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Maslowich
3 years ago
8

A test is worth 60 points. Multiple-choice questions are worth 2 points, and

Mathematics
1 answer:
Effectus [21]3 years ago
7 0

Answer:

C. The number of multiple-choice questions plus the number of

short-answer questions is 15.

Step-by-step explanation:

This question can be solved using a system of equations.

I am going to say that:

x is the number of multiple-choice questions

y is the number of short-answer questions.

Multiple-choice questions are worth 2 points, and short-answer questions are worth 5 points.

This means that:

2x + 5y = 60

The test has 15 questions.

This means that:

x + y = 15.

Which means that option C is the correct answer.

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Mina asked four friends to explain how each one solved the expression . Here are their explanations:
Fed [463]

Ok let me answer this question by finding it's solution first.

The two numbers are 15.75 and 176.3

First we will compare the numbers.

1. A=176.3

2. B=15.75

one's place of A is greater than once place of B.

tens place of A is greater than tens place of B.

Hundred place of A is greater than hundred place of B.

So, A>B

So  we will subtract 15.75 from 176.3.

176.30 -15.75=

176.30     ----A

- 1 5.75     ----B

Hundreths place of A - Hundreths place of B =  0-5=10-5=5

Tenth place of A  - Tenth place of B =12-7=5

ones place of A - ones place of B=5-5=0

Tens place of A - Tens place of B =7-1=6

Leave 1 as it is.

So the solution is 160.55

Now coming back to the Explanation by four friends of Mina

Ivy’s explanation: I lined up the numbers to subtract. [As i have explained above you have to find first which number is bigger , then first you must write bigger number then if the bigger number has  only tenth place value mark hundred place as 0 and then start subtracting from Right to left.]

Hannah’s explanation: I lined up the two decimals according to place value. I put a 0 in the hundredths place to make it easier for me to subtract.   [ As i said above first you have to choose which number is bigger then you can proceed as you have done.]

Jose’s explanation: I lined up the two decimals according to place value   [ Jose you have made same mistake, first find which number is bigger then line up the number according to their place value, write the bigger number first then start subtracting as i have explained above.]

An’s explanation: I counted up from 15.75 to 176.3 to find the difference. I underlined each number I added on each line.   [ Too lengthy and very time consuming. Use the method as i have explined above.]




6 0
3 years ago
Work out 30 – 3 + 7 x 2
strojnjashka [21]
The correct answer is 41
7 0
3 years ago
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Mrs. Kwan
9966 [12]

One and a half gallons. (1.5 gallons)

3 0
4 years ago
The cost of a babysitting service on a cruise is $10for the first hour and $12 for each addition hour. If the total cost of baby
lana66690 [7]

Answer:5hours

Step-by-step explanation:

58-10 = 48 dollars remain after the first hour

48/12 = 4 hours after the first hour

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3 0
3 years ago
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Sebastian programs his calculator to cvaluate a linear
jonny [76]

Answer: y = 3/4x

Step-by-step explanation:

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