Answer: dydx=2sec2(x)tan(x)
Step-by-step explanation:
Answer:
5.4
Step-by-step explanation:
To find the distance between two points, 
and 
, plug them into the following equation:
Two negatives make a positive
Therefore, the distance between the two points rounded to the nearest tenth is 5.4.
I hope this helps!
Answer:
9x + 3 = 7x + 19
Step-by-step explanation:
Given that,
Jeffrey set up chairs for a meeting.
He arranged the chairs in 9 equal rows but had 3 chairs left over.
Let x be the number of chairs. So,
9x+3 .....(1)
Then he arranged the chairs in 7 equal rows but had 19 chairs left over. So,
7x+19 ......(2)
From equation (1) and (2),
9x+3 = 7x+19
9x-7x = 19-3
2x = 16
x = 8
Hence, the correct option is (b).
Answer:
f
(
2
)
=
20
Explanation:
To evaluate f
(
2
)
substitute x = 2 into f
(
x
)
f
(
2
)
=
(
×
2
2
−
(
4
×
2
×
x
=
28−
8
=
20
20: 1,2,4,5,10,20
28: 1,2,4,7,14,28
