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EleoNora [17]
3 years ago
9

SOLVE THIS TO PROVE YOUR GOOD AT MATHS! (click the image attached)

Mathematics
1 answer:
schepotkina [342]3 years ago
4 0

Answer:

total area of compound ABCDEF=36cm³

x(x-4)+(x-2)(2x+x)=36cm³

x²-4x+2x(x-2)+x(x-2)=36cm³

x²-4x+2x²-4x+x²-2x=36cm³

4x²-10x=36cm²

4x²-10x-36=0

2(2x²-5x-18)=0

2x²-5x-18=0÷3

2x²-5x-18=0proved.

2x²-(9-4)x-18=0

2x²-9x+4x-18=0

x(2x-9)+2(2x-9)=0

(2x-9)(x+2)=0

either

x=-2(negleted)

or

x=9÷2=4.5cm

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There are 10 playing cards in a bag. 7 of those cards are spades.
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Answer:

P(spades) = 7/10

Step-by-step explanation:

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insens350 [35]

The general form for a line through two points (a,b) and (c,d) is

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This is better than the slope forms because it works in the no slope case, as does the standard form.

If you haven't seen it before, it works because when (x,y)=(a,b) we get (c-a)(b-b)=(d-b)(a-a), both sides zero, and when (x,y)=(c,d) we get (c-a)(d-b)=(d-b)(c-a), clearly equal sides.

Here we have

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Answer: 9x + 5y = -45

Check:

We check each point is on the line

(-5,0)

9(-5) + 5(0) = -45, good

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9(0) + 5(-9) = -45, good again


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