3 years ago

Do any of you know any written answers to the Probability Unit Test for 7th grade? I need a little help!

1 answer:

5 0

All tests across the world are different even if they're the same subject and stuff. I think it's easier for you to study, so if you have any questions about them please post them on Brainly!

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Torrey has $20 to buy a birthday present for her that she does this to buy a CD for $18 the sales tax is 7% does she have enough

Effectus [21]

No, because she will go over by .57 cents. So she won't be able to buy the gift. You can find the answer by dividing 18 by 7 and adding that answer to 18 to get the amount total you owe including tax.

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4 years ago

Which expression has a pair of like terms?

KATRIN_1 [288]

Answer: x-3+x+3y

Step-by-step explanation:

Because there is 2 x’s

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4 years ago

Greatest to least 73.05 74.01 73.50

marissa [1.9K]

Greatest to least:
74.01, 73.50, 73.05

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3 years ago

Read 2 more answers

Let X be the random variable representing the number of calls received in an hour by a 911 emergency service. A portion of the p

ivolga24 [154]

For any distribution, the sum of the probabilities of all possible outcomes must be 1. In this case, we have to have

$P(X=0)+P(X=1)+P(X=2)+P(X=3)+P(X=4)=1$

We're told that $p=P(X=1)=P(X=2)$ , and we're given other probabilities, so we have

$0.25+2p+0.10+0.05=1\implies2p=0.6\implies p=0.3$

The expected number of calls would be

$E[X]=\displaystyle\sum_xx\,P(X=x)$

$E[X]=0\,P(X=0)+1\,P(X=1)+\cdots+4\,P(X=4)$

$E[X]=1.4$

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3 years ago

Alice earned $622.50 in interest on her savings in the bank before interest the account had $12,450 what is the approximate perc

In-s [12.5K]

If we take 12450 to be the 100%, what is 622.50 off of it in percentage then? let's check.

$\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
12450&100\\
622.50&p
\end{array}\implies \cfrac{12450}{622.50}=\cfrac{100}{p}\implies p=\cfrac{622.50\cdot 100}{12450}$

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3 years ago