a. slope = y1-y2 / x1-x2 ==== (8-17)/(4-8) = 9/4
using y = mx+b m = 9/4 and one of the points
8 = 9/4(4) + b b = -1
y = 9/4 x -1
x+y=6 y = 6-x
x * y = 3
x * (6-x) = 3
-x^2+6x-3=0 x = 3 +-sqrt6 y = 3 -+sqrt6
1/(3+sqrt6) + 1/(3-sqrt6) = 2
Using distibutive property of multiplication:
=
1/2 (2x) - 1/2(10)
x-5
27 cm^3 x 6.74 g /cm^3 = 182 g
8.3*3.8 = 31.54 Yes,,,,, BUT are you learning about significant digits and rounding?
see above
Deleted.....see Chris answer......
(-1/-2) = 1/2
-5 * 1/2 = -5/2
Yeppers.....I often forget to Log In.....
....I used an online summation calculator to find that....