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Molodets [167]
3 years ago
11

At a high school, students can choose between three art electives, four history electives, and five computer electives. Each stu

dent can choose two electives.
Which expression represents the probability that a student chooses an art elective and a history elective?

Mathematics
2 answers:
denpristay [2]3 years ago
5 0
Am not sure but I think is C
sergejj [24]3 years ago
3 0

Answer:

C. (3C1)(4C1)/12C2

on edge

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Step-by-step explanation:

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Lin rode a bike 20 miles in 150 minutes. If she rode at a constant speed, how far did she ride in 15 minutes? How long did it ta
coldgirl [10]

Hey there! :)

Answer:

First part: 2 miles.

Second part: 45 minutes

Third part: 8 mph.

Step-by-step explanation:

We can divide this question into 3 parts.

Begin by solving for the distance traveled after 15 minutes by creating a ratio:

\frac{20 mi}{150min}  = \frac{x}{15 min}

Cross multiply:

20 · 15 = 150 · x

300 = 150x

300/150 = 150x/150

x = 2 miles.

2nd part: How long it took her to ride 6 miles.

Set up another ratio similar to the one used before:

\frac{20 mi}{150min}  = \frac{6mi}{x min}

Cross multiply:

20 · x = 6 · 150

20x = 900

20x/20 = 900/20

x = 45 minutes.

3rd part:

For this part, we will need to convert from minutes to hours.

\frac{20 mi}{150 min}* \frac{60 min}{1 hr} = \frac{1200mi}{150hr}   = 8 mi/h

Therefore, her speed is 8 mph.

5 0
2 years ago
Which of the following is a terminating decimal? A.10.3 never ending B.10 with the check mark C. 10.101 D.100.6 never ending
kirill [66]
C; terminating means it stops at a definite point
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kirza4 [7]

Answer:

3/7

Step-by-step explanation:

12 ÷ 4

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