Solve the system of equations. 4x + 4y + 3z = 6
4x + 7y + 5z = 5
5x + 3y + 32 = 7
a. (x = 2, y = 1,2 = -2)
b. (x = 4, y=-1,2 = 0)
C. (x = 3, y = 0,2=-3)
d. (x = 1, y = 2,2 =-1)
Please select the best answer from the choices provided

Mary had at least an 80% on her test write an inequality to represent this situation

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.

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?