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notka56 [123]
3 years ago
7

Erm I don't understand-

Mathematics
1 answer:
Lana71 [14]3 years ago
6 0

Answer:

1. (7+3)/2

2. 6, 3

3. 5/6

4. 500, 4000

Step-by-step explanation:

1. We are adding 7 and 3 so use the plus sign, THEN we divide by 2

Because we are adding first, put parentheses  

(7+3)/2

2. Nearest whole means whole number (so basically no decimal)

5.823 --> 6 (because 8 is closer to 10 than 0)

3.147 --> 3 (because 1 is closer to 0)

3. 1/3+1/2

Find a common difference, which is 6

Multiply to get 6

1/3*2= 2/6

1/2*3=3/6

3+2=5/6 (when adding keep denominator the same)

4. There are 100 centimeters in a meter

5*100= 500 centimeters

There are 1000 grams in a kilogram

4*1000= 4000 grams

Hope this helps, lemme know if somethings still unclear!!

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Prove the identity arcsin((x-1)/(x+1))=2arctan<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7Bx%7D%20" id="TexFormula1" title=" \
kipiarov [429]
One way would be to notice that both functions have the same derivative and then find out what the "constant" is by plugging in x=0
x
=
0
.

Here's another way. Look at
π2−2arctanx−−√=2(π4−arctanx−−√)=2(arctan1−arctanx−−√).
π
2
−
2
arctan
⁡
x
=
2
(
π
4
−
arctan
⁡
x
)
=
2
(
arctan
⁡
1
−
arctan
⁡
x
)
.
Now remember the identity for the difference of two arctangents:
arctanu−arctanv=arctanu−v1+uv.
arctan
⁡
u
−
arctan
⁡
v
=
arctan
⁡
u
−
v
1
+
u
v
.
(This follows from the usual identity for the tangent of a sum.) The left side above becomes
2arctan1−x−−√1+x−−√.
2
arctan
⁡
1
−
x
1
+
x
.
The double-angle formula for the sine says sin(2u)=2sinucosu
sin
⁡
(
2
u
)
=
2
sin
⁡
u
cos
⁡
u
. Apply that:
sin(2arctan1−x−−√1+x−−√)=2sin(arctan1−x−−√1+x−−√)cos(arctan1−x−−√1+x−−√)
sin
⁡
(
2
arctan
⁡
1
−
x
1
+
x
)
=
2
sin
⁡
(
arctan
⁡
1
−
x
1
+
x
)
cos
⁡
(
arctan
⁡
1
−
x
1
+
x
)
Now remember that sin(arctanu)=u1+u2−−−−−√
sin
⁡
(
arctan
⁡
u
)
=
u
1
+
u
2
and cos(arctanu)=11+u2−−−−−√
cos
⁡
(
arctan
⁡
u
)
=
1
1
+
u
2
Then use algebra:
2⋅(1−x√1+x√)1+(1−x√1+x√)2−−−−−−−−−−√⋅11+(1−x√1+x√)2−−−−−−−−−−√=1−x1+x.
8 0
3 years ago
Meg spent ninety minutes working out at Anytime Fitness.
alexdok [17]

Answer:

54 mins

Step-by-step explanation:

5 0
2 years ago
I need help with thiss plz
Sedaia [141]

Answer:

Mia is right since the x-axis crosses the y-intercept and her line is an inequality.

Step-by-step explanation:

Hope this helps Kait:)

4 0
2 years ago
Read 2 more answers
Please help I have no clue on how to do this.
GREYUIT [131]
The second one

36/25

hope this helps
good luck!!! :))))
4 0
3 years ago
Read 2 more answers
Help please
love history [14]

Answer:

Tallahassee's Range: 6

Key West's Range: 4

Step-by-step explanation:

To calculate range, you'd subtract the lowest value from the highest value

Tallahassee:

Highest Value: 90

Lowest Value: 84

Range: 90 - 84 = 6

Key West:

Highest Value: 87

Lowest Value: 83

Range: 87 - 83 = 4

3 0
2 years ago
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