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3241004551 [841]
2 years ago
8

Leslie took a total of 40 quizzes over the course of 5 weeks. After attending 7 weeks of school this quarter, how many quizzes w

ill Leslie have taken in total? Solve using unit rates.
Mathematics
1 answer:
kow [346]2 years ago
5 0

Answer:

56 quizzes

Step-by-step explanation:

40 quizzes = 5 weeks

To find the unit rate of quizzes / week, we can divide both sides by 5

40/5 quizzes = 5/5 weeks

8 quizzes = 1 week

Multiply both sides by 7 to find the amount of quizzes in 7 weeks

8 * 7 quizzes = 1 * 7 weeks

56 quizzes = 7 weeks

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Answer:

C

Step-by-step explanation:

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Option C, or 4/5 x 3/2, is also equal to 12/10

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3 years ago
A small auditorium has 10 rows of seats. There are 12 seats in the row and 16 seats in the second row the number of seats in a r
guapka [62]

This problem can be solved through simple arithmetic progression

Let

a1 = the first term of the sequence

a(n) = the nth term of the sequence

n = number of terms

d = common difference

Sn = sum of all terms

 

given

a1 = 12

a2 = 16

n = 10

 

d = 16 -12 = 4

@n = 10

a(n) = a1 + (n-1)d

a(10) = 12 + (9)4

a(10) = 48 seats

 

Sn = (n/2) * (a1 + a(10))

Sn = 5* (12 + 48)

Sn = 300 seats

 

Therefore the total number of seats is 300.

 

 

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3 years ago
Factorise 2a – 4a3 + 6abc
Viefleur [7K]
The answer for this will be

2a(1-2a ²+3bc)
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Step-by-step explanation:

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Step-by-step explanation:

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