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3 years ago

(12y²+17y-4)+(9y²-13y+3)

Mathematics

1 answer:

PSYCHO15rus [73]3 years ago

5 0

(12y^2 + 17y - 4) + (9y^2 - 13y + 3)

= 12y^2 + 17y - 4 + 9y^2 - 13y + 3

= 21y^2 + 4y - 1

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The diagonal of a square is 27 cm long. The diagonal of a smaller square is 12 cm long. What is the difference between the lengt

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length of big square

$\sqrt{27} = 5.2$

length of small square

$\sqrt{12 } = 3.5$

difference between length of two square

=5.2-3.5

=1.7

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3 years ago

Simplify <br> -4x+2x2-x2+5-3x

Serga [27]

Answer:

9 - 7x - x²

Step-by-step explanation:

-4x+2x2-x²+5-3x = -4x-3x+2x2+5-x²

I arranged the like terms together so it is easier to do the calculations.

-4x-3x+2x2+5-x² = -7x+4+5-x²

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3 years ago

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Question 3

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Answer:

Step-by-step explanation:

Big Brain

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3 years ago

The sides of △FGH are FG = 6 x+ 7, GH = 8x - 5, and FH = 10x - 11. If the perimeter of △FGH is 87, list the angles in order from

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Answer:

From largest to smallest: FG, FH, GH

Step-by-step explanation:

Given

$FG = 6x + 7$

$GH = 8x - 5$

$FH = 10x - 11$

$Perimeter = 87$

Required

Order the sides in descending order

First, we need to solve for x.

Perimeter of FGH is calculated as thus:

$Perimeter = FG + GH + FH$

Substitute values for FG, GH, FH and Perimeter

$87 = 6x + 7 + 8x - 5 + 10x - 11$

Collect Like Terms

$87 - 7 + 5 + 11= 6x + 8x + 10x$

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Reorder

$24x = 96$

Divide through by 24

$x = 96/24$

$x = 4$

Substitute 4 for x in FG, GH and FH

$FG = 6x + 7$

$FG = 6 * 4 + 7$

$FG = 24 + 7$

$FG =31$

$GH = 8x - 5$

$GH = 8 * 4 - 5$

$GH = 32 - 5$

$GH = 27$

$FH = 10x - 11$

$FH = 10*4 - 11$

$FH = 40 - 11$

$FH = 29$

In order of arrangement in descending order, we have:

$FG =31$ $FH = 29$ $GH = 27$

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3 years ago

A commercial property purchased for 1.2 million is revalued at 995,000. Calculate the percentage decrease in the property’s valu

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Answer:

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Step-by-step explanation:

First: work out the difference (decrease) between the two numbers you are comparing. Then: divide the decrease by the original number and multiply the answer by 100.

First:

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Then:

205,000 / 1,200,000 = 0.17

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(12y²+17y-4)+(9y²-13y+3)​

(12y²+17y-4)+(9y²-13y+3)