The gcf of 18 and 42<span> is the largest positive integer that divides the numbers </span>18 and 42<span> without a remainder. Spelled out, it is the </span>greatest common factor of 18 and 42<span>. Here you can find the </span>gcf of 18 and 42<span>, along with a total of three methods for computing it.</span>
Answer:

Step-by-step explanation:
Assuming We want to evaluate

When y=6 and z=3.
We substitute to get:

We multiply to get:

We simplify the denominator to get:

Reduce the first fraction:

Add the numerator and keep one denominator for they are like fractions

Write as a mixed number:

Complementary angles - the sum of two angles equals 90 degrees
Exterior angle theorem- the sum of the remote interior angles of a triangle equals the outside angle
Isosceles triangle- has two equal sides and two equal angles
Supplementary angle- the sum of two angles equals 180 degrees
Triangle sum theorem- the sum of of interior angles equal 180
Vertical angles- congruent angles that are opposite of each other.
Answer:7/12
Step-by-step explanation:there are 12 coins in total and 7 of them are pennies