Standard form is Ax +By =c
y = -4/5 x -7
multiply by 5
5y = -4x -35
add 4x to each side
4x +5y = -35
multiply by -1
-4x -5y = 35
Choice D
2x^2 = 50
x^2 = 25
x = + or - 5
Answer:
We got less than 2 1/2 ft
Step-by-step explanation:
We need to add up all the snow on the three days
Monday = 15 inches
Tuesday = 4 1/2 inches
Wednesday =6 3/4 inches
------------
25 + 1/2 + 3/4 inches
Getting a common denominator
25 + 2/4+3/4
25 + 5/4 inches
25 + 1 + 1/4 inches
26 1/4 inches of snow
2 1/2 ft
1 ft = 12 inches
2 ft = 24 inches
1/2 ft = 6 inches
2 1/2 ft = 24+ 6 inches
= 30 inches
26 1/4 inches < 30 inches
We got less than 2 1/2 ft