If Y Is Directly Proportional To X And X = 2, Y = 5, Then Find Y When X = 7?

If y is directly proportional to x and x = 2, y = 5, then find y when x = 7?

15
35/2
25/2
None of these

Explanation

If y is directly proportional to x, then:

y = kx, where k is the constant of proportionality

Given x = 2, y = 5:

5 = k _ 2

k = 5/2

Now find y when x = 7:

y = (5/2) _ 7

y = 35/2

Last verified on 28-07-2026

Related MCQs

If the point is (a,−a), then it lies on which line?

y=x
y=−x
y=a
x=a

اس سوال کو وضاحت کے ساتھ پڑھیں

Find the sum: 2×1^2 +4×2^2 +6×3^ +⋯+20×10^2

76,440
77,000
77,440
6050

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

Given:

2 \times 1^^{2} + 4 \times 2^^{2} + 6 \times 3^^{2} + \dots + 20 \times 1 0^2

Write the terms as:

2 (1^^{3}) + 2 (2^^{3}) + 2 (3^^{3}) + \dots + 2 (1 0^^{3})

= 2 (1^^{3} + 2^^{3} + 3^^{3} + \dots + 1 0^^{3})

Using the formula:

1^3+2^3+cdots+n^3=left[frac{n(n+1)}{2}right]^2

For $n = 10$ :

= 2 [10 ( 11 )/2]^^{2}

= 2 (55)^^{2}

= 2 \times 3025

6050

$Last updated 27-07-2026 by NA$

If x+y=16 and x−y=3, then x^2 −^ 2 =?

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

Given:

$x + y = 16$
$x-y=3$