Answer:
If the question is asking for a solution for both, then only point (0,2)
Point (0,2) is a solution to both equations
Point (5,3) is a solution to neither (meaning not any of the equations)
Point (-2, 16) is not a solution to the<u> first equation</u>, but is to the <u>second</u>
Point (-4, -9)<u> is a solution</u> to the first, but <u>not </u>to the second.
Step-by-step explanation:
Using the Property of substitution. 7x-4y=8
(0,-2)
7(0)-4(-2)=8
7(0)=0
-4(-2)=8
0+8=8
This solution is true.
(5,3)
7(5)-4(3)=8
7(5)=35
-4(3)=-12
35-12=23 (not 8)
This solution is not true.
(-2,16)
7(-2)-4(16)=8
-14-64=-78 (not 8)
This solution is not true.
(-4,-9)
7(-4)-4(-9)=8
-28+36=8
This solution is true
__________________________________________________________
Y=-9x-2
(0,-2)
-2=-9(0)-2
-9(0)=0-2=-2
-2=-2
This solution is true
(5,3)
3=-9(5)-2
-45-2=-47
3=-47
This solution is not true
(-2,16)
16=-9(-2)-2
16=18-2
16=16
This solution is true.
(-4,-9)
-9=-9(-4)-2
-9=36-2
-9=34
This solution is not true.
Answer: b) sq. root of 65
use pythagorean theorem to solve
a2+b2=c2
3^2+b^2=5^2
9+b^2=25
b^2=16
b=4
apply to other triangle for second leg
7^2+4^2=c^2
49+16=c^2
65=c^2
sq root of 65= c
Notice that both equation has a 2f term in them
solve for 2f for both eqs.
2f= 736-6n
2f= 920-10n
since they both equal to 2f, yo can set them equal to each other
736-6n = 920-10n
and solve for n if you want
X= 23/7 so twenty-three sevenths
All you do is add 3.0 and 2.5
This would give u 5.5
Correct me if i'm wrong, but i hope it helps
