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mafiozo [28]
3 years ago
13

A ball is thrown in the air. The relationship between the time the ball is in the air, t (in seconds), and the height of the bal

l in feet above the ground (h) is represented by h=-16t2+20t+6. How many seconds will it take for the ball to hit the ground?
Mathematics
1 answer:
Veseljchak [2.6K]3 years ago
6 0

Answer:

88

Step-by-step explanation:

87+1=88

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The table shows the number of games a chess player won in professional competitions, based on the number of games played.
AfilCa [17]

slope  = (25-4)/(30-10)

 slope = 21/20

slope =21/20  

using point slope form

y-y1 = m(x-x1)

y-4 = 21/20 (x-10)

y = 21/20x -21/2 +4

y = 21/20 x -21/2 +8/2

y = 21/20x -13/2


let x=40

y = 21/20 (40) -13/2

y = 42-13/2

y = 35.5 games


If we round the slope to 1

slope =1

using point slope form

y-y1 = m(x-x1)

y-4 = 1 (x-10)

y = 1x -10 +4

y =  x -6


let x=40

y = 40-6

y = 34 games


4 0
3 years ago
Answers: <br> 3x + 26<br> 5x + 15<br> x + 30<br> 10x - 7<br> please answer fast!
pentagon [3]

Answer: I think it's A. 3x + 26 but im not completely sure

Step-by-step explanation:

5 0
4 years ago
Which algebraic expression represents the word expression "three times the square of a number, n, subtracted from 54"?
sveta [45]

Answer:

54 - 3n²

Step-by-step explanation:

Square of a number n = n²

Three times the square of n = 3*n² = 3n²

Expression:

54 - 3n²

3 0
3 years ago
your mother gave you 14.28 with which to buy a present. this covered 3/4 of the cost. how much did the present cost?
saul85 [17]

$19.04. If your mom gave you $14.28, and it only covered 3/4 of the cost, you have to first find 3/4 as a percentage, and then put it into a decimal. It would be 0.75. So then you have to divide 14.28÷0.75. It turns out to be $19.04.

8 0
3 years ago
A number reduced by 15 results in 14. Which equation models this sentence?
Citrus2011 [14]
It would be B)m-15=14.
4 0
4 years ago
Read 2 more answers
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