HELP (WILL NAME BRAINLIEST)

A firework is fired vertically into the air at a speed of 100 m/s. The expression −5t^2 + 100t + 40 gives the height of the firework after t seconds. Factor this expression.

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

What is the x-intercept and y-intercept of the equation 2x+1. 2o

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered