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exis [7]
3 years ago
5

Need help on this math problem

Mathematics
1 answer:
Lyrx [107]3 years ago
3 0

Answer:

the expression would be 20h+25

Step-by-step explanation:


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How do you solve the function y = 2.5^x for y=20 
Andre45 [30]
y=2.5^x;\ y=20\\\\2.5^x=20\\\\log_{2.5}2.5^x=log_{2.5}20\\\\x=log_{2.5}20\\\\x=log_{2.5}(2.5\cdot8)\\\\x=log_{2.5}2.5}+log_{2.5}8\\\\x=1+log_{2.5}8
6 0
3 years ago
A ball is thrown from a height of 105 feet with an initial downward velocity of 9 ft/s. The ball's height h (in feet) after t se
zloy xaker [14]

Answer:

t = 2.28 s

Step-by-step explanation:

h = 105 - 9t - 16t ^ 2

0 ft = 105 ft - 9t -16^t

To find the roots of a quadratic function we have to use the Bhaskara formula , the roots will give us the time it takes to reach zero height

ax^2 + bx + c  = 0

-16^t - 9t + 105 ft = 0 ft

a = -16    b = -9    c = 105

t1 = (-b + √ b^2 - 4ac)/2a

t2 =(-b - √ b^2 - 4ac)/2a

t1 = (9 + √(-9^2 - (4 * (-16) * 105)))/2 * (-16)

t1 = (9 + √(-81 + 6720))/ -32

t1 = (9 + √6639)/ -32

t1 = (9 + 81.84)/ -32

t1 = 90.84 / -32

t1 = -2.83 s

t2 = (9 - √(-9^2 - (4 * (-16) * 105)))/2 * (-16)

t2 = (9 - √(-81 + 6720))/ -32

t2 = (9 - √6639)/ -32

t2 = (9 - 81.84)/ -32

t2 = -72.84 / -32

t2 = 2.28 s

we have two possible values, we are only going to take the positive one, beacause we are talking about time

t2 = 2.28 s

3 0
3 years ago
enter a fraction)) as you can see i’m from an younger audience, i’m not smart as well- please help me out, i’m new to this as we
Crazy boy [7]

Answer:

1/5

hope it helps

Step-by-step explanation:

we can write it as

x÷ 3/7= 7/15

rest of the explanation in the pics above.

5 0
2 years ago
Which two fractions (1-9) equal a whole number? Use each digit once
emmasim [6.3K]

Answer:

9-6=3???

Step-by-step explanation:

3 0
3 years ago
In the equation 2x = 36 - 8, what is the next step in the equation solving sequence?
damaskus [11]

Answer:

The next step is to combine constants

Step-by-step explanation:

4 0
1 year ago
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