Purse containing $3.20 in quarters and dimes has an all 20 coins find the number of each kind of coin

Mathematics

1 answer:

Kamila [148]3 years ago

5 0

Answer:

8quarters 12dimes

Step-by-step explanation:

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Adam currently runs about 20 miles per week, and he wants to increase his weekly mileage by 20%. How many miles will Adam run pe

WARRIOR [948]

Answer:

answer is24 miles per week :)

3 0

4 years ago

D+0.5=0.75<br><br> what is the answer put numbers

11111nata11111 [884]

Answer:

d = 0.25

Step-by-step explanation:

d + 0.5 = 0.75

-0.5 -0.5

d = 0.25

Hope this helps!!!

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3 years ago

Read 2 more answers

Assume that y varies inversely with x. If y= 4 when x = 4, find y when x = 2. <br> y=[ ? ]

ahrayia [7]

Answer:

Step-by-step explanation:

y inversely proportional to x

y=1k/x

4=k/4

k=4×4

k=16

to find y

y=16/4

y=4

4 0

3 years ago

Henry is making a corn grits recipe that calls for 1/4 cup of corn grits for every 1/2 cup of water. How much water will he need

Archy [21]

Method 1:

$\begin{array}{ccc}\dfrac{1}{4}\ \text{cup of corn}&-&\dfrac{1}{2}\ \text{cup of water}\\\\1\dfrac{1}{2}=\dfrac{3}{2}\ \text{cup of corn}&-&x\ \text{cup of water}\end{array}\qquad\text{cross multiply}\\\\\\\dfrac{1}{4}\cdot x=\dfrac{3}{2}\cdot\dfrac{1}{2}\\\\\dfrac{1}{4}x=\dfrac{3}{4}\qquad\text{multiply both sides by 4}\\\\\boxed{x=3}$

<h3>Answer: Henry will need 3 cups of water.</h3>

Method 2:

$\begin{matrix}\dfrac{1}{4}\ \text{cup of corn}&-&\dfrac{1}{2}\ \text{cup of water}&|\text{multiply both sides by 2}\\\\\dfrac{1}{2}\ \text{cup of corn}&-&1\ \text{cup of water}&|\text{multiply both sides by 2}\\\\1\ \text{cup of corn}&-&2\ \text{cup of water}&|\end{matrix}$

$\begin{matrix}\left(\dfrac{1}{2}+1\right)\ \text{cups of corn}&-&(1+2)\ \text{cups of water}\\\\1\dfrac{1}{2}\ \text{cups of corn}&-&3\ \text{cups of water}\end{matrix}$

<h3>Answer: Henry will need 3 cups of water.</h3>