Which of these is an example of a literal equation?
a.3x – 4y
b.12 = 9 + 3x
c.6 + 30 = 62
d. ax – by = k

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The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers