Math Flashcards
7 cards from real Core Academic Skills Assessment practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Math flashcards as text
What is 15% of 320?
Answer: 48
320 × 0.15 = 48.
Simplify: (x² − 9)/(x − 3)
Answer: x + 3
x² − 9 factors as (x+3)(x−3); dividing by (x−3) gives x + 3.
A car travels 270 miles in 4.5 hours. What is its average speed in miles per hour?
Answer: 60 mph
Speed = 270 ÷ 4.5 = 60 mph.
What is the median of the data set: 7, 12, 3, 19, 5, 14, 8?
Answer: 8
Ordered: 3, 5, 7, 8, 12, 14, 19 — the middle value is 8.
If f(x) = 2x² − 3, what is f(−2)?
Answer: 5
f(−2) = 2(4) − 3 = 8 − 3 = 5.
A triangle has angles measuring 45°, 75°, and x°. What is x?
Answer: 60°
The sum of angles in a triangle is 180°; x = 180 − 45 − 75 = 60°.
Which inequality represents 'a number decreased by 7 is at most 15'?
Answer: n − 7 ≤ 15
'At most' means ≤, and 'decreased by 7' means − 7, giving n − 7 ≤ 15.
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