Of the four choices given, which two, when written as a system, have a solution of (-4,5)? у 2 -1 -2 4 2x+y=-3 2. 3 5 -2x+y=-3 -1 2 3 7 y 0 -3 4 -8

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Long division the problem is 40 ➗ 348 = ?

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults.how many students and adults went if the ticket charge was $42.75