Which ordered pair in the form (a, b) is a solution of this equation? 3a – 4b = 21 a. (–2, –3) b. (0, 7) c. (–3, –2) d. (7, 0)

Plug in all the 4 answer choices with the first number in place of a and second number in place of b. Whichever makes the equation correct, is the right answer. Let's try all four.

A. (:

. This doesn't make the equation equal 21. So this isn't the correct answer.

B. (:

. This doesn't make the equation equal 21. So this isn't the correct answer as well.

C. (:

. This doesn't make the equation equal 21. So this isn't the correct answer also.

D. (:

. This is equal to 21, so it makes the equation correct.

ANSWER: D

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

easy its decreasing

step-by-step explanation:

because its top point is at the to of the graph on the left side (atleast from the veiw i see it) now if that top point wast in the lower part of the graph it would be increasing hope this have a nice day