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shepuryov [24]
2 years ago
9

H(x)=x²-5 Find h(-7) Simplify your answer.

Mathematics
1 answer:
algol132 years ago
4 0

Answer:

h(-7) = 44

Step-by-step explanation:

h(x) = h (-7) means x= -7

h(x) = (-7)² - 5

49 - 5

44

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A new computer can complete a complex biochemistry calculation in 7 hours less than an older-model computer. Working together, t
Alchen [17]
The rate a computer works is 1/time. Working together, you add the rates.
Let new computer be x, old computer be y.
x = y - 7

\frac{1}{x} + \frac{1}{y} = \frac{1}{13} \\  \\ \frac{1}{y-7}+\frac{1}{y} = \frac{1}{13} \\  \\ \frac{2y-7}{y(y-7)} = \frac{1}{13} \\  \\ y(y-7) = 13(2y-7) \\  \\ y^2-33y+91 = 0 \\  \\ y = 29.96 \\  \\ x = y-7 = 29.96-7 = 22.96
Rounded to nearest tenth gives:
x = 23 hours
6 0
3 years ago
Please help me with this
GREYUIT [131]

Ths phrase that represents the algebraic expression (3p + 6)/(7p - 9) will be D. the sum of three times a number and six divided by the difference of seven times the number and nine.

<h3>How to illustrate the algebra?</h3>

It should be noted that an algebra is simply used to show the relationship between variables.

Here, the phrase that represents the algebraic expression (3p + 6)/(7p - 9) will be the sum of three times a number and six divided by the difference of seven times the number and nine.

In conclusion, the correct option is D.

Learn more about algebra on:

brainly.com/question/723406

#SPJ1

7 0
1 year ago
Please please answer What is 4328 divided by 4
Lerok [7]
It is 1082. 

I hope it helps, you can do more on a calculator. :)))
6 0
3 years ago
Read 2 more answers
Let f (x)=-3x+ determine f (-5)
loris [4]
F(x)=-3x
f(-5)=-3* (-5)
 =15

hope ths help u !!!!!!!!!

^_^


6 0
3 years ago
Two equations are given below:
brilliants [131]
A − 3b = 16
a = b − 2

b - 2 - 3b = 16
2b = - 18
b = - 9

a = - 9 - 2
a = - 11

(-11,-9)
6 0
3 years ago
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