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muminat
2 years ago
7

Mary read 2/5 of a book in 15 minutes. How much of the book can she read per hour? book per hour.​

Mathematics
2 answers:
Yuliya22 [10]2 years ago
8 0

Answer:½((n/2) – ½) – ½ = 10

½(n/2) – ¼ - ½ = 10 (using the distributive property)

¼n – ¼ - ½ = 10 (multiplying to eliminate the parentheses)

¼n – ¾ = 10 (combining like terms)

¼n = 10¾ (adding ¾ to both sides of the equation)

n = 43 (dividing both sides of the equation by ¼)

Step-by-step explanation:

Let’s start by writing Josie’s first step as an expression. Dividing n by 2, then subtracting ½ from

the result would be (n/2) – ½. If we build on this expression with the information in Josie’s

second step, we get ½((n/2) – ½) – ½. Knowing the final result is 10, we can set up the equation

below, and solve for n as follows: hope this helps

Vika [28.1K]2 years ago
3 0

Answer:

Mary can read 8 pages in an hour

Step-by-step explanation:

60/15 = 4

2/5 x 4

2/5 x 20/5

40/5 = 8

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