Answer:
choice 3.) if k = 3 because then you have 2 domain values f(3) = 6 and f(3) = 4, but this is not a function.
Step-by-step explanation:
f(3) should equal f(3)
but f(3) = 6 and then f(3) = 4, is a no no
The answer is: D
You have 3c (3 times her cousins age) -4 (4 less than)
Answer:
225 m²
Step-by-step explanation:
If W is the width of the rectangle, and L is the length, then:
60 = 2W + 2L
A = WL
Use the first equation to solve for one of the variables:
30 = W + L
L = 30 − W
Substitute into the second equation:
A = W (30 − W)
A = 30W − W²
This is a parabola, so we can find the vertex using the formula x = -b/(2a).
W = -30 / (2 × -1)
W = 15
Or, we can use calculus:
dA/dW = 30 − 2W
0 = 30 − 2W
W = 15
Solving for L:
L = 30 − W
L = 15
So the maximum area is:
A = WL
A = (15)(15)
A = 225
So the points are
(x,f(x))
(-3,-1)
(0,2)
(3,5)
(6,8)
hmm, find slope
slope betweeen 2 points (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1)
slope betwen (0,2) and (3,5) Is (5-2)/(3-0)=3/3=1
y=mx+b
m=slope
b=y intercept
given slope=1
y=1x+b
find b
input a point
(3,5)
x=3 and y=5
5=1(3)+b
5=3+b
2=b
y=1x+2 is the equaiton
Solution :
It says multiply 8 by 12 and then add 9
reading the sentence it is clear that priority is given to multiplication of 8 and 12 , once it is done then we would add 9 .
Let us first write multiplying 8 and 12 which makes it 8 x 12
the result is being add to 12 so we place 8x12 in parenthesis then add 12
which , makes it : ( 8x12) + 9
this matches to now of the given options so it is because multiplication is always given a priority comparing to addition so here parenthesis is not that important .
we can write it without parenthesis like : 8x12 +9
Answer is third option .
