Step-by-step explanation:
-7x + 2y = 18
6x + 6y = 0
21x - 6y = - 54
6x + 6y = 0
27x = -54
x = -2
6(-2) + 6y = 0
-12 + 6y = 0
6y = 12
y = 2
(-2,2)
Answer:
Step-by-step explanation:
If AD is an altitude, then by definition it drops from the vertex angle (the top angle) and meets the base at a right angle, which measures 90 degrees. That means that 17x + 73 is a right angle:
17x + 73 = 90 and
17x = 17 so
x = 1
Y=ax+b
Temos:
b=1
e o ponto (3,3)
Substituindo:
3a+1=3 ⇒ 3a=3-1 ⇒ 3a=2 ⇒ a=2/3
Portanto:
y=2/3x+1
Find the difference between prices: 4.86-4.50=.36
Divide the difference (.36) by the original price: .36/4.50=.08
Change to a percentage: 8%
The sales tax is 8% :)
2+2 is 4 you can do it on a calculator buddy :)