Start by defining variables (things you don't know). Let's make:
t = number of true/false questions
m = number of multiple choice questions
Equation #1
total questions on the test (given to be 20) is then:
t + m = 20
Equation #2
Multiply the number of questions by the points it's worth to get the total points
3t + 11m = 100
Now, you can use substitution to combine the two equations.
t + m = 20
by subtracting m from both sides, equation 1# becomes..
t = 20 - m
substitute t for 20 - m in the second equation.
3(20 - m) + 11m = 100
Solve for m.
3(20 - m) + 11m = 100
60 - 3m + 11m = 100
8m = 100 - 60
8m = 40
m = 5
There are 5 multiple choice questions on the test.
Now use this to find t.
t + m = 20
t + 5 = 20
t = 20 - 5
t = 15
there are 15 true/false questions on the test.
Answer:
56.25
Step-by-step explanation:
so basically you divide 180 by the denominator of the fraction which is 16 and multiply by the numerator, so 180 divided by 16 times 5 cool i guess
Answer:
P(blue) = .25
Step-by-step explanation:
We need to know how many marbles in the bag
3 blue marbles+ 4 green marbles+ 5 red marbles = 12 marbles
P ( blue) = blue / total = 3/12 = 1/4 = .25
One standard deviation below the mean is 36.7
One standard deviation above to mean is 53.3
Idk which one your looking for
Answer:
18%
Step-by-step explanation:
So there is 60 mice and he caught 18.
Convert it to a fraction (ratio)
So the answer is 18% for this question.
Hope this helps.
