Simultaneous equations: 1) 3x + 2y = 23
2x - y = 6

2) 3x - 3y = 9
2x + y = 12

3) 4x + 2y = 34
3x + y = 21

(if you could answer with workings out that would be great)​

)a smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). what is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

Interest begins accruing the date of the transaction except for auto loans mortgages credit card cash advances credit card purchases

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?