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2 years ago

Find the value of x that makes each equation below true.

Mathematics

1 answer:

adelina 88 [10]2 years ago

3 0

Answer:

a)5, b) -2.5, c) -15,d)-2,e)-10

Step-by-step explanation:

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Equivalent ratio of 64:60

Snowcat [4.5K]

An equivalent ratio of 64:60 is 16:15.

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I spent $10 dollars out $25 what is percent I spent

Lina20 [59]

$\text {Percentage spent = } \dfrac{10}{25} \times 100$

$\text {Percentage spent = } \dfrac{2}{5} \times 100$

$\text {Percentage spent = } 40 \%$

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2 years ago

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Suppose it takes 2 1/2 h to drive from your house to the lake at 48 mi/h. How long will your return trip take at 40 mi/h?

Y_Kistochka [10]

Answer

The distance from the house to the lake is (2.5 hr)*(48 mi/hr) = 120 miles. The rerurn trip would take (120 mi)/(40 mi/hr) = 3 hours. Distance equals rate times time, so the distance to the lake is 2 1/2 hours times 48 miles per hour.

I hope this helps

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2 years ago

How do you solve: 4/10y+28=0

Bezzdna [24]

Answer:

Step-by-step explanation:

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2 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: $\frac{dR}{dt}=2 \times \frac{dr}{dt}$

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3 years ago

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