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3 years ago

15

Johnny has a jar of coins that has quarters and dimes. There are 57 coins in the jar tha have a total of $7.95. How many dimes a

re in the jar?

1 answer:

Leya [2.2K]3 years ago

8 0

Answer:

37 dimes

Step-by-step explanation:

i was experimenting. 17 quarters and 37 dimes. 17 times .25 is 4.25. 37 times .10 is 3.70. add them and it's correct.

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Mike is driving a boat at 12 mph and is increasing his speed by 0.2 mph each second. Hank is driving a boat at 26.4 mph and is d

VLD [36.1K]

Answer: After 16 seconds the boats will be traveling the same speed.

Step-by-step explanation:

Given: Mike is driving a boat at 12 mph and is increasing his speed by 0.2 mph each second.

Mike's spewed after x seconds = 12 + 0.2x

Hank is driving a boat at 26.4 mph and is decreasing his speed by 0.7 mph each second.

Hank's speed after x seconds = 26.4 -0.7 x

As per given,

12 + 0.2x = 26.4 -0.7 x

Subtract 12 from both sides

0.2x= 26.4-12-0.7x

⇒ 0.2x= 14.4-0.7x

Add 0.7xn on both sides , we get

0.2x+0.7x= 14.4

⇒ 0.9x = 14.4

Multiply 10 on both sides, we get

9x=144

Divide both sides by 9 , we get x= 16

Hence, after 16 seconds the boats will be traveling the same speed.

7 0

3 years ago

Which expression is equivalent to 1 over 5 m − 20?

laiz [17]

1

-----------

5m -20

factor out a 5 in the denominator

1

-----------

5 (m -4)

Choice A

7 0

3 years ago

Stays rope is 4 feet shorter than 3 times the length of Travis rope.stacys rope is 23 feet long.write an equation and solve it

oksian1 [2.3K]

T = 3s - 4
T = 3(23) - 4
T = 69 - 4
T = 65

3 0

3 years ago

Pls help !!!!!!!!!!!!!!!!!!

Mashutka [201]

Maybe the answer is B

4 0

3 years ago

Can someone walk me through this?

Diano4ka-milaya [45]

So you can set up proportion.

$\dfrac{7.5\ \text m}{76^\circ} = \dfrac C{360^\circ}$

Here, you need to solve for C.

You can do that by multiple both sides by 360 and then you should get $360^\circ\cdot\dfrac{7.5\ \text m}{76^\circ} = C \approx \boxed{35.526\ \text m}$

Hope this helps.

3 0

3 years ago