2 years ago

Helppp pleasee I neeed help in this question!!

Mathematics

1 answer:

Katyanochek1 [597]2 years ago

5 0

Answer: B

Step-by-step explanation:

You have the same bases, so you can just focus on the exponents.

The difference between 5 and -1 is 6, therefore, the answer is B.

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How do you solve this

fiasKO [112]

(((x + y) / 3) + (1 / x)) / (5 + (15 / x))
The best way is to make it one fraction.
Multiply by ((3x/3x) / (3x/3x)) to remove the other fractions.
((x(x + y)) + 3(1)) / (5(3x) + 3(15))
(x^2 + xy + 3) / (15x + 45)
Then factor to simplify
(x^2 + xy + 3) / (3(x + 15))

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3 years ago

A normal distribution has a mean of 101 and a standard deviation of 3.4. What is the z-score of 105? Enter your answer, rounded

oee [108]

Answer:

Z-score = 1.18

Step-by-step explanation:

The z-score measures how many standard deviations from the mean a data is

Therefore the z score is the quotient between the difference between a value and the mean and the standard deviation

$Z =\frac{X-\mu}{\sigma}$

Where

μ is the mean, x is a data of the population and $\sigma$ is the standard deviation

In this case

$\mu =101\\\\\sigma = 3.4\\\\X = 105$

Then the z-score is

$Z = \frac{105-101}{3.4}\\\\Z = 1.18$

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3 years ago

Melanie invests $4,000 into an account offering 4% interest compounded annually. Gina invests $4,000 into a simple interest savi

VashaNatasha [74]

Melanie:
Amount after 5 years = 4000(1 + 0.04)⁵ = $4867

Gina:
Amount after 5 years = 4000 + 5(0.045 x 4000) = $4900

Answer: Gina has the greater balance and her balance is $4900.

4 0

2 years ago

Read 2 more answers

NEED HELP QUICK !!!<br> Find the value of side X ?

tankabanditka [31]

a²+b²=x²

4²+3²= x²

16+9= x²

25= x²

V25= x

5= x

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1 year ago

10 gallons of gasoline costs $130. The cost of gasoline per gallon is

antoniya [11.8K]

13 dollars per gallon

130\10 = 13

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2 years ago