If x2 – y2 = 58 and x-y=4 what is the average of x and y?
Correct answer B. 27
Subject / 703 questions
ECAT Math MCQs
Page 30 of ECAT Math multiple-choice questions with answers. Tap an option to check yourself.
Page 30 of 36
What is the value of a2-b2/a-b when a = 12.3 and b = 13.2?
Correct answer B. 25.5
Which of the following is equal to (z+1/z)2-(z-1/z)2?
Correct answer B. 4
Advertisement
If a2+b2 = 8 and (a-b)2 = 4 what is the value of ab?
Correct answer C. 2
If a2-b2 = 21 and a2+b2=29 which of the following could be the value of ab? I- -10 II- 5?2 III- 10
Correct answer D. I and III only
If 1/x+1/y=1/z and xy = z what is the average of x and y?
Correct answer B. 1?2
(4x+5)(x-6)-(5x+7)(x+8) =?
Correct answer C. ?x2-34x-86
If (1/x-x)2 = 50 what is the value of 1/x2+x2
Correct answer C. 52
(1000002)2 – (999998)2
Correct answer C. 4000000
Advertisement
Subtract 5×2-9x-10 from 8×2+10x-25
Correct answer B. 3x2 - 19x - 15
What is the sum of 3×3 + 7×2 – 7 and 5×2+8x-9?
Correct answer A. 3x3 + 12x2 + 8x - 16
If (5w)(5x) = 5y/5z what is z in terms of w x and y?
Correct answer B. y-w-x
(a3+b)2 – (a3-b)2 +
Correct answer D. 4a3b
If a = p + prt they r =?
Correct answer B. (a-p) / pt
The trinomial x2+x-20 is exactly divisible by?
Correct answer D. x-4
Advertisement
Divide (x-y)/(x+y) by (y+x)/(y-x) =
Correct answer D. ?(x-y)2/(x+y)2
If p=10/(q+2) what is value of pq is terms of p?
Correct answer A. 2(5-P)
If 5a=2b=40c what is the value of 8a+5b in terms of c?
Correct answer B. 164c
If p+q = 4 q+r = -2 r+p=3 then p+q+r =?
Correct answer B. 5?2
If x = (p+q)/(p-q) then x-1 =?
Correct answer D. 2q/(p-q)