Answer:
(4.5,-6)
Step-by-step explanation:
6x = 27
x = 27/6=4.5
9-3y = 27
-3y = 18
y = -6
Maximizing the Area of a Rectangle with Fixed Perimeter. Drag the locators to vary the width of the rectangle and see the effect on its area. For a rectangle with a perimeterof 40, the height is always 20 minus the width. This allows you to reduce the formula for the area, , to .
Answer:
Step-by-step explanation:
Let the number of coupon books be c and recipe books be r.
<u>Then we have following equations:</u>
- c + r = 42
- 12c + 7.5r = 441
<u>Substitute r in the second equation and solve for c:</u>
- r = 42 - c
- 12c + 7.5(42 - c) = 441
- 12c - 7.5c + 315 = 441
- 4.5c = 441 - 315
- 4.5c = 126
- c = 126/4.5
- c = 28
Answer:
Yes, you do have enough money for the jeans.
Step-by-step explanation:
Answer:
2.9 per gallon
Step-by-step explanation:
