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3 years ago

Can you help me with this

Mathematics

1 answer:

adell [148]3 years ago

5 0

(5^-2 ● 4^-4)^-2

you need to multiply tge power of tge outside the bracket with tge power inside the bracket to eliminate the power

= 5^4 ● 4^8

the answer is A

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A scale on a bike path shows that 3 inches represents 5 miles. How many inches on the map are equal to 30 miles

PtichkaEL [24]

Answer:

18 inches.

Step-by-step explanation:

If the ratio for inches to miles is

$\frac{3}{5}$ ,

then you multiply the top and bottom by 6 to get to 30. This gets the numerator to 18 inches.

8 0

3 years ago

Find the multiplicity of 2x^3+x^2-x

OLEGan [10]

Mulitpilicty is how many times a root repeats

factor
factor x first

x(2x^2+x-1)
using math
(x)(x+1)(2x-1)
no roots repeat

if it is equal to 0 then the roots are
0 multiplicty 1
-1 multiplicty 1
1/2 multiplicty 1

4 0

3 years ago

The questions is in the picture so are the answers pls help!!! I’ll pick brainliest

SashulF [63]

The first choice because it’s easier than having to add a bunch of numbers so S=(9)(2)(4)

4 0

3 years ago

A university researcher wants to estimate the mean number of novels that seniors read during their time in college. An exit surv

lys-0071 [83]

Answer:

Population mean = 7 ± 2.306 × $\frac{2.29}{\sqrt{9} }$

Step-by-step explanation:

Given - A university researcher wants to estimate the mean number

of novels that seniors read during their time in college. An exit

survey was conducted with a random sample of 9 seniors. The

sample mean was 7 novels with standard deviation 2.29 novels.

To find - Assuming that all conditions for conducting inference have

been met, which of the following is a 94.645% confidence

interval for the population mean number of novels read by

all seniors?

Proof -

Given that,

Mean ,x⁻ = 7

Standard deviation, s = 2.29

Size, n = 9

Now,

Degrees of freedom = df

= n - 1

= 9 - 1

= 8

⇒Degrees of freedom = 8

Now,

At 94.645% confidence level

α = 1 - 94.645%

=1 - 0.94645

=0.05355 ≈ 0.05

⇒α = 0.5

Now,

$\frac{\alpha}{2} = \frac{0.05}{2}$

= 0.025

Then,

$t_{\frac{\alpha}{2}, df }$ = 2.306

∴ we get

Population mean = x⁻ ± $t_{\frac{\alpha}{2}, df }$ × $\frac{s}{\sqrt{n} }$

= 7 ± 2.306 × $\frac{2.29}{\sqrt{9} }$

⇒Population mean = 7 ± 2.306 × $\frac{2.29}{\sqrt{9} }$

3 0

3 years ago

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Simplify -3(y+4)+4y Please ANSWER FAST!!!!!

klemol [59]

Answer: y-12

Step-by-step explanation:

-3(y+4)+4y

first distribute teh -3 to the y and the 4, so you get -3y and -12. Then combine like terms. -3y-12+4y, add the -3y and 4y, you get y. So the answer is y-12.

5 0

3 years ago

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