exam
Maths Puzzle
Numerical Ability
In a race , Mary is 50 ft. in front of Susie after 10 seconds. How fast can Mary run if Susie runs 20 ft per second?
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exam Other Question
If A is a 5 × 5 matrix, then AI^-1 =
a. A^-1
b. I
c. A
d. A^-1 I
Solve. 3x - 7 = 2x + 8
my answer is x = 15
Is this correct?