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Focus on question 14 and 16
Topic: Multiplying and dividing fractions

14  1/5

16.  1330 km

Step-by-step explanation:

 16.  The driving distance is 570 km from W to R

The driving distance from W to C is 2 1/3 times W to R

2 1/3 * 570

Change to an improper fraction

7/3 * 570

1330

The driving distance is 1330 km

14.  3/5ths are girls

1/3 of the girls walk

3/5 * 1/3 = 1/5

1/5 of the class is girls who walk

14. 1/5

16. 1330 km

Step-by-step explanation:

14. 1/5

P(girl) = 3/5. This information is clear.

P(walk | girl) = 1/3. The | sign means "given;" given that the person is a girl, we know that there is a 1/3 chance she walks to school.

This question wants to know what proportion of the class is both a girl and walks to school; because of the use of the word and, we know this is the intersection of two events, symbolized ⋂.

The formula for intersection is P(A ⋂ B) = P(A) * P(A|B).

P(girl ⋂ walk) = P(girl) * P(walk | girl)

                      = 3/5 * 1/3 = 3/15 = 1/5

16. 1330 km

So let's represent these with variables.

From Winnipeg to Regina is 570 km, so WR = 570.

From Winnipeg to Calgary is 2 1/3 times WR, so WC = 2 1/3 * WR.

We can just use substitution to combine these two equations.

WC = 2 1/3 * WR

WC = 2 1/3 * 570 = 1330 km

the diameter is 16 cm. are you a teacher?

step-by-step explanation:

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this