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2 years ago

15a. Cindy can make $100 in four days babysitting. At that rate, how many day will it take

Mathematics

1 answer:

Sophie [7]2 years ago

6 0

Answer:

4.2

Step-by-step explanation:

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Two trains started moving at the same time, train A from Boston to New York, and train B from New York to Boston. The distance b

Ede4ka [16]

Answer:

After 1.7 hours

Explanation:

1. Calculate the average speed of train B

60mph = 3/4 (s) ⇒ s = 60 (4/3) mph = 80 mph

2. Build a table

When the two trains meet:

Train Average speed Distance time (distance/average speed)

mph

A 60 x x/60

B 80 240 - x (240 - x) / 80

3. Write the equation

The time, when the two trains meet, is the same for both trains:

$\dfrac{x}{60}=\dfrac{240-x}{80}\\ \\ \\ 80x=14,400-60x\\ \\ 80x+60x=14,400\\ \\ 140x=14,400\\ \\ x=14,400/140\\ \\ x=102.85miles$

4. Calculate the time:

x/60 = 102.86 / 60 = 1.7 hours

The two trains will meet after 1.7 hours

7 0

2 years ago

The measures of two angles of a triangle are 49° and 75°. Find the measure of the third angle in degrees.

Alexeev081 [22]

Answer: 56 degrees

Step by step:
The three angles in a triangle add up to 180 degrees.
49 + 75 + the third angle = 180
Let’s simplify.
180 - 49 - 75 = the third angle
So, by subtracting, we know that the third angle is 56 degrees!

Hope this helps! Please tell me if I did anything wrong, thank you so much and have a good day!

8 0

2 years ago

What is the number three and eight tenths as a decimal.

natali 33 [55]

Answer:

3.8

Step-by-step explanation:

3 8/10 can be written as 3.xx because all we have to do is 8 divided by 10 which equals .8 so 3+.8=3.8

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2 years ago

Will give brainliest

Wewaii [24]

Answer:

Step-by-step explanation:

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1 year ago

What is bigger 7 1/8 or 7.025?

Stolb23 [73]

7.025 is greater than 7 1/8

4 0

2 years ago

Read 2 more answers