More Help for Finals, part 3

Sixth Grade: True or False
__ When multiplying fractions, you simply multiply numerator to numerator, and denominator to denominator. (TRUE)
__ There are three yards in a foot. (FALSE. There are three FEET in a YARD.)

Seventh Grade:
Find the Greatest Common Factor of each set of numbers.
11. 18, 27 A) 2 B) 3 C) 6 D) 9
** The prime factorization of 18 is 3 x 3 x 2
The prime factorization of 27 is 3 x 3 x 3
The factors are 3 and 3. Therefore the GCF is 3 x 3 or 9. "D" is the correct answer.
12. 30, 72 A) 2 B) 3 C) 6 D) 9
** The prime factorization of 30 is 3 x 5 x 2
The prime factorization of 72 is 3 x 3 x 2 x 2 x 2
The factors are 3 and 2. Therefore the GCF is 3 x 2 or 6. "C" is the correct answer.

Pre-Algebra:
Is the following relation a function?
{(2,3),(1,4),(3,2),(2,5)}
To be a function, each member of the domain (x coordinate) must be paired with only one member in the range (y coordinate). The number 2 is paired with both 3 and 5, so it is NOT A FUNCTION.

What is the slope of a line passing through the following points? Q(2,10), B(4,6)
The slope formula is y2 - y1/ x2 - x1. Simply plug in the values for x and y, and calculate the slope. So 10 - 6/2 - 4 = 4/-2 or simply -2. M= -2.

Algebra:
15p > 60 You must solve for p, so divide both sides by 15. New inequality is p> 4

d/-13 > -5 Since d is divided by -13, we must multiply by the same number. When you multiply or divide by a negative number, you must flip the inequality sign the other way. So your answer is d < 65.