Factors of 9:
1, 9, 3
factors of 21:
1, 21, 3, 7
3 is greatest Common factor.
Divide both numbers by three and put three outside the bracket
3(3+7)
Answer:
x = 20
Step-by-step explanation:
Write and solve an equation of ratios, as follows:
1 3/4 14
------------ = --------
2 1/2 x
where x is the unknown number.
Converting the mixed numbers to improper fractions, we get:
7/4 14
------ = -----
5/2 x
Here there are two numerators and two denominators. Multiplying all four quantities by 4 will remove some of the fractions:
7 56
------ = -------
10 4x
Cross multiplying, we get:
28 x = 560, or x = 20
If the old perimeter was dilated with a scale factor of 3, then it should be multiplied by 3 to find the new perimeter.
30 times 3 = 90 inches, which is the answer
Are you kidding me? I see nothing.