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dusya [7]
3 years ago
12

A model airplane is shot up from a platform 1 foot above the ground with an initial upward velocity of 56 feet per second. The h

eight of the airplane above ground after t seconds is given by the equation h=-16t^2+56t+1 where h is the height of the airplane in feet and t is the time in seconds after it is launched. Approximately how long does it take the airplane to reach its maximum height?
A)0.3 seconds
B)1.8 seconds
C)3.5 seconds
D)6.9 seconds
Mathematics
1 answer:
PilotLPTM [1.2K]3 years ago
3 0

Answer: I think is none

Step-by-step explanation:

Tbh

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EASY QUESTION<br> What is the greatest common factor of 18, 36, and 90?
Pepsi [2]
18 will divide into both 36 and 90 , but so 18 is the GCF
7 0
3 years ago
Read 2 more answers
A theater charges $5.00 admission for adults and $2.50 for children. At one showing 240 admissions brought a total of $800. How
SOVA2 [1]

Answer:

80

Step-by-step explanation:

Let the number of adults be x

Let the number of children be y

This means that the money paid by adults and kids is $5 multiplied by x (5x) and $2.50 multiplied by y (2.5y)

This will give two equations as shown below

x + y = 240  <em>total admissions......................... equation 1</em>

5x + 2.5y = 800  <em>total money paid..................equation 2</em>

<em />

<em>Making x the subject of formula in equation 1</em>

x=240-y<em>......................................................equation 3</em>

Substituting equation 3 into equation 2

5(240-y) + 2.5y = 800  <em>removing the brackets</em>

1200 - 5y + 2.5y = 800 <em>grouping like terms</em>

-5y + 2.5y = 800-1200  <em>simplifying </em>

-2.5y  = -400 therefore

-2.5y/-2.5 = -400/-2.5

y = 160

<em>Substituting y into equation 3</em>

x = 240 - y

x = 240 - 160

x = 80

Hence number of adults who attended = 80

8 0
3 years ago
What is the solution set to the inequality 5(x - 2)(x + 4) &gt; 0?
Butoxors [25]

Answer:

You selected the correct answer: {x | x <<em> </em>-4 or x > 2}

Step-by-step explanation:

5(x - 2)(x + 4) > 0

Use FOIL method to expand (x - 2)(x + 4):

5(x^{2} + 2x - 8) > 0

Distribute 5 into (x^{2} + 2x - 8)

5x^{2} + 10x - 40 > 0

Divide all terms by 5 from both sides of the inequality:

\frac{5x^{2}}{5}  + \frac{10x}{5}  - \frac{40}{5} > \frac{0}{5}

x^{2} + 2x - 8 > 0

Factor the trinomial:

(x + 4) ( x - 2)  > 0

x < -4 or x > -2

Therefore, the solution set to the inequality is {x | x < -4 or x > 2}

<em>Interval notation:  </em>(-∞, -4) ∪ (2, ∞)

8 0
3 years ago
12y+72=0 solve the equation
Mandarinka [93]

Answer:

y = -6

Step-by-step explanation:

12y+72=0

12y = -72

y = -6

Check:

12(-6) + 72 = 0

-72 + 72 = 0

0 = 0

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3 years ago
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Can you please help?
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Answer:

what do you need help with

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