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diamong [38]
3 years ago
6

PLEASE HELP!!!!

Mathematics
2 answers:
Alex777 [14]3 years ago
8 0

Answer:

144 ft

Step-by-step explanation:

h = -16t ^2 + 64t + 80,

We want to find the maximum height or the vertex

This occurs when at

t = -b/2a

t = -64/ (2(-16)

  = -64/-32 = 2

When t=2

h(2) = -16 (2)^2 +64(2) +80

     = -16*4+128 +80

     =-64 +128 +80

     =144

h(2) = 144

The maximum height is 144

Nastasia [14]3 years ago
3 0

Answer:

144

Step-by-step explanation:

h=-16t^2+64t+80

So you have to figure out which number t results in the maximum h.

First find the range.

64t+80>16t^2

4t+5>t^2

t^2-4t-5

(t-5)(t+1)

t-1

It looks like t has to be less than 5 and greater than -1 to be positive.

Now just try the numbers 0, 1, 2, 3, 4

0: 80

1: 128

2: 144

3: 128

4:  80

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2 7/15 ÷ 3 2/3 =
Mama L [17]

Answer:

A. Or 37/55

Step-by-step explanation:

Cross-cancel common factor=

37/5x1/11

Multiply fractions=

37x1/5x11

Multply the numbers=

37/55

<u><em>Feel free to mark brainliest!</em></u>

6 0
4 years ago
Read 2 more answers
Polly surveyed 850 teenagers to find out their favorite type of music. She found that 32% of the teenagers surveyed like hard ro
Sergeu [11.5K]

Answer:

Part A: 272 teenagers surveyed like hard rock.

Part B: 200 is the total number of teenagers that Damian surveyed.

Part C: Polly surveyed 850 teenagers to find out their favorite type of music. She found that 132% of the teenagers surveyed like hard rock.

Step-by-step explanation:

Part A: % = 1/100, 32% = 32/100, so 32% of 850 is

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Part B: if Total is T, then 75% of T is = 150, i.e,

75/100 x T = 150, making T subject of relation, then T, Total = 200.

3 0
3 years ago
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What's the answer 3(-2n +9) = -15​
serg [7]

Answer:

3(-2n + 9) = -15​

<=>

-6n + 27 = -15

<=>

-6n = -42

<=>

n = 7

Hope this helps!

:)

8 0
3 years ago
At a movie theater, the price of 3 adult tickets and 5 child tickets is $63. The price of 6 adult tickets and 2 child tickets is
Aloiza [94]

Answer:

10.9

Step-by-step explanation:

7 0
3 years ago
Lunch for 4 people only $39.50
Dmitrij [34]

20/100 = 0.2

0.2 * 39.50 = 7.90

They should leave a $7.90 tip.

5/100 = 0.05

39.50 * 0.05 = 1.975 and rounds to 1.98

They should pay $1.98 in sales tax.

8 0
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