Which pair of ratios forms a proportion? (4/5 10/13), (7/8 15/18), and (1/2 14/28)

½ and 14/28  

Step-by-step explanation:

If a pair of ratio forms a proportion, they are equal.

First pair of ratios:

4/5 =10/13

Convert to the least common denominator     (4 × 13)/65 = (10 × 5)/65

                                                                                  52/65 ≠ 50/65

The first pair of ratios is not a proportion.

Second pair of ratios:

7/8 =15/18

Convert to the least common denominator     (7 × 9)/72 = (15 × 4)/72

                                                                                 63/72 ≠ 60/72

The second pair of ratios is not a proportion.

Third pair of ratios:

½ =14/28

Convert to the least common denominator     (1 ×14)/28 = 14/28

                                                                                 14/28  = 14/28

                                                                                       ½ = 14/28

½ and 14/28 form a proportion.

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation:

66.666666667%

step-by-step explanation:

divide 150 by 100

divide 100 by 1.5

there you go!

decreased by 33.333333334%