4 years ago

Fraction multiplying by fractions

1 answer:

6 0

2 3
--- * ? = ---
9 15

We want to find the fraction represented by " ? " above.

We want to isolate the " ? " so mult both sides by the inverse of (2/9):

(9/2)(2/9) f = (3/15)(9/2) = 27/30 = 9/10

so the unknown fraction is 9/10.

Check your work: Is (2/9)(9/10) = 3/15? Is 1/5 = 1/5? YES.

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What is the slope of the line through (3, 2) and (-3,4)?

alukav5142 [94]

Step-by-step explanation:

the slope of a line is the ratio y/x.

that means, when going from one point to the other, how many units y changes, when x changes a certain number of units.

the sign indicates the direction of the change (+ for larger and - for smaller).

so, here x changes by 6 units (from -3 to 3), and y changes by -2 units (from 4 to 2).

therefore, the slope is

-2/6 = -1/3

8 0

2 years ago