Answer:
9
+
i
Step-by-step explanation:
You just simplify by combining the real and imaginary parts of each expression.
Hope this helps you!!
<h2>Answer: 300 people can ride in 2 hours. The rate is 150 people per hour.
</h2><h2>
</h2><h2></h2><h2>Step-by-step explanation: You could first find out how many people can ride in an hr by multiplication. We know 50 people can ride in 20 minutes.
</h2><h2>
</h2><h2>
</h2><h2>
</h2><h2>So, 50 x 3 = 150 people can ride in 1 hr (because there are 3, 20-minute increments in 1 hr)
</h2><h2>
</h2><h2>150 x 2 = 300
</h2><h2>
</h2><h2>
</h2><h2>
</h2><h2>300 people can ride in 2 hours. The rate is 150 people per hour.
</h2><h2>
</h2><h2></h2><h2></h2>
Answer:
cos
(
5
π
12
)
=
√
2
−
√
3
2
Explanation:
By the half angle formula:
XXXX
cos
(
θ
2
)
=
±
√
1
+
cos
(
θ
)
2
If
θ
2
=
5
π
12
XXXX
then
θ
=
5
π
6
Note that
5
π
6
is a standard angle in quadrant 2 with a reference angle of
π
6
so
cos
(
5
π
6
)
=
−
cos
(
π
6
)
=
−
√
3
2
Therefore
XXXX
cos
(
5
π
12
)
=
±
⎷
1
−
√
3
2
2
XXXXXXXXXXX
=
±
⎷
2
−
√
3
2
2
XXXXXXXXXXX
=
±
√
2
−
√
3
4
XXXXXXXXXXX
=
±
√
2
−
√
3
2
Since
5
π
12
<
π
2
XXXX
5
π
12
is in quadrant 1
XXXX
→
cos
(
5
π
12
)
is positive
XXXX
XXXX
XXXX
(the negative solution is extraneous)
answer in pic more explain
Answer: The answer would be B.
Step-by-step explanation:
4(x+1) - 7(x+3)
Open all parenthesis and distribute
4x + 4 - 7x - 21
Simplify
-3x - 17
Your answer is C.
Have an awesome day! :)
