What is the least common denominator for the fractions below? (Round the answer to the nearest integer)
1/2, 2/3, 4/5
30
25
7
19
Correct Answer : A
We determine least common denominator (LCD) using prime factorization of denominators as follows
2=1*2
3=1*3
5=1*5
Thus, LCD of 2, 3, 5 = 2*3*5=30
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Related Questions
Correct Answer is C
Explanation
We know that the two people work on the same work but the time to complete the work differs. Thus, the rate of doing the work for each person is as follows:
Rate of work for person A = 1 /2 work per hr
Rate of work for person B=1/3 work per hour
If person A and B work together, the time of doing the same work will be less than the fastest person A. Thus, we combine the two rates of A and B
We have 1 work and time to complete by both A and B becomes
Correct Answer is A
Explanation
Yoghurt: toppings=4:3
Yoghurt: 4.5 oz =4:3
We convert the given ratio into a proportion equation as below
Multiply both sides by 4.5 oz
Correct Answer is A
Explanation
We determine least common denominator (LCD) using prime factorization of denominators as follows
2=1*2
3=1*3
5=1*5
Thus, LCD of 2, 3, 5 = 2*3*5=30
Correct Answer is C
Explanation
Use the relation 1 teaspoon=4.93 mL to change 2.5 teaspoons to mL. Using the dimension analysis, the amount in mL is found as:
Correct Answer is A
Explanation
Step 1: Find a common denominator
The least common denominator (LCD) of 6 and 3 is 6.
Convert 4/3​ to have denominator 6:
4/3=8/6
Step 2: Add the fractions
5/6+8/6=13/6​
Step 3: Convert to a mixed number
13/6 = 2 1/6
The best estimate is about 2 ½ cups.
Correct Answer is A
Explanation
Let two numbers be x and y. Then
Three time a number=3x
Eight times a different number = 8y
Sum of the two is 3x+8y
Correct Answer is B
Explanation
100% represents total students four allied health program. Thus, 100%=800 students, and 19% joins respiratory care program is
Thus, 152 students joined the respiratory care program.
Correct Answer is C
Explanation
From the given equation, the variable t is varied to obtain the value of f(t). This means that t is an independent variable, modified variable while f(t) is a dependent variable, a measured value.
Correct Answer is C
Explanation
In a negatively-correlated variables, a change in one variable result in opposite change in the other variable. In other words, an increase in on variable results in a decrease in the other.
Now let’s analyze the given scenarios:
As elevation decreases, temperature remains the same this is NO-CORRELATION
As elevation decreases, temperature decreases is a POSITIVE CORRELATION
As elevation increases, temperature decreases is a NEGATIVE CORRELATION
As elevation increases, temperature increases is a POSITIVE CORRELATION
Correct Answer is C
Explanation
A negative correlation means as one variable increases, the other variable decreases or as one variable decreases, the other variable increases. Based on this definition, we analyze the given statement as follows:
People who play baseball more tend to have more hits is POSITIVE CORRELATION
Shorter people tend to weigh less than taller people is a POSITIVE CORRELATION
Tennis balls that are older tend to have less bounce is a NEGATIVE CORRELATION
Cars that are older tend to have higher mileage is a POSITIVE CORRELATION
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