The correct answer is the third choice, Quadrilateral.
Answer:
y = -6
x = 1
Step-by-step explanation:
-x + 2y = -13
-x - 2y = 11
Sum the equations:
-x -x = -2x
+2y - 2y = 0
-13 + 11 = -2
then
-2x = -2
x = -2/-2
x = 1
from the first eq.
-x + 2y = -13
-1 + 2y = -13
2y = -13 + 1
2y = -12
y = -12/2
y = -6
check:
from the second eq.
-x -2y = 11
-1 -(2*-6) = 11
-1 -(-12) = 11
-1 + 12 = 11
Answer:
Option d is correct.
Step-by-step explanation:
The point of inflection of a function y = f(x) at a pointy c is given by f''(c) = 0.
Now, the given function is

Differentiating with respect to x on both sides we get,

Again, differentiating with respect to x on both sides we get,

So, the condition for point of inflection at point c is
k''(c) = 0 = - sin c + 2 sin c cos c
⇒ sin c(2cos c - 1) = 0
⇒ sin c = 0 or 
⇒ c = 0 or
Therefore, option d is correct. (Answer)
Answer:
$125
Step-by-step explanation:
Multiply what 1/5 of the price is, 25 x 5 = 125
We want to find out how many times 16 goes into 40.
It goes into 40 twice, with 4 leftover.
2 4/16
Now we can simplify.
Divide the numerator & denominator by 4:
1/4
Our final answer is 2 1/4.