3 years ago

5c +2d=13 2c + 4d = -6

Mathematics

1 answer:

Margarita [4]3 years ago

4 0

Answer:

combine like terms and u'll have ur answer

Step-by-step explanation:

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Solve the following equation-8=(10x-22)/11

Evgen [1.6K]

-8 = (10x - 22)/11

Multiply both sides by 11:
-88 = 10x - 22

Add 22 to both sides:
-66 = 10x

Divide both sides by 10
-6.6 = x

Hope it helped :)

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3 years ago

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What is the vertex of the graph of the equation y= 3x^2+6x+1

Kobotan [32]

$y=a(x-h)^2+k \Rightarrow \hbox{vertex}=(h,k)\\y= 3x^2+6x+1\\ y=3x^2+6x+3-2\\ y=3(x^2+2x+1)-2\\ y=3(x+1)^2-2\Rightarrow h=-1,k=-2\\\\ (-1,-2)$

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3 years ago

Find the value of x that makes the equation true<br> 3(-2 + 1 ) + 5 = 3x -4 - 5x

miv72 [106K]

Answer:

$x = - 3$

Step-by-step explanation:

Reason

$3( - 2 + 1) + 5 = 3x - 4 - 5x \\ open \: the \: bracket \: at \: the \: lhs \\ - 6 + 3 + 5 = 3x - 4 - 5x \\ 2 = 3x - 4 - 5x \\ collect \: like \: terms \\ 2 + 4 = 3x - 5x \\ 6 = - 2x \\ 2x = - 6 \\ divide \: both \: sides \: by \: 2 \\ \frac{2x}{2} = \frac{ - 6}{2} \\ x = - 3$

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3 years ago

Suppose DK is an angle bisector of △DEF. Given: EK=2, FK=5, DF=10. Find DE.

Inessa [10]

Answer:

DE = 4

Step-by-step explanation:

The bisector divides the triangle into proportional segments, so ...

FK/DF = EK/DE

5/10 = 2/DE . . . . substitute given values

DE = 4 . . . . . multiply by 2DE

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3 years ago