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exis [7]
3 years ago
7

Solve for the indicated variable.  for r

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
8 0
What is the indicated variable
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Which is the sixth sequence: an=1/125 (5n-1)
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1. Distribute
1/125 x 5n - 1/125
2. Simplify 1/125 x 5n to n/25
n/25 - 1/125
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4 years ago
Which Expression is equivalent to 5−3(4−1)?
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I believe the answer would be B, good luck 
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3 years ago
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at a sale shirts were sold for $15 each this price was 80% of their original price. What was the original price
Oliga [24]
15\x and 80\100
15 times 100=1500
1500=8x
then you divide 1500 by 80 so x is by itself
x=18.75







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4 years ago
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2. Mr. Ellis runs an after-school program for nine- and ten-year-olds. Each day the children participate in an
MatroZZZ [7]

Answer:

See explanation

Step-by-step explanation:

Factorize numbers 42 and 56:

42=2\cdot 3\cdot 7\\ \\56=2\cdot 2\cdot 2\cdot 7

These two numbers have common factors 2 and 7. So,

A. Mr. Ellis can divide the group into

  • 1 team = 42 ten-year-olds and 56 nine-year-olds (actually this is not dividing only completing 1 team);
  • 2 teams = 21 ten=year-olds and 28 nine-year-olds in each team;
  • 7 teams = 6 ten-year-olds and 8 nine-year-olds in each team;
  • 14 teams = 3 ten-year-olds and 4 nine-year-olds in each team.

So, there are 3 different ways to divide the group of students into teams.

B. The greatest number of teams Mr. Ellis can make so each team has the same number of 9-year-olds and the same number of 10-year-olds is 14 teams.

C. If Mr. Ellis gives a snack to each winner, then he is interested to give the smallest number of snacks, the smallest number of snacks will be when the number of students in the team is the smallest, the smallest number of students will be when the greatest number of teams are created.

5 0
3 years ago
Which summation formula represents the series below?
Ber [7]

Answer:

Step-by-step explanation:

The summation formula (  arithmetic sequence when the first terme is : A1 = 13

and the coomo diff is d= -4

Sn = n/2(A1 +An)

An = A1+(n-1)d

An = 13 +(n-1)(-4)

An = -4n +17

Sn = n/2(13+17-4n) = n/2(30-4n)

Sn = -2n² +15n

in this exercice : n =4      S4 = -2(4)² +15(4) = -32+60 = 28

verify : 13 + 9 + 5 + 1 =28   ......right

8 0
4 years ago
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