)
Answer:
19.9 i think
Step-by-step explanation:
125/3.14=39.8
39.8/2=19.9
hope i helped
By substitution
f(6) = 1.8×2^(6)
= 1.8×64
= 115.2
Answer:

Step-by-step explanation:
Substitute the value of the variable into the equation and simplify.
Answer:
(f+g)(x) = x^2 +10x +7
Step-by-step explanation:
(f+g)(x) = f(x) +g(x) = (15x +7) +(x^2 -5x)
= x^2 +x(15 -5) +7
= x^2 +10x +7