Question

plz answer all the questions plz fast​

Answer 1

Step-by-step explanation:

1 → 3y + 8 = 26

3y = = 26 - 8

3y = 18

y = 6 ans

2 → class interval = upper limit - Lower limit

= 60 - 40

= 20 ans

3 → 3x+5y=9 …(1)

5x+3y=7 …(2)

Let us simplify the equations by eliminating a variable

Make the coefficients of X or Y equal

Multiply equation (1) with 5 and equation (2) with 3

We get 15x+25y=45 and 15x+9y=21

Now subtract the equations, we get

(15x+25y)-(15x+9y)=(45–21)

16y=24, y= 24/16 = 3/2

Substituting the value of y in equation (1) we get

3x+5(3/2)=9

3x+15/2=9

3x=9–15/2

3x=3/2

x =1/2

x+y =3/2+1/2= 2

x+y=2

The other method is simply add equations (1) & (2)

You get

8x+8y=16

x+y=2 Ans

4 → 9 is the middle most value.

∴ Median =9

follow,,,meee//