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maks197457 [2]
2 years ago
15

Of 38 ​cities, 7 have a lake and 21 have a river running through them. What fraction of these 38 cities have a lake or a river r

unning through​ them? Show your work. Which expression can be used to find the fraction of cities that have a lake or a river running through​ them? Select the correct choice and fill in the answer box to complete your choice.
Mathematics
1 answer:
Firlakuza [10]2 years ago
3 0
Bxndjdjjrjdjfbcbcbcb 77+ 77 38 actually just equal it all up
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Pls can any of you help with this.​
Lorico [155]
X=6 and Y= 6 square root 2
3 0
2 years ago
Find the area of the shaped region
Ganezh [65]

Answer: B

Step-by-step explanation:

A = 0/360 ×π×r^2

=135/360×π×11×11

=142.55 yd^2

5 0
3 years ago
The price P of a good and the quality Q of a good are linked.
Irina-Kira [14]

the equilibrium point, is when Demand = Supply, namely, when the amount of "Q"uantity demanded by customers is the same as the Quantity supplied by vendors.

That occurs when both of these equations are equal to each other.

let's do away with the denominators, by multiplying both sides by the LCD of all fractions, in this case, 12.


\bf \stackrel{\textit{Supply}}{-\cfrac{3}{4}Q+35}~~=~~\stackrel{\textit{Demand}}{\cfrac{2}{3}Q+1}\implies \stackrel{\textit{multiplying by 12}}{12\left( -\cfrac{3}{4}Q+35 \right)=12\left( \cfrac{2}{3}Q+1 \right)} \\\\\\ -9Q+420=8Q+12\implies 408=17Q\implies \cfrac{408}{17}=Q\implies \boxed{24=Q} \\\\\\ \stackrel{\textit{using the found Q in the Demand equation}}{P=\cfrac{2}{3}(24)+1}\implies P=16+1\implies \boxed{P=17} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \stackrel{Equilibrium}{(24,17)}~\hfill



3 0
3 years ago
A furniture store had a chair that cost $33. After a few months the owner owner took 9% off the price. How much is the chair now
yawa3891 [41]

Answer:

$30.03

Step-by-step explanation:

To find what 9% of 33 is we need to divide 9% by 1

9% ÷ 1 = 2.97

33 - 2.97 = 30.03

4 0
2 years ago
Read 2 more answers
A statistics student would like to estimate the average age of students at her college. She would like to be 99% confident that
agasfer [191]

Answer:

Step-by-step explanation:

Given that a statistics student would like to estimate the average age of students at her college.

Population std dev =2.5years

For 99% , Z critical = ±2.59

Margin of error =  ±2.59*\frac{2.5}{\sqrt{n} }  \\= \frac{±6.475}{\sqrt{n} } =0.5

Simplify to get

\sqrt{n} =12.95

n = 167.70

n=168

She must survey 168 people

7 0
3 years ago
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