Desean is sorting his rock collection. 2/3 of the rocks are metamorphic, and 3/4 of the remainder are igneous rocks. if the 3 rocks left over are sedimentary, how many rocks does desean have?

DeSean has 36 rocks

Fraction numbers are known as numerator and denominator  

On a number line, fractions are expressed in points that lie between two integers  

The general form of fractions is  

a = numerator  

b = denominator  

Mixed fractions consist of whole number and ordinary fractions  

There are a number of steps in adding fraction operations

a. Multiply top and bottom of each fraction by the denominator of the other. or  

b. we can use Least Common Denominator is  

the smallest of all the common denominators.  

DeSean is Sorting his rock collection are metamorphic,   of the remainder are igneous rock and 3 rocks left over are sedimentary

Let x = total rock

we translate this sentence into equation

,

we translate this sentence into equation

,

so total of Dean's rock:

Because the denominator is not the same, so we can use both multiplying or least common denominator.

let we use least common denominator:

List multiples of 3: 3, 6, 9, 12, 15, 18, 21...

List multiples of 12: 12,24,36 ...  

the smallest number that is the same: = 12

then addition operation becomes :

5 - 1 1/4 will be more than 4  

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spend practicing instruments  

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spend on the comic books  

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Keywords : rock collection, fractions addition,metamorphic,igneous rocks

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: