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masya89 [10]
3 years ago
7

Plssssssssssssssssssssssssssssssssssssssssssssss

Mathematics
1 answer:
eduard3 years ago
3 0

Answer:

34 hours

Step-by-step explanation:

Lets call M the number of hours that Maddie volunteered. Ryan volunteered 1 + 3×M hours, and altogether they volunteered 45 hours, so:

1 + 3×M + M = 45

1 + 4M = 45 Subtract 1 in both sides

4M = 44 Divide both sides by 4

M = 11 hours

So Maddie volunteered 11 hours, and Ryan volunteered

1 + 3×11 = 34 hours

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3 years ago
7 meters/ 20 minutes= x cm/ 2 hours
NemiM [27]

Answer:

x = 4200

Step-by-step explanation:

It is given 7 meters in 20 minutes.

We have to convert this ratio into "x" centimeters in 2 hours.

First, lets convert the given ratio to 2 hours (so time matches).

7 meters in 20 minutes

7 * 3 = 21 meters  in  20 * 3 = 60 minutes (1 hr)

So,

21 meters in 1 hr

That would mean:

21 * 2 = 42 meters in 1 * 2 = 2 hours

Now, we have:

42 meters in 2 hours

The time is same, now we just need to convert 42 meters to centimeters.

<em>we know 100 cm = 1 meter, so</em>

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Thus,

x = 4200 (cm)

6 0
3 years ago
Find each unit rate:
Sidana [21]

Answer:

The unit rate is 60 miles per hour

The unit rate is 2.5 meters per second

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The unit rate is 1.592 dollars per pound

Step-by-step explanation:

* Lets explain how to find the rate

- A rate is the ratio between two related quantities in different units

- To find the unit rate, divide the numerator of the given rate by the

 denominator of the given rate

* <em>Lets solve the problem</em>

# 420 miles in 7 hours

∵ The distance is 420 miles in time 7 hours

- The unit rate is how many miles in 1 hour

∴ The unit rate = 420 ÷ 7 = 60 miles per hour

∴ The unit rate is 60 miles per hour

# 40 meters in 16 seconds

∵ The distance is 40 meters in time 16 seconds

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∴ The unit rate = 40 ÷ 16 = 2.5 meters per second

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# 360 customers in 30 days

∵ There are 360 customers in 30 days

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# $7.96 for 5 pounds

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- The unit rate is the cost of per pound

∴ The unit rate = 7.96 ÷ 5 = 1.592 dollars per pound

∴ The unit rate is 1.592 dollars per pound

7 0
3 years ago
Solve for In(5z + 7) – 8
Elden [556K]

Step-by-step explanation:

In×5z+In×7

=1.67z +1.95-8

=1.67z-6.05

6 0
4 years ago
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