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gladu [14]
2 years ago
7

Please help with this:)

Mathematics
1 answer:
Nat2105 [25]2 years ago
6 0

Answer:

area = 2 \times 6 \times \pi = 12\pi

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Solving by elimination <br> 5x+2y= -3<br> 3x+3y=9<br> please help me solve x and y
-Dominant- [34]
1) -3(5x+2y=-3)⇒ -15x-6y=9
                                             ⇒ -9x=27
     2(3x+3y=9)⇒ 6x+6y=18

2) -9x/-9=27/-9 ⇒ x=-3 

3) 3(-3)+3y=9⇒ -9+9+3y=9+9⇒ 3y/3=18/3⇒ y=6

Answer: (-3,6)

Reasoning:
Step 1) In order to eliminate, first I had to multiple the first equation by -3 and the second by 2 so that when combining the equations y would cancel each other out so that I could solve for x. <em>Note: There are many combinations as to how you could multiple the equations so that either the x or y would cancel out.
</em>
Step 2) Once y is eliminated, solve for x.

Step 3) Now plug x back into one of the original equations and solve for y. <em>Note: Plug x back into one of the original equations, not the equations that were changed by multiplication,</em> 

6 0
3 years ago
What is the perimeter of the triangle in the diagram?<br><br><br> a + b + <br> a2 + b2<br> 2(a + b)
inn [45]
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(this is 6th grade math) please help​
madam [21]

Answer:

c

Step-by-step explanation:

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3 years ago
Geometry question 3, Thanks if you answer or help!
shepuryov [24]

Answer:

67°

Step-by-step explanation:

Angles on a straight line add to 180, so:

A + D = 180

D = 180 - A

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