What is the name for a mathematical phrase? O A. An inequality OB. An operation OC. An expression OD. An equation
1 answer:
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Answer:
A) The width is 12 cm; the average time is 3 minutes
Step-by-step explanation:
Cross multiply.
5 × y = 3 × 20
5y = 60
5y ÷ 5 = 60 ÷ 5
y = 12
The width is 12 cm. Moving onto the time.
Cross multiply.
4 × y = 12 × 1
4y = 12
4y ÷ 4 = 12 ÷ 4
y = 3
The time is 3 minutes.