Answer:
Lamar wrapped 7 gifts
Step-by-step explanation:
Lamar wrapped = g
then Nicole wrapped = 4g
then 4 g = 28
g =
= 7
∵Therefore, Lamar wrapped 7 gifts
Answer:
AD = 15 cm , BD = 3 cm
Step-by-step explanation:
Δ ABC is similar to Δ ADE ( by the AA postulate )
then the ratios of corresponding sides are in proportion, that is
=
( substitute values )
=
( cross- multiply )
8 × AD = 12 × 10 = 120 ( divide both sides by 8 )
AD = 15 cm
AB + BD = AD , that is
12 + BD = 15 ( subtract 12 from both sides )
BD = 3 cm


-3 is our y-intercept is plotted on both graphs yet one is negative and the other is positive and

Is our slope and is positive and the graph that is positive is the first graph.
we have
the equation of the line is 
the points are

<u>Method 1</u>
we know that
A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form
or 
In this problem we have a direct variation
The constant of proportionality k is equal to the slope of the line

so

therefore
<u>the answer is</u>
the slope of the line is equal to

<u>Method 2</u>
we know that
the formula to calculate the slope between two points is equal to

we have

substitute in the formula



therefore
<u>the answer is</u>
the slope of the line is equal to

We can present these coordinates in tabulate form
x y
-1 0.8
0 2
1 5
2 12.5
We work the multiplicative rate of change by finding out the increase ratio
12.5 ÷ 5 = 2.5
5 ÷ 2 = 2.5
2 ÷ 0.8 = 2.5
The ratio results in the same ratio every time, which is 2.5
The multiplicative rate of change = 2.5