Answer:
A
Step-by-step explanation:
3 cups of flour produces 2 batches of dinner rolls. So, if one batch makes 15 rolls, then 2 batches makes 30 rolls. Therefore, 3 cups of flour produces 30 rolls.
Laura wants to find how much flour she needs to make 12 rolls.
Here's the setup:
Let x be the number of cups of flour needed. Then,
(3 cups of flour)/(30 rolls)=(x cups of flour)/(12 rolls)
This is the set up for all equations involving ratios. The units should be consistent. Notice how I have flour/rolls=flour/rolls.
It is not necessary to solve the equation, but you should to make sure your answer makes sense. By cross-multiplying, we get x=(3*12)/30 or 1.2 cups.
This solution makes sense. Because 3 cups of flour produces 30 rolls, one cup produces 10 rolls. We need slightly more than 1 cup to get 12 rolls.
A, B, C, D, E, F, G, H, I, J
The sample space for an experiment is the set of all possible outcomes for the experiment. This is experiment is a single step experiment, meaning that only one ball will be drawn from the bag. Since this is the case, all possible outcomes involve pulling any letter labeled A - J. No letter appears more than once in the bag, so there is only a 1 in 10 chance of drawing each letter.
<span>D = rt
t how much time will elapse before they are 20 miles apart
(12mph)t + (6mph)t = 180mi
18t = 18
t = 10hrs, the time that will elapse before they are 20 miles apart
</span>
54 per hour. And 4 hours and 20 minutes