A 4 x 3w B 5 - 4r C 8 ÷÷ 4p D 4 ÷÷ 2y
1 answer:
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Answer:
110 test
Step-by-step explanation:
Let
x ----> the number of packet of 10 test
y ----> the total cost
we know that
The number of packet of 10 test purchase multiplied by $11 plus the enrollment fee of $30 must be equal to $151
so
The linear equation that represent this scenario is
we have
substitute
Solve for x
subtract 30 both sides
Divide by 11 both sides
The number of packets purchase was 11
To find out the number of test, multiply the number of packets by 10
Answer:120cm
Step-by-step explanation:
10cm x 12cm=120cm