Answer:
B) I can be little confident it might be close,or might be way off
Answer:
D. (7,0)
Step-by-step explanation:
Our original equation is 3a-4b=21.
The one we will try first is D. (7, 0)
Since we need to plug it in the form of (a,b) here is the equation now:
3(7)-4(0)=21
Now we solve:
3*7=21
4*0=0
Now we have 21-0=21
21-0 does equal 21.
Answer:
x = 9, Angles are 54°
Step-by-step explanation:
First, we need to find x:
7x-9 = 5x+9
+9 +9
7x = 5x+18
-5x -5x
2x = 18
x = 9
Now, we plug our x value in to find our angles.
5(9) + 9 = 54
Angle B = 54°
7(9) - 9 = 54°
Angle E = 54°
(angles are the same due to AAA property)
Answer:
Triangle 3: 3, 4 ,5
Step-by-step explanation:
Well, you can easily tell by 3, 4, 5 being a Pythagorean triple.
But you have to use the Pythagorean Theorem to solve this.
So you get the side lengths of the two shortest sides, and you add the squared versions of them together.
So: 3^2+4^2 and if that equals the biggest side:5^2 then it's a right triangle.
The correct answer is A. It satisfies the top equation but not the bottom equation.
This can be found by plugging in the given x and y values to the system, as seen in the attached picture.
I hope this helps! :)