Answer:
perpendicular lines
Step-by-step explanation:
when the two equation are written in slope intercept form:
y = -4x -7
y = 1/4x -2
the slopes are opposite reciprocals which means they are perpendicular
similarity, imagine 2 triangles, one smaller than the other.
triangle 1 : base=3 height=5
triangle 2 : base=15 height= unknown
15/3 =5
5×5=25
the top of the ladder is 25 feet up the wall
8 + n ÷ 3 = -2
-8 -8
n ÷ 3 = -10
*3 *3
n = -30
Multiply the numerator and denominator by 4+5i
=[(2+3i)(4+5i)]/[(4-5i)(4+5i)]
=[(8-15)+(12+10)i] / [16+25] <span>= [ -7 + 22i ] / [41]
= (-7/41) + (22/41)i </span>
Divide the second price by the second pounds. 9.95 / 5 = 1.99
So for every pound you get you pay 1.99 dollars. The second deal is better.