2x + 5y = -3 ⇒ 2x + 5y = -3
1x + 8y = 4 ⇒ <u>2x + 16y = 8
</u> -<u>11y</u> = <u>-11 </u>
-11 -11
y = 1
2x + 5(1) = -3
2x + 5 = -3
<u> -5 -5</u>
<u>2x</u> = <u>-8</u>
2 2
x = -4
(x, y) = (-4, 1)
2x + 1y = 7 ⇒ 2x + 1y = 7
1x - 2y = -14 ⇒ <u>2x - 4y = -28</u>
<u>5y</u> = <u>35</u>
5 5
y = 7
2x + 7 = 7
<u> -7 -7</u>
<u>2x</u> = <u>0</u>
2 2
x = 0
(x, y) = (0, 7)
Answer:
3x - 3= x -19
X= -8
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Step-by-step explanation:
Step-by-step explanation:
a) barn area = 9 × 9 = 81 m^2
b) perimeter = 9 × 4 = 36m or
= 9+9+9+9 = 36m
Answer
a. The volume is multiplied by 4
b. The volume is doubled
Explanation
a. The volume of a cone with radius r and height h is . If the radius is doubled, the new volume will be , which is equal to . This means that the volume is multiplied by 4.
b. The volume of a cone with radius r and height h is . If the height is doubled, the new volume will be , which is equal to . This means that the volume is multiplied by 2.