Answer:
f(8) = 192
Explanation:
f(x) varies directly with x²
This means that:
f(x) = kx²
where k is the constant of proportionality.
Now, we are given that:
f(x) = 75 at x = 5
Substitute to get k as follows:
f(x) = kx²
75 = k(5)²
75 = 25k
k = 3
This means that the equation is:
f(x) = 3x²
Now, to find f(x) at x = 8, all we have to do is substitute with x = 8 in the equation as follows:
f(8) = 3*(8)²
f(8) = 3*64
f(8) = 192
Hope this helps :)
Answer:
CE = 6
Step-by-step explanation:
we use the proportion relationship:


2×CE = 3 ×4 (cross multiply)
then
2×CE = 12
then
CE = 12/2 = 6
Answer: x = 1
Step-by-step explanation:
The numbers in the middle below each row tell the difference between the two numbers above it.
So 12 - x = ?
? = 9 + 2
∴ 12 - x = 9 + 2
x = 1
The image attached should help to make it much clearer. Comment with any questions or concerns.
the x and y values makes both equations true
Explanation
a linear system is the set of 2 linear equations.
Step 1
the solution to a linear system is the coordiante where the line intersect, this coordiante satisfies both equations, then
the x and y values makes both equations true