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enyata [817]
3 years ago
10

What is x+y=-20 and 6x-5y=-20 with elimination method

Mathematics
1 answer:
Lerok [7]3 years ago
4 0

Answer:

Step-by-step explanation:

x + y = -20......multiply by -6

6x - 5y = -20

-----------------

-6x - 6y = 120 (result of multiplying by -6)

6x - 5y = -20

---------------add

-11y = 100

y = -100/11 <======

x + y = -20

x + (-100/11) = -20

x - 100/11 = -20

x = -20 + 100/11

x = -220/11 + 100/11

x = - 120/11 <========

solution is : x = -100/11 and y = -120/11 or (-120/11 , -100/11)

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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and this triangle is a right triangle so side A=B

that means the other leg is 6.Knowing that we can solve

The formula for the area of a triangle is (base×height)÷2

so that means 6×6 equals 36 and if you divide that by 2 you get the 18.

Now we will deal with the semicircle. We know that both of the legs are 6 so that means the diameter is 6 and now we solve 6 divided by 2 equals 3 and we will have to square that and we will 9 and since it is a semicircle we have to divide it by 2  and that will give us 4.5 and since we have to express it in terms of pi it will be 4.5(pi) and then we add both of the areas

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8 0
3 years ago
I NEED HELP ASAP!! WILL MAKE YOU BRAINLIEST IF RIGHT +40 points!
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The standard form of a quadratic equation is ,

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