Question

10 1) 5x + 4y = 14 and 4x + 5y = 13, then find the value of x - y
2) Find to for an A. P. for which a = 1 and d = 1
3) Write quadratic equation whose roots are -2 and 5.
4) A card is drawn from a pack bearing numbers 1 to 25. Write sample space 'S' and number of sample points n(S), for above random experiment.

plz help me ​

Answer 1

Step-by-step explanation:

1️⃣ANS⬆️️ : answer of first question is in that ⬆️ photo

2️⃣ANS➡️ : a = 1, d = 1

then A.P. is 1, 1, 1, 1, 1,....

3️⃣ANS➡️ : If roots are 2 and -5 that means that we have the factors too!

x=2 x=-5

x-2=0 x+5=0

Go back into zero-factor property

(x-2) (x+5) = 0

Now add the leading coefficient to it.

3(x-2) (x+5) = 0

distribute the 3 into the factor (x-2)

(3x-6) (x+5)

Multiply the factors

3x2+15x-6x-30

Combine like terms and then you will get the quadratic equation

3x2+9x-30

4️⃣ANS➡️ :A card is drawn at random from the pack of cards bearing number 1 to 25.

∴S={1,2,3,4,....,25}

This is your answer, please mark me as brainliest