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pantera1 [17]
3 years ago
10

I need help on this

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
5 0

Draw a vertical line at the number 4 on your x axis positive side which is x=4

Then anything on the left of this line you just created at x=4 will be less than 4.  But since your inequality is x  less than/equal to 4 it includes 4 as well.

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Use what you have learned to solve the following polynomial equation by either completing the square or using the quadratic form
USPshnik [31]
<span>(x^2-4x-6) factors into:</span>
(x -5.1623)     (x+1.1623)
Therefore x = 5.1623 and      x = -1.1623

(4x^2-8x-2) <span>factors into:
(x -2.2247)  *  (x +2.2474)
</span>
Therefore x = 2.2247   and x=  -0.22474


7 0
3 years ago
A box has three cards numbered 1, 2, and 3
Igoryamba

Answer:

{1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C}

{1C, 2C, 3C}

Step-by-step explanation:

First is all possibilities.  Let's do it one step at a time.  The first step is the number, what are all the numbers that can be chosen?  1 2 and 3.  then, when you pick1, what are all the letters that can be chosen?  A B and C.  Do this for 2 and 3 and you get all possibilities.

{1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C}

When you have steps like this you can multiply the number of results to get the total number of possibilities as well.  Step one has 3 results, step 2 has 3 results, that means there are 3*3 total, which is 9.  Do be careful it matches this  kind of setup, where the step 2 is the same for all step 1s.  So if instead if you got 1 for step 1 you picked from a bag with 3 things, then for 2 you picked from a different bag with a different number, that multiplication trick wouldn't work.

Now just pick throught he sample space to find all with C.  There are three, {1C, 2C, 3C}

7 0
3 years ago
What is the area of a circle with 20cm diameter
lesya [120]
Well that's a 10cm radius and the formula for area of a circle is A= 3.14•R(squared). So to plug that in, that would be 3.14 • 10 squared or 3.14 • 100. 3.14•100=314
7 0
2 years ago
Read 2 more answers
Find X. Round to the nearest tenth.
lina2011 [118]

Answer:

21.4 degrees =x

Step-by-step explanation:

We can use the law of sines to solve this problem

sin A            Sin B

------------ = ----------

a                  b

where A is the angle and a is the opposite side

sin 42           Sin x

------------ = ----------

22                  12

Using cross products

12 sin 42 = 22 sin x

Divide by 22

12/22 sin 42 = 22/22 sin x

12/22 sin 42 =  sin x

Take the arcsin of each side

arcsin (12/22 sin 42) = arcsin( sin x)

arcsin (12/22 sin 42) =  x

21.40637223=x

Rounding to the nearest tenth

21.4 degrees =x

8 0
3 years ago
The bike store marks up the wholesale cost of all of the bikes they sell by 30%.
Luda [366]
$87.5 i believe (sorry if it is wrong)
5 0
3 years ago
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