Question

7. Two years ago, the cost of pen A was Tk. 70 more than that of pen B. But due to high demand,
cost of pen A has increased by 100% and that of pen B has increased by Tk. 20. If today you nea
total of Tk. 250 to buy one pen of each type, what was the price in Taka of pen B two years ago?
(A) 30
(B) 40
(C) 50
(D) 70​

Answer 1

Answer:

Brainly.in

What is your question?

rahulgarg65

kandpall avatar

kandpall

19.05.2018

Math

Secondary School

+5 pts

Answered

Roots of the equation |x2-x-6|=x+2

2

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Answers

Brainly User

Hey Mate ✌

Here's your answer friend,

Given Q. E. ==>

x² - x - 6 = x + 2

==> x² -2x - 8

==> x² -4x +2x - 8 =0

==> x(x - 4) + 2(x - 4) = 0

==> (x + 2)(x - 4) = 0

==> x = -2 or x = 4

are the roots of given Quadratic equation.

⭐ Hope it helps you ^_^ ⭐

Answer 2

Answer:

30

Step-by-step explanation:

B = x

A = x+70

after tow years : 100% of A = 2 (x+70)

B  = x+20

2(x+70)+x+20 = 250

x = 30