Answer:
The answer is C.
Step-by-step explanation:
Let's look at work rates per minute.
Together they can paint the wall in x minutes.
Working together, in 1 minute, they do 1/x of the job.
The student who paints the wall in 16 minutes does 1/16 of the job in 1 minute.
The student who paints the wall in 24 minutes does 1/24 of the job in 1 minute.
Together, they do 1/16 + 1/24 of the job in 1 minute, but from above, we see that together, they do 1/x of the job in 1 minute, so 1/16 + 1/24 must equal 1/x. That gives us our equation.
1/16 + 1/24 = 1/x
1/16 * 3/3 + 1/24 * 2/2 = 1/x
3/48 + 2/48 = 1/x
5/48 = 1/x
x = 48/5 = 9.6
Answer: It takes them 9.6 minutes, or about 10 minutes to do the job together.
It's going to be the first one...
How you solve this is just insert the number of hours you want for X then solve the equation.
15 * 1 = 15
15 + 30 = 45
15 * 3 =45
45 + 30 = 75
3 1/2 - 1 + 6 1/2= 9 feet is how far he walked
Answer:
2 3/5
Step-by-step explanation:
convert mixed number into improper fraction
(whole number × denominator + numerator over denominator)
4 × 3 + 1
12 + 1
13/3
13/3 × 3/5
multiply numerators
39
multiply denominators
15
39/15
3 can be divided into both number 39 and number 15 so:
13/5
this is simplest form as an improper fraction
if the teacher wants simplest form as a whole number, the answer is:
2 3/5
