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Mumz [18]
3 years ago
12

Please Help image below

Mathematics
1 answer:
Nataly_w [17]3 years ago
5 0

Answer:

x = 75 degree

Step-by-step explanation:

Angle between C and B must equal 90 degree.

90- 15 equal 75 degree.

Knowing this angel C and E is equal to angel F and D

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How do I do this? Please explain in detail.
umka2103 [35]
22.5/(x-6) + 22.5/(x+6) = 9
multiply by x-6
=> (x-6)22.5/(x-6) + (x-6)22.5/(x+6) = 9(x-6)
=> 22.5 + (x-6)22.5/(x+6) = 9(x-6)
multiply by x+6
=> (x+6)22.5 + (x+6)(x-6)22.5/(x+6) = 9(x-6)(x+6)
=> (x+6)22.5 + (x-6)22.5 = 9(x-6)(x+6)
distribute
=> 22.5x+6(22.5) + 22.5x - 6(22.5) = 9(x^2 - 36)
=> 45x = 9x^2 - 9(36)
=> 0 = 9x^2 - 45x - 9(36)
divide by 9
=> 0 = x^2 - 5x - 36
=> 0 = x^2 - 5x - 36
=> 0 = (x - 9)(x + 4)
x=9 and -4
8 0
3 years ago
Read 2 more answers
This question relates to concepts covered in Lectures 1 & 2. You can use any of the excel files posted to work through the q
liubo4ka [24]

Answer:

mean of this demand distribution = 100

Step-by-step explanation:

To find the mean of this demand distribution;

Mean = Expected vale = E[x]

for discrete provability function,

we say E[x] = ∑(x.p(x))

x     p(x)     x.p(x)

10     0.1     1

30    0.4    12

60    0.4    24

90    0.7    63

∴ ∑(x.p(x)) = ( 1 + 12 + 24 + 63 )

∑(x.p(x)) = 100

7 0
3 years ago
Molly bought two cabbages for 1.80 how many cabbages could she buy with 28.80
Alika [10]
She can buy 16 cabbages .
3 0
3 years ago
Find the constant of variation k for the direct variation 2x +6y = 0
scoray [572]
<span>A relationship between two variables in which one is a constant multiple of the other. The constant here is also called the constant of variation. In order to obtain this value, we manipulate the equation by isolating the variables. We do as follows:

</span><span>2x +6y = 0
y = -x/3

Therefore, the constant of variation is -1/3. Hope this answers the question. Have a nice day.</span>
5 0
3 years ago
Find an equation for the line that passes through the points (2,-6) and (-4,-4)​
ollegr [7]

Answer:

-1/3 I think

Step-by-step explanation:

use the slope formula

4 0
3 years ago
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