Question 10 (1 point) A square has sides that are each 90 feet long. Which equations can be used to calculate d, the length of a diagonal of the square, in feet?
Select all that apply.
d=
(90 x 90)
2
Oь
d= V 902 + 902
d=V4X 902
Od
90
cos 45º =
d
90
sin
45º =
d
90
tan45º =
d

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.