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IRINA_888 [86]
3 years ago
8

Emma and Jon were writing a system of equations to describe the scenario below. Who do you believe correctly wrote the system of

equations. What was the other person’s error?
Mrs. Delgado purchased notebooks at 2 for $5 and pens

at $2 per package. She spent $19 for a total of 8 items.

How many notebooks and pens did she buy?
Mathematics
1 answer:
Rus_ich [418]3 years ago
4 0

Answer:

Mrs. Delgado purchased 6 notebooks and 2 packages of pens.

Step-by-step explanation:

Given that Mrs. Delgado purchased notebooks at 2 for $ 5 and pens at $ 2 per package, and she spent $ 19 for a total of 8 items, to determine how many notebooks and pens did she buy the following calculation must be performed:

5/2 = 2.5

8 x 2.5 + 0 x 2 = 20

6 x 2.5 + 2 x 2 = 19

Therefore, Mrs. Delgado purchased 6 notebooks and 2 packages of pens.

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145 degrees

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3 years ago
One group, which contains 28 dogs, averages 20.5 inches. Another group that contains 19 dogs, averages 32.1 inches.
gtnhenbr [62]

Answer:

The average height of poodles in your kennel is 25.19 inches.

Step-by-step explanation:

This is a weighed average problem.

To find the weighed average, we sum each value of the set multiplied by it's weight, and then we divide by the sum of the weights.

In this problem, we have that:

Average 20.5 inches has weight 28.

Average 32.1 inches has weight 19.

What is the average height of poodles in your kennel?

A = \frac{32.1*19 + 20.5*28}{19+28} = \frac{1183.9}{47} = 25.19

The average height of poodles in your kennel is 25.19 inches.

4 0
4 years ago
Help me plsssssss 2 1/2 x 3
expeople1 [14]
Exact form: 15/2
decimal form: 7.5
mixed number form: 7 1/2
5 0
3 years ago
How do i convert 30270000 into scientific notation
Anna [14]

Answer

3.027 × 10^7

I'm not the best at explaining but here is my attempt

You start with 30270000 you write the first number which is 3 then put a decimal and then put the rest of the numbers until the rest of the numbers are zeros..


3.027

Then put a × 10^

3.027 × 10^

And then the original number's digit count minus 1 is the number so 0270000 is 7 digits so the answer is

3.027 × 10^7


Sorry i'm horrible at explaining

4 0
3 years ago
Read 2 more answers
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