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3 years ago

5

Eva's coin purse contained 10 more dimes than nickels. The total value of the nickels and dimes was $10. How many coins of each

type were there?

1 answer:

salantis [7]3 years ago

7 0

Answer:

60 nickels

70 dimes

Step-by-step explanation:

convert $10 to cents

$10 = 1000 pennies

1000 = 5x + 10 (x+10)

1000 = 15x + 100

900 = 15x

x = 60

60 nickels

70 dimes

check to be sure this adds up to $10

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Blank percent of 50 shirts

Dmitrij [34]

The answer is 10 because 5 10 15 20 25 30 35 40 45 50

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3 years ago

11th grade geometry:

Aliun [14]

Answer:

<em>The perimeter is 72 units and the area is 149 square units.</em>

Step-by-step explanation:

$\triangle SBA$ has coordinates $S(15,-8),B(-2,21)$ and $A(0,0)$

Using the distance formula.........

Length of side $SB = \sqrt{(15+2)^2+(-8-21)^2}= \sqrt{17^2+(-29)^2}= \sqrt{1130}$

Length of side $BA= \sqrt{(-2)^2+(21)^2}= \sqrt{445}$

Length of side $AS =\sqrt{(15)^2+(-8)^2}=\sqrt{289}=17$

So, the perimeter of the triangle will be: $(SB+BA+AS)= \sqrt{1130}+ \sqrt{445}+17 =71.71... \approx 72$ units. <em>(Rounded to the nearest unit)</em>

The height of the triangle for the corresponding base $SB$ is 8.89 units.

<u>Formula for the Area of triangle</u>, $A= \frac{1}{2}(base\times height)$

So, the area of the $\triangle SBA$ will be: $\frac{1}{2}(\sqrt{1130}\times 8.89)= 149.42... \approx 149$ square units. <em>(Rounded to the nearest unit)</em>

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3 years ago

11.4÷35.7 answer estimated<br>(15 points)(brainliest included)<br>(incorrect answer=report)

Gre4nikov [31]

Answer:

0.31932773109

Step-by-step explanation:

Set it up
Move the decimal point one place to the right for both of them
Then, do the long division
Keep adding zeros at the end until you have your answer
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2 years ago

Need help pronto! Will give brainliest!

irina1246 [14]

156°

D is a 24° angle, and is placed in a 90° angle, so 90-24=66

C is a right angle, so 90+66=156°

Hope this helped!

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2 years ago

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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.

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3 years ago

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