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Lorico [155]
2 years ago
12

You have 13 different books at home that you can read. You want to pick 2 to read and you don't care about what order you read t

hem. How many different combinations can you read 2 books out of 12?
Mathematics
1 answer:
alexandr402 [8]2 years ago
4 0
I think the answer would be 9
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Solve the equation -31=-6z-4z
jok3333 [9.3K]
<span>-31=-6z-4z
Subtract 4z from -6z
-31=-10z
Divide both sides by -10
Final Answer: 3.1 or 3 1/10</span>
8 0
2 years ago
xand y are light house. y being 20km due east of x and from a ship due south of x the bearing of y was 055°. what is the distanc
leonid [27]

Answer:

I) |xz| ≈ 28.6 km

II) |yz| ≈ 34.8 km

Step-by-step explanation:

Let's assume that the position of ship due south of x is z (aà pictor representation of the question is attached)

|xy| = 20 km, |xz| = ?, |yz| = ?, θ(y) = 55°

Using Trigonometric ratio - SOHCAHTOA

I) Tan θ = |xz| ÷ |xy| ⇒ Tan 55° = |xz| ÷ 20

|xz| = 20 * Tan 55 = 20 * 1.428

|xz| = 28.56 km

|xz| ≈ <u>28.6 km</u>

<u />

II) Cos θ = |xy| ÷ |yz| ⇒ Cos 55° = 20 ÷ |yz|

|yz| * Cos 55° = 20 ⇒ |yz| = 20 ÷ Cos 55°

|yz| = 20 ÷ 0.574 = 34.84 km

|yz| ≈ <u>34.8 km</u>

4 0
3 years ago
An equation is____=540.<br> The solution is x=____.
maks197457 [2]
I believe the equation should be set up like this: 85 + 5x + 5x + 5x - 10 + 5x + 5 = 540. Don't forget to combine like terms! Please let me know by sending me a message if you need any more help :)
7 0
3 years ago
Read 2 more answers
GO.o has 3 orange picks for every 2 green. If there are 25 picks in all, how many picks are orange?
Reika [66]

Given

GO.o has  3 orange picks for every 2 green

there are 25 picks in all

Find out how many picks are orange.

To proof

As given in question

GO.o has  3 orange picks for every 2 green

i.e the ratio of orange to every green becomes

\frac{Orange}{Green}:\frac{3}{2}

total number of picks = 25

let the GO.o pick of  3 orange picks for every 2 green =x

than the equation becomes

3x + 2x = 25

5x = 25

x = 5

Than

the number of oranges = 3x

putting the value  of x

                                     = 15

the number of green = 2x

                                  =  10

thus the 15 picks are orange.

Hence proved

4 0
3 years ago
Read 2 more answers
In which quadrant is the point (-1, 2/9) located
Hoochie [10]

Answer:

2nd Quadrant

Step-by-step explanation:

Points on 2nd quadrant \rightarrow(-x,y)

As we plot the point (-1,\frac{2}{9}) we can see that it lies in the 2nd Quadrant.

3 0
3 years ago
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