Exam Questions | Prep Guide | A+
• how to find domain with a given equation. CORRECT ANSWER: -if a
fraction, set denom. to zero, then solve
-in equation, plug in 0 for x
*usually can be a + or - solution*
• (-) + (-)= ...
(-) x (-)= ...
(-) divided by a (-)= .... CORRECT ANSWER: (-)
(+)
(+)
• quotient. CORRECT ANSWER: division
• adding and subtracting fractions. CORRECT ANSWER: -make
denoms the same
-add/subtract numerators
• multiplying fractions. CORRECT ANSWER: just multiply numerators
across and denoms across and simplify
• dividing fraction. CORRECT ANSWER: multiply by reciprocal
(change second fraction to reciprocal)
, • multiplying/dividing/adding mixed fractions. CORRECT ANSWER:
turn them into regular fractions (multiplying # by denom, adding it to
num, keeping denom the same) and continue
• subtracting mixed fractions. CORRECT ANSWER: *first: make
denoms the same*
set up as if you're subtracting two large numbers (on top and on bottom)
• how to solve problems like 5-2 (1/3). CORRECT ANSWER: 1) make
problem 5- (2 (1/3))
2) separate : 5- 2- (1/3) to get: 3- (1/3)
3) rewrite whole #: 2+1- (1/3)
4) rewrite as: 2 + (3/3) - (1/3) to ed up with:
2 (2/3)
• inequality problem rule (<, >, etc like problems). CORRECT
ANSWER: When *multiplying/dividing* each side by a *positive*
number, the inequality sign *stays the same*
When *multiplying/dividing* each side by a *negative* number, we
*flip* the inequality sign.
• area and circumference of circle. CORRECT ANSWER: A= pi x r^2
C= 2 x pi x r