Hi there!
So, our two equations are:
2x + 3y = 20 and
-2x + y = 4
We can see that the x's will cancel out because they're the same number, opposite signs. Then we're left with 4y = 24.
Divide 24 by 4, which is 6.
y = 6, then we plug that in to the first equation for y:
2x + 3(6) = 20
2x + 18 = 20
2x = 2
x = 1
So, she made her first mistake when adding the equations, adding 20 and 4, she somehow got 16.
The solution to the system is (1,6).
I hope I helped!
Answer:
f(4)=2(x)^2-5(4)+4
Step-by-step explanation:
f(x) is basically just y, but it is also telling you what the value of x is. So if f(4) then that means that x is 4, so you can just replace x with 4 and simplify. Hope this helps :)
Answer:
y=4x-3
then add 3 to each side to get: y+3=4x.
Next, just divide both sides by 4 to get x = (y+3)\div4.
Answer:
its c hope this helps:)
Step-by-step explanation:
Answer:
the profit reduced rate is -0.4737
Step-by-step explanation:
The calculation of the profit reduced rate is given below:
= (100,000 - 190,000)÷ (190,000)
= -90,000 ÷ 190,000
= -0.4737
hence, the profit reduced rate is -0.4737
We simply determine the difference and then divided it by 190,000
