Eric's car has a gas tank that holds 21 liters. if eric used up 2 decaliters of gas, how many liters of gas does he have left in the tank?

Capacity of the gas tank = 21 liters.

Amount of gas used by Eric = 2 decaliters

                                              = 2 × 10

                                              = 20 liters

To find the amount of gas left in the tank, we have to subtract 20 from 21.

So, amount of gas left in the tank = 21 - 20

= 1 liter.

if x decreases by 4 then y increases by 10

step-by-step explanation:

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.