Me !

the temperature has been going down at a constant rate. in 4 hours it went down 12 degrees. which expression best shows the temperature change each hour?

a.−12 × -4

b.12×4

c.−12÷4

d.12÷4
(sorry i already did myself! but you can still answer! )

−12 ÷ 4 expression best shows the temperature change each hour. Hence Option C is correct

Solution:

Given that, the temperature has been going down at a constant rate.

In 4 hours it went down by 12 degrees.

Now, we have to choose the correct option which best describes about the change in temperature for each hour.

Now, we know that, 12 degrees decreased in 4 hours.

Then, number of degrees decreased in one hour =

Number of degrees changed in one hour =

Because the temperature is decreasing we have to add a (-) symbol before the change in degrees.

So, now, number of degrees changed in 1 hour =

Hence, the correct option is option c.

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).

that one look

step-by-step explanation: