Please hep me to solve these simple question

Step-by-step explanation:

a

(9-2)² + 16/8

= 7² + 2

= 49 + 2

= 51

b

(81/9) * (3/2)⁵

= 9 * (3⁵/2⁵)

= 9 * 243/32

= 2187/32

= 2176/32 + 11/32

= 68 + 11/32

= 68 11/32

c

(8 + 5*5) - (36/6)²

= (8 + 25) - 6²

= 33 - 36

= -3

d

4*(95/5) - 8 * (9-2)²

= 4*19 - 8*7²

= 76 - 8*49

= 76 - 392

= -316

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

measurement of the swimming pool is given as = 7 yards 4.79 feet

first we will convert this to yards only.

1 foot = 0.33 yards

so, 4.79 feet = yards

so total yards are = yards

now we will convert this in meters.

1 yard = 0.914 meters

8.580 yards = meters

0.842 m = 0.842*100 = 84.2 cm

this becomes 7 meters and 84.2 cm

hence, the pool is 7 meters and 84.2 cm wide.