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PolarNik [594]
3 years ago
14

A student took 60 minutes to answer a combination of 20 multiple choice and extended response choice questions she took two minu

tes to anwer each multiple choice and 6 minutes to anwaer each extended response.
A) write a system of equations to model the relationship between the number of multiple choice questions M and number of extended response questions R
B) how many of each type of question was on the test
Mathematics
2 answers:
Ray Of Light [21]3 years ago
8 0
20 = m + r
60 = 2m + 6r

Using substitution, you would subtract R from both sides in the first equation.

20 - r = m

Substitute (20 - r) for m in the second equation.

60 = 2(20 - r) + 6r

Distribute the 2

60 = 40 - 2r +6r

Combine like terms.

20 = 4r

Divide both sides by 4

5 = r

Now put R back into the first equation.

20 - 5 = m

15 = m

There were 15 multiple choice and 5 extended response questions.
frez [133]3 years ago
4 0
The average rate of change of g(x) between x = 4 and x = 7 is . Which statement must be true?

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Answer:

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Step-by-step explanation:

5 0
3 years ago
Can you Just pls Tell me the answer
andrew11 [14]

Answer:

1. Equation is x - 5 = 8

x = 13

2. Equation is 4x - 4 = 10

x = 3.5

3. Equation is x/4 = 8

x = 32

4. Equation is 5x = 10

x = 2

5. Equation is x - 5 / 2 = 14

x = 33

6. Equation is 4x / 5 = 10

x = 12.5

7. Equation is 2x - 10 = 8

x = 9

8. Equation is 3x + 6 / 3 = 10

x = 8

9. Equation x + 8 / 4 = 14

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8 0
3 years ago
-1y + 11= 20 what is the answer 3 or -3
yan [13]

Answer:

-9

Step-by-step explanation:

-1y+11=20

    -11= -11

-1y=20-11

-1y=9

-9

8 0
3 years ago
Read 2 more answers
A variety of two types of snack packs are delivered to a store. The box plots compare the number of calories in each snack pack
adelina 88 [10]

OPTIONS:

A. The interquartile range of the trail mix data is greater than the range of the cracker data.

B. The value 70 is an outlier in the trail mix data.

C. The upper quartile of the trail mix data is equal to the maximum value of the cracker data.

D. The number of calories in the packs of trail mix have a greater variation than the number of calories in the packs of crackers.

Answer:

D.

Step-by-step explanation:

With the given information about how the box plot looks like, let's examine each option to see if they are true or not.

<u><em>Option A: "The interquartile range of the trail mix data is greater than the range of the cracker data."</em></u>

The interquartile range of trail mix data = 105 - 90 = 15

Range of cracker data = 100 - 70 = 30

Option A is NOT TRUE.

<u><em>Option B: "The value 70 is an outlier in the trail mix data.</em></u>"

This is NOT TRUE. There are not outliers as 70 is the minimum value if the ranges of the data set for the trail mix.

<em><u>Option C: "The upper quartile of the trail mix data is equal to the maximum value of the cracker data."</u></em>

Upper quartile of the trail mix data = 105

Max value of cracker data = 100

This statement is NOT TRUE.

<em><u>Option D: "The number of calories in the packs of trail mix have a greater variation than the number of calories in the packs of crackers."</u></em>

The greater the range value, the greater the variation. Thus,

Range value of the trail mix data = 115 - 70 = 45

Range value of the cracker data = 100 - 70 = 30

This is statement is correct because trail mix data have a greater range value, hence, it has a greater variation in the number of calories.

6 0
4 years ago
Read 2 more answers
Which equation represents exponential growth?
Blababa [14]

Growth means a base for exponentiation bigger than 1  (in absolute value), otherwise it's decay.

Only the first choice has a base biggerthan 1.  The last choice is equivalent to f(x)=5 ( \frac 1 6)^x so has a base less than 1.

Answer: A

8 0
3 years ago
Read 2 more answers
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