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Katen [24]
3 years ago
9

How to do this? or get this started?

Mathematics
2 answers:
Marat540 [252]3 years ago
8 0
Supplementary is two angles that equal 180 degrees.

Angle AOC + Angle COB = 180

2x + x + 90 = 180
3x = 90
x = 30

Once you know x, you can probably find the rest :)
Ne4ueva [31]3 years ago
3 0
You're right on what you've been doing

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7 times a number is 18 less than the square of that number. Find the positive solution.
Arte-miy333 [17]
So 7 x = x2 -18 so you get the quadratic x^2 -7x -18 and then get 2 x -9= -18 and 2 + -9 = -7 so you get (x + 2) ( x - 9) so the positive solution would be x-9 = 0 so x= 9. Hope this helps :)
7 0
3 years ago
What are significant numbers? please explain?
My name is Ann [436]
Non zero digits are always significant. any zeros between two significant digits are significant. a final zero or trailing zero in the decimal portion only are significant.
6 0
4 years ago
I need help finding the Min of these numbers.
olganol [36]

Answer:

Step-by-step explanation:

The minimum (or min) of a set of numbers is the number with the smallest value in the set.

In this case, the smallest number in the set is 22.

5 0
3 years ago
Ben made a model (shown below) of the square pyramid he plans to build when he grows up.
elena-s [515]

Answer:

336 m^2

Step-by-step explanation:

The surface area of a square pyramid is the sum of the area of the squared base + 4 times the area of each triangular face, therefore:

A=A_b + 4A_t

where:

A_b=L^2 is the area of the base, where

L is the length of the base

A_t=\frac{1}{2}Lh is the area of each triangular face, where

h is the height of the face

Substituting,

A=L^2+2Lh

For the model in this problem,

L = 12

h = 8

Therefore, the surface area here is:

A=12^2 +2(12)(8)=336

4 0
3 years ago
Read 2 more answers
Y=4x-2 y= 3x+1? What’s the (x,y)?
erik [133]
Idk this cause my teacher. Any teach
8 0
3 years ago
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