The function h defined by h(t) = (49 +4.7t)(12 – t) models the height, in meters, of an object t seconds after it is dropped from a helicopter.
a) Find or approximate the time in seconds when the object hits the ground. Explain or show your reasoning.

Evaluate the given expression if m=45 |-3m|

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

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