Please help. I know it’s not the hardest, but I think I did something wrong when I solved it. Please include your work. Tysm! Please solve only number 27!

4.2 (to 1d.p.)

Step-by-step explanation:

=9/2              9/2 = 4.5

Multiply both sides by (n-3.2)

n+0.3 = 4.5(n-3.2)

Now expand the brackets

n+0.3 = 4.5n - 14.625n

Now rearrange to make n the subject

n + 0.3 = 4.5n -14.625

-n             -n

4.5n - n -14.625 = 0.3

3.5n -14.625 = 0.3

 +14.625          +14.625

3.5n = 14.925

÷3.5    ÷3.5

n = 4.2

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45