Answer:

Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form
or
Let
x -----> the amount of weight
y ----- the amount a spring will stretch
we know that
For x=80 lb, y=2.1 in
<em>Find the value of k (constant of proportionality)</em>

substitute the values

The linear equation is

How far will it stretch when 40 pounds is attached?
For x=40 lb
substitute the value of x in the linear equation and solve for y

- 5 1/4 <span>÷ 2 3/4 =
= - 21/4 </span><span>÷ 11/4
= - 21/4 * 4/11
= - 21/11
= - 1 10/11
</span>
Answer:
870
Step-by-step explanation:
$435 + $395 = $830
$830 + $10 = $840
$2 x 15 = $30
$840 + $30 = $870
I’m not to sure my my guess is zero because it is not going up or down
Answer:
5^9
Step-by-step explanation: