Now you can see if I have to go back and get the phone off the screen when you
Answer:
k < 50$
Step-by-step explanation:
She wants the keyboard for less than 50$, so the price, k, is less than 50 in this inequality.
Heron’s formula is useful when we know all three sides of triangle
Nearest ten would be the 4. And because the number to the left is bigger then 5 your round it. Therefore your answer is 50.
Step-by-step explanation:
We must take our equation and put it in vertex form,
f
(
x
)
=
a
(
x
−
h
)
2
+
k
where
h
,
k
is our vertex.
This equation will not factor into two squares
(
x
−
h
)
2
so we must use the completing the square method.
First we'll get rid of the
3
by subtracting it giving
x
2
−
4
x
=
−
3
Next we take half of the -4 the square it and add it to our equation to give us
x
2
−
4
x
+
4
. Since we added
4
to the left, we must also add it to the right giving
x
2
−
4
x
+
4
=
+
4
−
3
.
Now we can factor the left into two perfect squares,
(
x
−
2
)
2
=
1
.
Finally, we subtract
1
from both sides giving
(
x
−
2
)
2
−
1
. Our vertex is
h
,
k
giving
2
,
−
1
