12.5 × 3.2 × 8.8 = 352
52000 ÷ 40 ÷ 65 × 30 = ? - ?400
(52000 ÷ 40) ÷ 65 × 30 = ? - 20
(1300 ÷ 65) × 30 = ? - 20
20 × 30 = ? - 20
600 = ? - 20
? = 620
41% of 600 - 250 = ? - 77% of 900
? 246 - 250 = ? - 693
? 246 -250 + 693 = ?
? ? = 689
As per the BODMAS rule, Addition and subtraction can be treated on same priority (from left to right) when they are in consecutive order.
65% × 700 + 14 - 9 × 3 65 × (700/100) + 14 - 27 455 + 14 - 27 = 442
I. 2x2 - 13x - 189 = 0 2x2 - 27x + 14x - 189 = 0 x(2x - 27) + 7(2x - 27) = 0 x = -7, 27/2
II. 2y2 - 3y - 189 = 0 2y2 - 21y + 18y - 189 = 0 y(2y - 21) + 9(2y - 21) = 0 y = -9, 21/2
When x, as well as y, have both positive and negative values then no relationship can be established between them because if we consider x to be positive then the negative value of y will be lesser than x. If we consider x to be negative then positive value of y will be greater than x.
I. x2 + 2x - 195 = 0 = (x+15) (x-13) => x = -15, 13
II. y2 + 30y + 225 = 0 = (y+15) (y+15) => y = -15, -15
So x ? y
I. 2x2 + 19x + 42 = 0
2x2 + 12x + 7x + 42 = 0
2x (x+6) + 7(x +6) = 0
(2x+7) (x+6) = 0 x = -7/2, -6 I
I. 4y2 + 43y + 30 = 0
4y2 +40y + 3y + 30 = 0
4y(y + 10) + 3(y + 10) (4y + 3)(y + 10) = 0
y = -3/4, -10
So answer is no relation.
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