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Vera_Pavlovna [14]
2 years ago
6

Jenny's aunt wants to buy a mix of almonds and pecans as a birthday gift for Jenny. She wants to buy 6 pounds of nuts in total a

nd spend $50. If almonds cost $7 per pound and pecans cost $9 per pound, how many pounds of pecans should Jenny's aunt buy?
Mathematics
2 answers:
Lady bird [3.3K]2 years ago
8 0

Answer: Jenny's aunt should buy 4 pounds of pecans.

Step-by-step explanation:

Let x represent the number of pounds of almonds that Jenny's aunt should buy.

Let y represent the number of pounds of pecans that Jenny's aunt should buy.

She wants to buy 6 pounds of nuts. This means that

x + y = 6

If almonds cost $7 per pound and pecans cost $9 per pound and she wants to spend $50, it means that

7x + 9y = 50- - - - - - - - - - - - -1

Substituting x = 6 - y into equation 1, it becomes

7(6 - y) + 9y = 50

42 - 7y + 9y = 50

- 7y + 9y = 50 - 42

2y = 8

y = 8/2

y = 4

x = 6 - y = 6 - 4

x = 2

adell [148]2 years ago
5 0

Answer:

She should buy 4 pounds of pecans.

Step-by-step explanation:

9*4=36

$50-$36=$14

14/7=2pounds of almonds

2+4=6pounds of nut in total

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Find the sum of the arithmetic sequence 1, 3, 5, 7, … , 99.
bezimeni [28]

The sum of the arithmetic sequence 1, 3, 5, 7, … , 99 is 2525

<h3>What is Sequence?</h3>

Sequence is an enumerated collection of objects in which repetitions are allowed and order matters.

Given sequence is 1, 3, 5, 7, … , 99.

It is a arithmetic sequence, the difference between two consecutive terms will be same

d=3-1=2

first term a=1

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We need to find 99 is which term in the sequence

Aₙ = a + ( n - 1 ) d

99=1+(n-1)2

99=1+2n-2

99=2n-1

100=2n

Divide both sides by 2

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Now we need to find the sum of 50 terms

Sₙ=n/2(l+d)

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=25(101)

=2525

Hence, the sum of the arithmetic sequence 1, 3, 5, 7, … , 99 is 2525

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