Real World Application Solve by Substitution
7. Jamaya is selling baked goods for a school
fundraiser. She sold cupcakes for $3 each and brownies
for $2 each. She sold 15 more brownies than cupcakes.
Jama ya made $290 for her fundraiser. How many cupcakes
and brownies did Jamaya sell?
Variables:
Equations:

Number of cupcakes sold:

Number of brownies sold:

Find the indicated value, where g(t) = t^2-t and f(x)= 1+x a. -2 b. 0 c. 2 d. 8

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

Which of the following is the inverse of y = 3∧x y = 1/3∧x y = ㏒3x y = (1/3) ∧x y = ㏒ 1/3∧x