Sandra needs 2 3/4 cups of flour for one kind of cookie and 3 3/8 cups for another kind. how much would she need for both kinds?
Answer:
\(Total\ flour\ sandra\ needs\ \frac{49}{8}\ cups.\)
Step-by-step explanation:
As given
\(Sandra\ needs\ 2 \frac{3}{4}\ cups\ of\ flour\ for\ one\ kind\ of\ cookie\ and\ 3 \frac{3}{8}\ cups\ for\ another\ kind.\)
i.e
\(Sandra\ needs\ \frac{11}{4}\ cups\ of\ flour\ for\ one\ kind\ of\ cookie\ and\ \frac{27}{8}\ cups\ for\ another\ kind.\)
\(Total\ flour\ sandra\ needs = \frac{11}{4} + \frac{27}{8}\)
L.C.M of (4,8) = 8
\(Total\ flour\ sandra\ needs = \frac{11\times 2 + 27}{8}\)
\(Total\ flour\ sandra\ needs = \frac{22+ 27}{8}\)
\(Total\ flour\ sandra\ needs = \frac{49}{8}\ cups\)
\(Total\ flour\ sandra\ needs\ \frac{49}{8}\ cups.\)