Let d = number of dimes, q = number of quarters
<span>Sally has 20 coins in her piggy bank, so </span>
<span>d + q = 20 </span>
<span>The total amount of money is $3.05. </span>
<span>Use the value of each coin multiplied by its number to get total value </span>
<span>.10d + .25q = 3.05 </span>
<span>multiply everything by 100 to clear the decimal places </span>
<span>10d + 25q = 305 and </span>
<span>d + q = 20 </span>
<span>solve the second equation above in terms of either d or q - lets do d </span>
<span>d = 20 - q </span>
<span>sub that into the first equation </span>
<span>10d + 25q = 305 </span>
<span>10(20 - q) + 25q = 305 </span>
<span>200 - 10q + 25q = 305 </span>
<span>15q = 105 </span>
<span>q = 105/15 = 7 </span>
<span>and from above </span>
<span>d = 20 - q = 20 - 7 = 13 </span>
<span>so, there are 13 dimes and 7 quarters </span>
<span>verify with orig problem </span>
<span>13 + 7 = 20, OK, and $1.30 + $1.75 = $3.05
</span>
Answer:
Give me and example
Step-by-step explanation:
Answer:
The answer is $2750. Which is the difference in the amount of interest Emma would have to pay for these two loans
Step-by-step explanation:
Interest=( P× r × t)/100
60 months is converted to 5years(60/12=5)
Interest= (25000 × 5 × 5) /100
= $6250
72months is converted to 6 years(72/12=6 Years)
Interest=( P× r × t)/100
= (25000 × 6 × 6)/100
=$ 9000
The difference in the interest= $9000- $6250
= $ 2750
Answer:
The greatest common factor is 10
Step-by-step explanation:
Once you factor it out, you have :
10(x^2+5)
Answer:
6 units
Step-by-step explanation:
could each square from E to D
