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3 years ago

20 POINTS

1 answer:

4 0

There are 2 solutions to this problem. One is that 2.5 is 120% of a number and that 2.5 is 80% of a number.
2.5=1.2x
x=25/12
2.5=0.8x
x=25/8

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Solve for y<br> 220-y = 29

Veseljchak [2.6K]

Answer:

y = 191

Have a great day :)

Hope this helps !

5INGH

Step-by-step explanation:

220 - y = 29

( - 220 from both sides )

- y = - 191

( × -1 on both sides )

y = 191

6 0

3 years ago

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Lina20 [59]

Answer:

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Can someone please help me with this problem?

Likurg_2 [28]

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3 years ago

Tim goes on a car journey.

Lesechka [4]

Answer:

1. Attached

2. 25 mph

Step-by-step explanation:

1. Tim travels first 15 minutes $=\frac{1}{4}$ hour at average speed of 40 mph and passed

$40\times \dfrac{1}{4}=10\ miles$

2. Time stops for 25 minutes (distance traveled = 0 miles).

3. He then completes the journey at an average speed of 45 mph. The total journey time is 1 hour, then he was travelling at 45 mph for

$60-15-25=20\ minutes=\dfrac{1}{3}\ hour$

and covered

$45\times \dfrac{1}{3}=15\ miles.$

The distance-time graph for his journey is attached.

Find the average speed for the whole journey:

$\text{Average speed}=\dfrac{\text{Total distance}}{\text{Total time}}=\dfrac{10+15}{1}=25\ mph$

7 0

4 years ago

uppose cattle in a large herd have a mean weight of 1158lbs and a standard deviation of 92lbs. What is the probability that the

Andreyy89

Answer:

Hence the probability that the mean weight of the sample of 55 cows would differ from the population mean by less than 12 lbs is 0.66545.

Step-by-step explanation:

7 0

3 years ago