Find the volume of the solid. PLEASE HURRY ASAP​

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Using elimination, what is -4x+2y=-12 4x+8y=-24

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)