Plug in 8 for x and -3 for y in both equations, and see if it makes the equations true.
First equation:
<span>
7x + 4y = 44
7(8) + 4(-3) = 44
56 - 12 = 44
44 = 44
The ordered pair works in the first equation.
Second equation:
3x - y = 27
3(8) - (-3) = 27
24 + 3 = 27
27 = 27
The ordered pair works in the second equation too.
</span>Since the ordered<span /> pair satisfies both equations, the ordered pair is a solution to the system of equations.
Answer is A)
The answer is C. m+n=54
m=3n+S.
Answer:
22.2653 or 22.27
Step-by-step explanation:
hope this helps
19
Explanation: shoes are worth 10. The boy is worth 5 and the paper 4
Answer:
Step-by-step explanation:
Recall the following Pythagorean Identity:
Let's solve the x equation for cos(t) and the y equation for sin(t).
After the solve we will plug into our above identity.
x=5cos(t)
Divide both sides by 5:
(x/5)=cos(t)
y=5sin(t)
Divide both sides by 5:
(y/5)=sin(t)
Now we are ready to plug into the identity:
Multiply both sides by 5^2:
This is a circle with center (0,0) and radius 5.
All I did to get that was compare our rectangular equation we found to
where (h,k) is the center and r is the radius of a circle.