H=-16t^2+56t+1, the airplane is shot up from a platform 1 foot above the ground, so 1= - 16t^2+56t+1, we solve this equation
(- 16t+56)t=0, (- 16t+56)=0 or t=o, - 16t+56=0, implies t =3.5s
so the answer is C)3.5 seconds
-4
Because 15x-7x= 8x
8x+5x= 13x
13x= -52
-52 / 13= -4
x = -4
Answer:
The answer is C or x=-4.
Step-by-step explanation:
I hope this helps!
Answer:
A. 29
B. 11
C. 10
D. 12
Step-by-step explanation:
A. 180 - 122 = 58
58 divided by 2 = 29
-
B. 180 - 37 = 143
x = 11
5 x 11 = 55
8 x 11 = 88
55 + 88 = 143 + 37 - 180
-
C. the small box in a triangle means right angle = 90
90 - 68 = 22
(2x - 2) we subtract before finding out what x is
22 - 2 = 20
2x = 20 divide by 2 = 10
x is equal to 10
-
D. to find the total, you must figure out what each equation is to add them up to make 180.
(8x + 3) + (2x + 9) + 4x = 180
add up the numbers with x and the numbers without them
14x + 12 = 180
subtract 180 - 12 = 168
168 divided by 14 = 12
x = 12
Hope this helped !!
Answer:
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Step-by-step explanation:
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