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

C.  (7, 0)

Step-by-step explanation:

Here, the given equation,

The order pair ( in which first value shows a and second value shows b ) that satisfies the given equation is called the solution of the equation,

For (-3, -2)

3(-3) - 4(-2) = 21 ( False )

For (0, 7),

3(0) - 4(7) = 21 ( False )

For (7,0),

3(7) - 4(0) = 21 ( True )

For (-2, -3),

3(-2) - 4(-3) = 21 ( False )

Thus, only (7,0) is the solution of the given equation,

Option 'C' is correct.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation: