Gabe has already spent 2 minutes on the phone, and he expects to spend 1 more minute with every phone call he routes. in all, how many phone calls does gabe have to route to spend a total of 37 minutes on the phone?

he would make 12 phone calls

Step-by-step explanation

so he talks three minutes each time he is on the phone so divide 37 by 3 to get 12.33 with the .33 repeated but you have to round down to 12 because you have to have a whole number for the calls but even if the number was 12.79 you cant round up to 13 because the number has to be over 13

2nd, 4th and 5th

Step-by-step explanation:

remember :

+- = -

-+ = -

-- = +

++ = +

so, the first option has all signs of all terms as +. that is wrong, as we have -1 1/5

also the third option turns all signs to +. and is therefore wrong.

the second option makes the signs +, + and -. that is correct (like the original expression). as +- = -

the fourth option is just removing the brackets, which did not change anything about the signs, as there was a + in front of the original brackets. so, it is still the correct +, + and -.

the fifth option has the first two terms with -- signs, which makes them both +.

and the third one is +-, so it is -.

so, we end up again with the correct +, + and - signs.