He has 20 quarters, 15 dimes and 10 pennies.
Step-by-step explanation:
Let,
Quarters = x
Dimes = y
Pennies = z
We know that,
A quarter is 25 cents, dime is 10 cents and penny is 1 cent.
Total amount = $6.60 = 6.60*100 = 660 cents
According to given statement;
25x+10y+z=660 Eqn 1
x=2z Eqn 2
y=z+5 Eqn 3
Putting these values of x and y in Eqn 1
Dividing both sides by 61;
Putting z=10 in Eqn 2
Putting z=10 in Eqn 3
He has 20 quarters, 15 dimes and 10 pennies.
Keywords: linear equations, substitution method
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Answer:
4/3 =a
Step-by-step explanation:
10 − 3(2a − 1) = 3a + 1
Distribute
10 -6a +3 = 3a+1
Combine like terms
13 -6a = 3a+1
Add 6a to each side
13-6a+6a = 3a+6a +1
13 = 9a+1
Subtract 1 from each side
13-1 = 9a+1-1
12 = 9a
Divide by 9
12/9 = 9a/9
4/3 =a
The probability of picking blue is stated as 2/10 which can be reduced to 1/5
multiply the number of times they pick a marble ( shown as 200) by the probability of picking a blue one ( 1/5)
200 x 1/5 = 200 / 5 = 40
Quinn can expect to pick blue 40 times
The temperature was warmest at 9:00 pm, as 97 degrees Fahrenheit is higher than 82 and 88 degrees Fahrenheit.
Step-by-step explanation:
Let’s set up a proportion.
6/20=x\100 (percent is always out of 100. set parts and wholes equal)
x=30
30 percent of the people are from out of state.
