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Margarita [4]
3 years ago
8

Jennifer has a pocketful of change all in nickels and quarters. There are 11 coins with a total value of $1.15. Which system of

equations can you use to find the number of each type of coin?
n + q = 11
n + q = 1.15

n + q = 11
5n+25q= 1.15

5n +25q =11
n + q = 1.15

n + q = 11
0.05n + 0.25q = 1.15
Mathematics
1 answer:
anygoal [31]3 years ago
7 0

Answer:

n + q = 11

0.05n + 0.25q = 1.15

Step-by-step explanation:

Hi, to answer this question we have to write a system of equations:

n = number of nickel coins

q = number of quarter coins

Since there are 11 coins, the sum of the number of nickels and quarters must be 11:

n+q =11

Since:

1 nickel = $0.05

1 quarter = $0.25

The total value (1.15) must be equal to the product of the number of nickels (n) and the value of each nickel in dollars (0.05); plus the product of the number of quarters (q) and the value of each quarter in dollars (0.25)

0.05n + 0.25q = 1.15

The system is ;

n + q = 11  

0.05n + 0.25q = 1.15

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jolli1 [7]

Answer:

No, because there is just as high of a possibility that the other is biased too.

8 0
3 years ago
For which sample size (n) and sample proportion (p) can a normal curve be
Nonamiya [84]

Answer:

Option c.

Step-by-step explanation:

Using the normal curve to approximate a sampling distribution:

For a sample size n and a proportion n, the normal curve can be used if:

np \geq 10 and n(1-p) \geq 10

Option a:

np = 35*0.8 = 28 > 10

n(1-p) = 35*0.2 = 7 < 10

So option a cannot be used.

Option b:

np = 65*0.9 = 58.5 > 10

n(1-p) = 65*0.1 = 6.5 < 10

So option b cannot be used.

Option c:

np = 65*0.8 = 52 > 10

n(1-p) = 65*0.2 = 13 > 10

So option c can be used, and is the answer

Option d:

np = 35*0.9 = 31.5 > 10

n(1-p) = 35*0.1 = 3.5 < 10

So option d cannot be used.

The answer is given by option c.

7 0
3 years ago
What is an equation that models the sequence 400, 200, 100, 50, ?
katrin [286]
N / 2

400 / 2 = 200
200 / 2 = 100
100 / 2 = 50
50 / 2 = 25
25 / 2 = 12.5
4 0
3 years ago
Marianna Martinez sells copy paper to local schools. She earns a 13 percent straight commission on all sales . In November her s
faltersainse [42]

Answer:

13%=0.13

28540*0.13=3710.2

8 0
3 years ago
Sammy buys 5 pounds of oranges for 7.50 at this rate how much would 8 pounds of oranges cost
Nadusha1986 [10]

The cost of 8 pounds of oranges based on the total cost of 5 pounds bought is 12.00

What is the cost for a pound of oranges?

The cost of a pound of oranges based on the rate at which 5 pounds were bought and 8 pounds would also be bought is determined as the amount paid for 5 pounds of oranges divided by the number of pounds of oranges bought

cost per pound of oranges=cost of 5 pounds/5 pounds

cost per pound of oranges=7.50/5

cost per pound of oranges=1.50

Based on the 1.50 per pound, the cost of 8 pounds is the cost per pound multiplied by 8 pounds

cost of 8 pounds of oranges=1.50*8pounds

cost of 8 pounds of oranges=12.00

Find out more about unit cost on:brainly.com/question/17430583

#SPJ1

3 0
2 years ago
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