The price of a shirt is $400. A shop offers 10% discount. Work out the discount price. *

$ 360

Step-by-step explanation:

$400 - 10%·$400 =

= $400 - 10×$400/100

= $400 - $40

= $ 360

$360

Step-by-step explanation:

there are multiple ways to work this oout, but the easiest is to find 10% of 400, and subtract it from 400.

to find the 10%, you can convert 10% into a decimal, which is 0.1.

you can then use a calculator to multiply 400 by 0.1, giving you 40.

400 - 40 = 360.

or, you can divide 400 by 100 and multiply it by 10, giving you 40.

your answer is $360.

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180