4)C
5)A
6)D
7)-4/3x-1(use formula y=mx+b, m is slope, x and y is the x and y of the one point that is given, b is y-intercept)
8)B
***Slope is the number multiplied with the x and y-intercept is the last number. It's obvious
Answer:
The 8 pounds bag
Step-by-step explanation:
Case 1 :
a pound cost 4/3
case 2 :
a pound cost 9/8
4×8 > 9×3
then

Therefore the 8 pound bag costs less
Answer:
x = 4; y = 2
Step-by-step explanation:
(1) 3x + 2y = 16
(2) 2x – 2y = 4 Add (1) and (2)
5x = 20 Divide each side by 5
(3) x = 4 Substitute (3) into (2)
2×4 – 2y = 4
8 - 2y = 4 Subtract 16 from each side
-2y = -4 Divide each side by -2
y = 2
<em>Check:
</em>
(1) 3×4 + 2×2 = 16
12 + 4 = 16
16 = 16
(2) 2×4 – 2×2 = 4
8 - 4 = 4
4 = 4

50 points decreased by 26% is
37 points.

50 points decreased by 26% is
37 points.