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Virty [35]
3 years ago
11

Can some one help me answer this.

Mathematics
2 answers:
ss7ja [257]3 years ago
6 0

Answer:

y= 0.0025

Step-by-step explanation:

every number in the y place is mutipled by four so to find y you need to divide 0.01 by 4

Andre45 [30]3 years ago
4 0

Answer: y= 0.0025

Step-by-step explanation:

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I need help simplifying this expression<br><br> 9•(7-4)^2+9
marshall27 [118]

Answer:

90

Step-by-step explanation:

4 0
3 years ago
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Given f(x) =3x-1/2 solve for f^-1(4)
bazaltina [42]

f(x) = 3x - 1/2

f^{-1}(x) is the inverse of f(x). Let y = f(x)

y = 3x - 1/2

To find the inverse function, replace y with x and x with y

x = 3y - 1/2

After solving and simplifying the equation for y, you will get the following equation

y = x/3 + 1/6

This is the inverse of f(x). Now, substitute x = 4

y = 4/3 + 1/6

= 8/6 + 1/6

= 9/6

= 3/2

That should be your answer. Let me know if you need any clarifications, thanks!

5 0
3 years ago
A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with σ = 31.62
AysviL [449]

Answer:

A sample size of at least 737 specimens is required.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find the width M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

In this problem, we have that:

M = 3, \sigma = 31.62

So:

M = z*\frac{\sigma}{\sqrt{n}}

3 = 2.575*\frac{31.62}{\sqrt{n}}

3\sqrt{n} = 81.4215

\sqrt{n} = 27.1405

n = 736.60

A sample size of at least 737 specimens is required.

6 0
4 years ago
Holly deposited $10,000 in an investment account. After 6 years the account is worth approximately $13,400. Which formula repres
eimsori [14]
For this question you need to use the formula: y=p(1+r)^t. P is the principle, or the starting amount, $10,000, r is the rate of growth or decay, and t is the number of years. y=10,000(1.05)^x
3 0
3 years ago
Read 2 more answers
I need help asap<br> if F(4)=9, the corresponding ordered pair is what
vaieri [72.5K]

Answer:

F(5)=11.25

Step-by-step explanation:

I'm like 80% sure this is right, and I hope it helps.

First I did 9/4 which equals 2.25. and that would be F(1)

then added 2.25 to 9 which equals 11.25

multiplying 2.25 by 5 would also equal 11.25.

I did 5 because, on a number line, 5 comes after 4.

4 0
2 years ago
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