Answer:

Step-by-step explanation:
Given

Required
Cost of x pounds
To do this we simply multiply x by the rate



A = 3
b = 10
70/(10) + 5(3) - 2(10)
70/10 = 7
5(3) = 15
2(10) = 20
7 + 15 - 20 =2
2 is your answer
hope this helps
The value of a is -6
The value of b is 48
Answer:
The value of b is -42
Step-by-step explanation:
Parallel equations have identical or equal slopes. Given the form of the equation; y=5x+b and the point it passes through (8,-2) we determine the unknown value b by substituting x with 8 and y with -2. We solve the equation; -2 =5(8)+b to obtain b = -42
The best answer is A. The possible roots of this polynomial function 9i and -9i. It is possible that this polynomial function is a quadratic equation. It has a degree of two which means there are two roots and it is possible that the positive and negative value of 9i are its roots.