Kyle has a total of 16 coins in his pocket. All the coins are nickels or quarters, and they have a total value of $2.20. How man
y nickels does Kyle have?
7 nickels
8 nickels
9 nickels
11 nickels
2 answers:
Answer:
9 nickels
Step-by-step explanation:
He doesn't have that many coins, and there are 4 choices, so let's use the guess method.
Try 7 nickels.
7 * $0.05 = $0.35
16 - 7 = 9
9 * $0.25 = $2.25
The quarters alone are worth more than $2.20, so this is not the answer. We need more nickels and fewer quarters.
Try 11 nickels.
11 * $0.05 = $0.55
16 - 11 = 5
5 * $0.25 = $1.25
$0.55 + $1.25 = $1.80
The coins are worth too little. We need fewer nickels and more quarters.
Try 9 nickels.
9 * $0.05 = $0.45
16 - 9 = 7
7 * $0.25 = $1.75
$0.45 + $1.75 = $2.20
The coins are worth the correct amount.
Answer: 9 nickels
Answer:
9 nickels
Step-by-step explanation:
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In inequalities normal athematic are used the only difference is that you flip the operator when dividing over -1 or taking inverse
Answer:
Step-by-step explanation: There are four steps
Subsitute -4y for x
-4y+6y=18
2y=18
divide both sides by 2
y=9
sub back
x=-4y
x=-4(9)
x=-36
(x,y)
(9,-36)
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