2 years ago

I have questions up will mark brainliest

Mathematics

1 answer:

Elenna [48]2 years ago

4 0

Answer:

what questions?

Step-by-step explanation:

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ABC Bookstore sells one customer 12 used books and 4 new books for $136.

Natalka [10]

Answer:

n=6 u=28/3

Step-by-step explanation:

system of equations

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2 years ago

lab scale known to have a standard deviation of 0.001gram, speimen weghtted 8 times. average weiht is 4.1602 gram. what is 99% c

gtnhenbr [62]

Answer:

$99\% CI=4.1602 \pm 0.0009$

Step-by-step explanation:

From the question we are told that:

Sample size $n=8$

Mean $\=x=4.1602$

Standard deviation $\sigma=0.001gram$

Generally 99\% confidence from table is mathematically given by

$99\% CI=4.1602 \pm *2.576*\frac{0.001}{\sqrt{{8}}}$

$P(-z$

$Z_{\alpha/2}=2.576$

Generally the equation for 99\% confidence level (CI) is mathematically given by

$99\% CI=\=x \pm Z_{\alpha/2*\frac{\sigma}{\sqrt{{n}}}$

$99\% CI=4.1602 \pm 0.0009$

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3 years ago

Given m||n, find the value of x

iris [78.8K]

Answer:

143

Step-by-step explanation:

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3 years ago

Hannah is 3 years older than twice her brother Joey’s age. Joey is 2 years old. How old is Hannah? Show all of your work!

DaniilM [7]

Answer:

Step-by-step explanation:

twice for joey's age so joeys age is 2 double that it will be 4 so 3+4=7

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3 years ago

A helicopter travels 240 miles every 2 hours. The vehicle travels miles.

S_A_V [24]

is this the whole question because there's nothing to find?

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2 years ago