How can I solve 0.7 ÷ 4 in standard algorithm?

Use the multiplier method to incrases £258 by 43%

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet