Answer:
A=1/2(b)(h)
Step-by-step explanation:
A=1/2(7)(6)
A=21
Answer:
7 x 4
Step-by-step explanation:
Let the width be x, length will be 3x-5. ATQ, x(3x-5)=28. x=4 and x=-7/3, since length isn't negative, x=4. Width=4 and length=7
Answer:

Step-by-step explanation:
The remainder theorem tells you that f(a) is the result of division of f(x) by (x-a).
Here, you have f(x)/(x+5) = 17, so a=-5 and f(-5) = 17.