Question

PLS SOLVE AND I WILL MARK YOU THE BRAINLIEST

Answer 1

these are the answers.

hope it helps

Answer 2

Answer:

1. a) 16/3 b) 2

2. -26/9

3. a+b+c

4.-24x + 21y - 15a

5. 18

6.30%

7. a) 264%

b) 18.2%

8. 780 boys

9. 2625

Step-by-step explanation:

1. a)  $\frac{-8}{13}$  ÷ $\frac{3}{-26}$

$\frac{-8}{13}$  × $\frac{-26}{3}$

-8 × (-2)/ 3

16/3

b) 1 ÷$\frac{1}{2}$

   1 × 2

   2

2. 11/56 + (-5/8)

   11/56 - 5/8

    11 - 35/ 8

   - 24/8

   - 3

- 3 - (-1/9)

-3 + 1/9

-27+1/9

-26/9

3. (a+b-c) + (b+c-a)+ (c+a-b)

a-a+a + b+ b-b - c+c+c

a+b+c

4. -13x+5y-8a - ( 11x-16y+7a)

-13x+5y-8a - 11x + 16y-7a

-13x- 11x + 16y +5y-8a -7a

-24x + 21y - 15a

5. X³ + Y³ +Z³ - 3xyz

here x= 1  y= 2   z=3

1³+2³+3³-3×1×2×3

1+8+27-18

36-18

18

6. 3/10 × 100 = 30%

7. a) 2.64×100= 264%

   b) 0.182×100

       18.2%

8. let total students be 100 units

   A/c Boys is 60%

then , boys = 60 units

   and girls =  40 units

No. of girls = 520

40 units =520

1 units = 13

No. of boys = 60 units = 60×13

                                     = 780

9. S.P = (100 + profit%)/ 100  × C.P

    S.P = 100 + 5%/ 100 × 25,000

    S.P = 105/100 × 25,000

    S.P = 105×250

    S.P = 2625