We can model this situation.

Raina received a total of 83 calls
First evening she received 7 more than the third so let x = third and since we know she received 7 more we know to add 7 to the third so (x + 7)

Second evening she received 2 times as many as the third so 2 time third, which x is the third so (2 times x) or we could say 2x

Third evening = x

So now lets solve for x and then we can find how many she received each evening.

Our Model: (x + 7) + 2x + x = 83
(x + 7) + 2x + x = 83
x + 7 + 2x + x = 83
x + 2x + x + 7 = 83
4x + 7 = 83
4x + 7 - 7 = 83 -7
4x = 76
4x / 4 = 76 / 4
x = 19

First evening:
19 + 7 = 26 calls
Second evening
2 times 19 = 38
Third evening
19

Check our answer:
26 + 38 + 19 = 83

7 0

3 years ago

Any intelligent people want to tell me how the heck I do this

torisob [31]

Answer:

I'm pretty sure you are supposed to add the exponents.

Step-by-step explanation:

3 0

4 years ago

The population of a town can be modeled by the regression equation y = 18,000(1.04x). Which is the best prediction for the popul

joja [24]

Plugging in the year 30 would give y=18,000(1.04(30)) which would equal 561,000 as the population.