Answer: -3
Step-by-step explanation:
-4 +
can be written as
x
which is the same as 2
Also , can be written as
x
, which is the same as 5
Substituting into the main question , we have
-4 (2 ) + 5
= -8 + 5
= -3
The temperature dropped 12f in 8 hours if the final temperature was -7f what was the starting temperature
1 answer:
You might be interested in
Answer:
The constant of proportionality is
Step-by-step explanation:
The constant of proportionality is the ratio between two directly proportional quantities
- If x and y are in directly proportion, then
, where k is the constant of proportionality.
- The direct proportion can be represented by a line whose equation is y = kx, where k is the slope of the line.
<em>To find the constant of proportionality from the given graph choose a point on the line and substitute x and y in the equation of the proportionality by the coordinates of the point.</em>
∵ Point (4, 18) lies on the line
∴ x = 4, y = 18
∵ The equation is y = kx
→ Substitute x by 4 and y by 18
∴ 18 = k(4)
∴ 18 = 4k
→ Divide both sides by 4 to find k
∴
∴
→ Simplify the fraction by dividing up and down by 2
∴
∴ The constant of proportionality is