H²+10h+21 = 0
h²+3h+7h+21 = 0
h(h+3)+7(h+3) = 0
(h+3)(h+7) = 0
h+3=0
h = -3
h+7=0
h=-7
Answer:
SA = 144 ft²
Step-by-step explanation:
SA = 1/2(9)(6)(4) + (6 x 6) = 144 ft²
Answer:
10 < < 11
Step-by-step explanation:
The square root of 111 is approximately 10.536.
A number smaller than this is 10.
A number larger than this is 11.
The value of x is 10 and y is 20.
Solution:
<em>Sum of the adjacent angles in a straight line = 180</em>
⇒ 7x° + 90° + 20° = 180°
⇒ 7x° + 110° = 180°
Subtract 110° from both sides.
⇒ 7x° = 70°
Divide by 7 on both sides.
⇒ x° = 10°
In the image, 90° and (5x° + 2y°) are vertically opposite anlges.
<em>If two lines are intersecting, then vertically opposite angles are equal.</em>
⇒ (5x° + 2y°) = 90°
⇒ 5(10°) + 2y° = 90°
⇒ 50° + 2y° = 90°
Subtract 50° from both sides.
⇒ 2y° = 40°
Divide by 2 on both sides.
⇒ y° = 20°
Hence the value of x is 10 and y is 20.