Answer:
while multiplying or dividing both side by a negative number we have to change the side of inequality sign. so u have to write r greater then -24
Answer: 21/2 can not be simplified anymore!!
Step-by-step explanation:
Answer:
There were 20 questions on the quiz
Step-by-step explanation:
In this question, we are concerned with knowing the number of questions on a quiz, given that Deana had a certain percentage after scoring an amount of marks.
We proceed as follows;
Let the number of questions on the quiz be X.
Now, she got 85% by making 3 incorrect choices. This means the percentage of questions she got incorrectly would be 100-85 = 15%
what we are saying is that it is just 15% of her questions that were wrong.
This mathematically;
15% of x = 3
15/100 * x = 3
15x = 3 * 100
15x = 300
x = 300/15
x = 20
It should take 1.75 minutes to run it 1.5 times
that is 1 and 3/4 minutes
