Answer:
Simplify:
Step-by-step explanation:
Some of the rates that can be formed are; Speed = 8.333 mph
Number of miles covered per gallon of gasoline used = 14.706 mpg
The number of gallons used per hour = 0.567 gallons per hour
<h3>How to use units conversion?</h3>
We are told that the Northwest Football team drove 25 miles.
Now, the time that this team took was 3 hours.
Thus, one rate that can be formed is the speed in mi/hr. Thus;
Speed = 25/3 = 8.333 mph
Another rate that can be found is the number of miles covered per gallon of gasoline used. This gives us;
25/1.7 = 14.706 mpg
Another rate that can be gotten is the number of gallons used per hour;
= 1.7/3 = 0.567 gallons per hour
Read more about Units Conversion at; brainly.com/question/141163
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Answer:
The jar of chermical contains 66g of Zinc.
Step-by-step explanation:
The ratio of Zinc to Copper is 3 : 13
A jar of the chemical contains 286g of copper.
Let the mass of the Zinc be xg.
= 
x = 
= 66g
So the jar of chemical contains 66g of Zinc.
Let's start by seeing what percentage is incorrect.
100-85=15
So, 15% is incorrect when answering 3 problems wrong. So let's divide 15 by 3.
15÷3=5
So, each problem is worth 5%, let's divide 100 by 5. The reason I'm doing thiis is to find how many questions are on the quiz, since if you got them all right, it's 100.
100÷5
20
There are 20 questions, let's make sure this is correct.
If she got 3 wrong, she got 17 right. Let's calculate her percentage and make sure it is the right one.
17÷20
.85×100
85%
So, there are 20 questions on the math quiz.
Answer:
one card takes 1/12 of an hour or 60/12=5 minutes.
she has 3/4 of an hour or 60×3/4=45 minutes
number of cards she can make =45/5=9
