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Bezzdna [24]
3 years ago
6

HELP PLS I NEED TO TURN IT IN MONDAY!

Mathematics
1 answer:
AnnyKZ [126]3 years ago
6 0

Terri can swim 3 laps in 2.5 minutes. To find how long it takes to swim 20 laps, you can make a proportion.

\frac{Lap}{Time}

Put the amount of laps on the top and the time(minutes) at the bottom.

\frac{3}{2.5} = \frac{20}{x}

Cross multiply:

20 \times 2.5 = 50

Divide by 3:

50 \div 3 = 16 \frac{2}{3} \rightarrow 16.67

It would take Terri 16 \frac{2}{3} OR 16.67 minutes to run 20 laps.

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Find the missing length of the triangle. If necessary, round your answer to the nearest tenth
Amiraneli [1.4K]

Answer:

30

Step-by-step explanation:

Since this is a right triangle, we can use the Pythagorean theorem to find the missing side

a^2 +b^2 = c^2  where a and b are the sides and c is the hypotenuse

x^2 + 40^2 = 50^2

x^2 +1600 = 2500

x^2 = 2500-1600

x^2 = 900

Take the square root of each side

sqrt(x^2) = sqrt(900)

x = 30

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3 years ago
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Katen [24]

Answer:

B. 3/11

Step-by-step explanation:

the division symbol: ÷ essentially is the same as /

if you replace ÷ with / its the same thing.

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2 years ago
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Points C, A, and B are collinear. Which of the following options is another name for CA ?
Flauer [41]
AC

Same line segment just goes in the other direction.
3 0
3 years ago
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There are 13 salespeople at a car dealership. last year, they each sold the same number of cars. Together, they sold 1,157 cars.
klemol [59]

Answer:

Each salesperson sold 89 cars last year.

Step-by-step explanation:

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13x/13 = 1157/13   Divide 1157 by 13

x = 89

3 0
3 years ago
Given the function f(x) = 3 x - 21 + 6, for what values of x is f(x) = 18?
IrinaK [193]

Answer:

X=2

If 21+6=27 then subtract what f(x) is (which is 18) from the 27. 27-18=6 then 3x2=6 so therefore your answer is 2. Hope this helps!!

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