5x-9y=-65
10x-3y=20
Multiple the first equation by 2
10x-18y=-130
10x -3y=20
Then subtract the two equations to get rid of the x
21y=-150
Divide the -150 by 21
Y=-7.14
Plug the y into the original equation. (Either one)
5x-9(-7.14)=-65
5x-64.28=-65
Then add 64.28 to the -65
5x=-0.72
Divide by 5
X=-0.144
I hope this is right
Answer:
The original price was $288.00.
Step-by-step explanation:
First, identify your rate and your base. Your rate is 20% and your base is $240. Next, take 20% and convert it to a decimal, making .20. Third, multiply the base by the new rate, $240 x .20, but don't line up the decimals. This will give you $48.00 (your number will usually get smaller if you're working with decimals). Finally, add $48.00 to $240.00. This will give you $288.00.
The Pythagorean theorem states that a^2 + b^2 = c^2, where a and b are sides not opposite to the right angle, shown as a square. C represents the hypotenuse, or side opposite of the right angle
We see that a = 14 (it can also be b; both can be plugged in as both are adjacent and not opposite of the right angle)
c = 19; hypotenuse is opposite of right angle
14^2 + b^2 = 19^2
196 + b^2 = 361
b^2 = 361 - 196
b^2 = 165
b = square root of 165
b = 12.845
x = 12.845
Answer:
28.
Step-by-step explanation:
A = bh = 8 · 3.5 = 28
B. 35 degrees. Hope this helped! :)
