30 I think but I'm probably wrong
2.) 10 (10*1,5*2)
3.) 42 (7*6)
4.) 12 (3*4,12*1)
Least common denominator = 32
We are given the following in the question:
Lina wants to find the least common denominator of two fractions so she can add them.
To find the LCM of the fractions:
The fractions can be added in the following manner:
8. when the numerator is greater than the denominator it is called an improper fraction.
9. a reciprocal is when you flip a fraction around for example 4/5 reciprocal is 5/4.
10. a proportion is when a part, share, or number considered in comparative relation to a whole. for example: 2 : x = 3 : 9.
11. a variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x , y , and z are common generic symbols used for variables.