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SVEN [57.7K]
3 years ago
5

What is the sum of 21 and 5 times a number f is 61

Mathematics
2 answers:
sukhopar [10]3 years ago
5 0

Answer:

Answer is below

Step-by-step explanation:

21 + 5f = 61       Turn the words into an equation

-21        - 21       Subtract 21 from both sides

5f = 40              Divide both sides by 5

f = 8

If this answer is correct, please make me Brainliest!

oksian1 [2.3K]3 years ago
3 0

Answer:

f = 8

Step-by-step explanation:

21 + 5f = 61 \\ 5f = 61 - 21 \\ 5f = 40 \\  \frac{5f}{5}  =  \frac{40}{5}  \\ f = 8

<h3>Hope this helps</h3><h3><em>Brainliest</em><em> </em><em>Appreciate</em><em>d</em><em>.</em></h3>
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Hitman42 [59]
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2 years ago
What is 1/300000 as a decimal?
olasank [31]

Answer:

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Step-by-step explanation:

I am not sure my answer correct or not,hope you know it.

6 0
1 year ago
Assume that adults have IQ scores that are normally distributed with a mean of mu equals 105 and a standard deviation sigma equa
Sindrei [870]

Answer:

0.7698

Step-by-step explanation:

If you call your random variable X, then what you are looking for is

P(87 \leq X \leq 123)

because you want the probability of X being <em>between 87 and 123.</em>

We need a table with of the normal distribution. But we can only find the table with \mu = 0 and \sigma = 1. Because of that, first we need to  <em>normalize </em>our random variable:

Z = \frac{X - \mu}{\sigma} = \frac{X - 105}{15}

(you can always normalize your variable following the same formula!)

now we can do something similar to our limits, to get a better expression:

\frac{87 - 105}{15} = \frac{-18}{15} = -1.2

\frac{123 - 105}{15} = \frac{18}{15} = 1.2

And we transform our problem to a simpler one:

P(87 \leq X \leq 123) = P(-1.2 \leq Z \leq 1.2) = P(Z \leq 1.2) - P(Z \leq -1.2)

(see Figure 1)

From our table we can see that P(Z \leq 1.2) = 0.8849 (this is represented in figure 2).

Remember that the whole area below the curve is exactly 1. So we can conclude that  P(Z \geq 1.2) = 0.1151 (because 0.8849 + 0.1151 = 1). We also know the normal distribution is symmetric, then

P(Z \leq -1.2)= P(Z \geq 1.2) = 0.1151.

FINALLY:

P(Z \leq 1.2) - P(Z \leq -1.2) = 0.8849 - 0.1151 = 0.7698

5 0
3 years ago
What is the answer to -7=-12 (-2)+B please help!
insens350 [35]
I would solve it for B, but that's just what I think. So you would do -12 time -2 which is 24, then subtract 24 from both sides so that you would get B=-31
8 0
3 years ago
Read 2 more answers
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icang [17]

Answer:

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Step-by-step explanation:

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3 0
2 years ago
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