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4 years ago

What is the value of x

Mathematics

1 answer:

ValentinkaMS [17]4 years ago

7 0

Answer:

Step-by-step explanation:

There are 7 sides to this polygon. Forget all the lettering on the figure. Concentrate on the number of triangles you can count. There are 5 of them. Each one has 180 degrees. So the total number of degrees on the interior of the figure is

5 * 180 = 900

All you have to do is add up all the angles including the x and equate them to 900

x + 146 + 122 +142+ 140 + 110 + 142 = 900 Collect the terms on the left.

x + 802 = 900 Subtract 802 from both sides

x = 900 - 802

x = 98

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3 years ago

What is the solutions to 0=x^2-x-6 two things ,,quadratic equationz,,,

natita [175]

Answer:

x1=3. x2=-2

Step-by-step explanation:

$x = \frac{ - b + - \sqrt{b {}^{2} - 4ac } }{2a}$

b=-1

a=1

c=-6

$x = \frac{ - ( - 1) + - \sqrt{ {( - 1)}^{2} - 4 \times 1 \times ( - 6) } }{2 \times 1}$

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3 years ago

What is the answer? -9=3+6x

HACTEHA [7]

Use inverse operations and subtract 3 from 9 which is -12 then divide -12 by 6 which is -2
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-12=6x
-12/6=6x/6
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6 0

3 years ago

A bag contains 10 marbles: 3 are green, 2 are red, and 5 are blue. Jose chooses a marble at random, and without putting it back,

Ludmilka [50]

We know that
g=3
r=2
b=5
total marbies=g+r+b------> 3+2+5----> 10

a) probability that the first marble is red
P(red)=r/total marbies------------> 2/10-----> 1/5

b) probability that the second marble is blue
in this case total marbles-------> 9
P(blue)=b/total marbles----------> 5/9

c) the probability that the first marble is red and the second is blue
(1/5)*(5/9)=1/9

the answer is
1/9

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3 years ago