PLEASE HELP! I WILL MARK YOU AS BRAINLIEST!

10 cm²

Step-by-step explanation:

The area of a square = s², where s is the measure of the side

To calculate the side use Pythagoras' identity

Consider the lower side with right triangle legs 3 and 1, then

side² = 3² + 1² = 9 + 1 = 10 ( take the square root of both sides )

side = , thus

area = ( )² = 10 cm²

10

Step-by-step explanation:

s = sqrt(1² + 3²)

s = sqrt(10)

Area = s²

= 10 cm²

y-1700=200(x+4)

step-by-step explanation:

200(x+4) is 200x + 800 she is saving 200 per week x is the weeks and the -1700 is. us that’s howmuch she already had