The answer to number 23 is D, 49.
Answer:

Step-by-step explanation:
We have the product,
.
It is known that,
'When we multiply a scalar with a matrix, the scalar is multiplied by each element of the matrix'.
So, we get,
.
⇒ 
⇒ 
So, the resulting product is
.
Answer:
2.5
Step-by-step explanation:
y=kx, k is constant of prop
Answer:
(2.5*(30/5)+6)*12=252
Step-by-step explanation:
Convert to slope-intercept form.
5x - 2y = 10
2y = 5x - 10
y = (5/2)x - 5
So the slope is 5/2 and y-intercept is at (0, -5).