Need help with square problem

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

The table below shows the approximate height of an object x seconds after the object was dropped. the function h(x)= -16x^2 +100 models the data in the table. for which value of x would this model make it the least sense to use? a. -2.75 b. 0.25 c. 1.75 d. 2.25