Please help im in a timed quiz!!
The QUADRATIC curve-of-best-fit for the data in the table is given by the equation

A) y = 0.8x2 + 1.7x - 1.4.
B) y = 1.1x2 + 2.2x - 1.2.
C) y = 1.4x2 - 2.9x + 1.0.
D) y = 2.3x2 - 2.4x + 3.5

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.