Copy and insert two pairs of brackets to make the equation true. 1 + 2 x 3 + 4 x 5 +6 x 7+ 8 x 9 = 505

Answer and explanation:

1For BODMAS to apply to the equation and five us the correct result of 505, we did have to place the brackets where they should be and show the order of operations using the BODM

1 + 2 x 3 + 4 x 5 +6 x 7+ 8 x 9 = 505

1+(2

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign