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2 years ago

21 POINTS!Jeff had $20. He spent 3/8 of his money on lunch. How much money does jeff have left?

Mathematics

1 answer:

lara [203]2 years ago

4 0

Answer:

$12.50

Step-by-step explanation:

3/8 x 20/1 = 7.5

20 - 7.5 = 12.50

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5 - 9.5 = 5 + ? HELPPP

attashe74 [19]

-9.5 because 5-9.5=-4.5 and -4.5+9.5=5. So yeah 5-9.5=5+-9.5 ?

7 0

3 years ago

Vavilen inflated a huge balloon in 19 minutes. Then he poked a hole in the balloon so that it slowly leaked air out until it was

kaheart [24]

Considering balloon to be an spherical object

Volume of sphere = $\frac{4}{3}\pi r^3$ , where r is the radius of sphere.

After 19 minutes ,If radius of balloon changes from r to R, the Volume changes from V to V'.

V'= $\frac{4}{3}\pi R^3$ ,

As given,rate at which the air leaked out of the balloon (in liters of air per minute) was half of the rate at which Vavilen inflated the balloon.

Also, $\frac{dR}{dt}=2 \times \frac{dr}{dt}$

Now, again the radius changes from R to r.So, Volume changes from V' to Back to V.

Time taken by the balloon to deflate = 38 minutes

But there is no relation between time and volume of Balloon.

So, we can't predict at which rate balloon is deflating or inflating.Apart from the statement given in Question: $\frac{dR}{dt}=2 \times \frac{dr}{dt}$

7 0

3 years ago

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Which congruence theorems can be used to prove EFG congruent to JHG

MatroZZZ [7]

SAS you have two pairs of parallel sides

you have another pair of side congruent to one another

and angle G is the same to itself.

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3 years ago

A swimming pool measures 35 feet wide by 50 feet long. What is the ratio of the length to the perimeter in simplest form? Perime

9966 [12]

So, let’s find out the numbers needed to form the ratio. The length of the swimming pool is 50 ft long. We need to find the perimeter. 2(50+35)
2*85
170.
So, the perimeter is 170 ft. Now we need to form the ratio. Length is first, then the perimeter.
50:170 is your ratio, but we can simplify it to 5:17. Hope this helped!

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2 years ago

12 workers build a wall in 10hours. How long do 5 workers build a wall

snow_lady [41]

Answer:

24 hours

Step-by-step explanation:

If 12 workers take 10 hours to build a wall, assuming they build at the same rate, it would take one worker 120 hours to build a wall.

By this logic, it would take 120/5 or 24 hours for 5 workers to build a wall

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2 years ago

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