Someone pls help:)
Find the equivalent expressions for (x+7) (x+1)

(x-4)^2 -9

x^2+8x+7

x(x+8)+7

Step-by-step explanation:

(x+7) (x+1)

distributive property

x^2+ x+7x+7

combine like terms

x^2 +8x+ 7

Then solve each expression to find the one equivalent to x^2 + 8x+ 7

x=-7 and x+-1

i can

step-by-step explanation:

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47