Twice a number minus a second number is -1. twice the second number added to three times the first number is 9

The numbers are: 1 and 3.

Step-by-step explanation:

Let the first number be and the second number be .

Given: The difference between twice the number and the second number is . writing this mathematically,

From the second statement we get:

Solving for and we get:

and

Thus the first number is 1 and the second number is 3.

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.