If x varies directly with y and x = 6 when y = 15, find x when y= 20.
1 answer:
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Answer:
6
9
6.48
Step-by-step explanation:
this is the easiest way to solve for percentage:
Where all the percents (except 100) would go in part
and the whole number would go in whole
Then multiply 24 × 25 ÷ 100 = 6
Multiply 60 by 25 then divided by 100 = 9
Then for the last one 9 is what percent of 72
all we have to do is multiply 9 and then convert 72 into a decimal (0.72)
Then 9 × 0.72 = 6.48
Answer:
Choice B. .
Step-by-step explanation:
Start by finding the slope of this line. Let and
represent two distinct points on a line on a Cartesian Plane. (That is,
.) The slope of this line would be:
.
For the line in this question:
,
;
.
Indeed, . The slope of this line would thus be
, which is equal to
.
On a Cartesian Plane, the point-slope form of a line that has a slope of and includes the point
can be written as:
.
(Note the minus signs in this form.)
For the line in this question, . There are two equivalent expressions for its point-slope form:
- Using the first point,
. This equation is equivalent to
.
- Using the second point,
.