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larisa86 [58]
3 years ago
14

Add, answer as a fraction: 1/15 + 3/12

Mathematics
2 answers:
Nataly [62]3 years ago
7 0
First change 3/12 to 45/180 and 1/15 to 12/180 and 12+45=57 so the answer is 57/180
charle [14.2K]3 years ago
3 0
First you need to find the LCD, which is 60 in this case. After you find the LCD the rest is easy. Just add the two numbers together:

 
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2/9 of the students in a school are in sixth grade.
IRISSAK [1]

There are 20 students in sixth grade

Step-by-step explanation:

  • Step 1: Find the number of sixth-graders in the school.

Total number of students = 90

Number of sixth-graders = 2/9 of total students

⇒ Number of 6th graders = 2/9 × 90 = 20 students

5 0
3 years ago
Read 2 more answers
There are three marbles in a bag. One is red and two are black. What is the probability of picking a black marble first, putting
Maru [420]

Answer:

well for me I think

Step-by-step explanation:

2/3×2/3

4/9

since they are replacing the black marbles back

6 0
3 years ago
The freezing point of a certain liquid isn't -7 degrees. Another liquid freezes at -12 degrees. What is the difference between t
Degger [83]
The answer is 12-7 which is 5
7 0
3 years ago
An online retailer sells two packages of protein bars.
krok68 [10]
In order to find the price per bar, we divide the price by the amount of bars.  For the first one:

15.37/10 = $1.54 per bar

The second package:

15.35/12 = $1.28 per bar.

The 10-pack costs $1.54 per bar and the 12-pack costs $1.28 per bar.  The 12-pack has the better price per bar.

Now, let's look at the price per ounce.  We do this in a similar way.  We find the total amount of ounces in the package, and divide the price by the number of ounces.

In the first package, we multiply 10*2.1=21.  We have 21 ounces in the first package.  Now we divide 15.37/21.  In the first package, we have 0.73 dollars per ounce.

Now, let's look at the second package.  We start by multiplying 1.4*12=16.8.  There are 16.8 ounces in the package.  Now, we divide 15.35/16.8=0.91.  So, in the second package, we have 0.91 dollars per ounce.

The cost per ounce of the 10-pack is $0.73 and the cost per ounce of the 12-pack is $0.91.  The first package has the better price per ounce.

The better explanation is the second one, because I prefer the lower price per ounce, I think that the 1st pack is the better buy.
5 0
3 years ago
What is the probability of rolling a pair of dice and not rolling the same number?
Aleksandr [31]

Answer:

5/6

Step-by-step explanation:

The "first" dice can land on any number, so there are 6 choices. The "second" can not be the same number as the first one. So there are 5 choices. We multiply to get 6*5=30 ways to roll a different number. There are 6*6 total ways so the probability is 30/36 which simplifies to 5/6.

4 0
3 years ago
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