Question

The ratio of red jelly beans to blue jelly beans is 5 to 7. If there are 49 bluejelly beans, how many red jelly beans are there? *

Answer 1

Solution

Part a

For this case we can create the following ratio:

$\frac{5red}{7blue}=\frac{x}{49blue}$

And then we can solve for x and we got:

$x=49\cdot\frac{5}{7}=35\text{red}$

Part b

For this case we can do the following:

$\frac{2\text{inches}}{100mi}=\frac{3.5inches}{x}$

Solving for x we got:

$x=\frac{3.5\cdot100}{2}=175mi$