<span>If we add these two equations together, we can quickly follow the system via the elimination method as the y-terms cancel out.
Doing so results in 6x= -30, so x = -5. Plug this in and solve for y.
2*(-5) + 3y = -7, -10 + 3y = -7, 3y = 3, y = 1.
The solution is therefore (-5,1).</span>
Answer:
n' = (-5,2) k' = (-1,1) t' = (-5,0)
Step-by-step explanation:
The formula of a perimeter of rectangle:
P = 2(w + l)
We have l = 12 in and P = 56 in.
Substitute:
2(w + 12) = 56 <em>use distributive property</em>
(2)(w) + (2)(12) = 56
2w + 24 = 56 <em>subtract 24 from both sides</em>
2w = 32 <em>divide both sides by 2</em>
w = 16
<h3>Answer: D. 16 in.</h3>
Lets see!
We need to use the pythagorean theorem (a^2+b^2=c^2) to check.
So..
15^2+ 17^2 = 19^2
225+ 289= 361
Hm 225 and 289 do NOT equal 361 therefore it is NOT a right triangle.
18/4 = x/30
18x30 /4 = 135 minutes or 2 hours and 15 minutes.