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3 years ago

HELP ASAP question 5!!!

Mathematics

2 answers:

AnnyKZ [126]3 years ago

8 0

Step-by-step explanation:

Total area of merged figure = area of vertical rectangle + area of horizontal rectangle.

$\therefore \: 3x(2x - 7) + (3x + 4)x = 85 \\ \\ \therefore \: 6 {x}^{2} - 21x+ 3 {x}^{2} + 4x = 85 \\ \\ \therefore \: 6 {x}^{2} + 3 {x}^{2} - 21x + 4x - 85 = 0 \\ \\ \huge \red {\boxed {\therefore \: 9 {x}^{2} - 17x - 85 = 0}} \\ hence \: proved.$

docker41 [41]3 years ago

3 0

Answer:

Step-by-step explanation:

(3x + 4)(x) + (2x - 7)(3x) = 85

3x² + 4x + 6x² - 21x = 85

9x² - 17x - 85 = 0

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Step-by-step explanation:

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3 years ago

What are the solutions of the quadratic equation? 4x^2+34x+60=0

insens350 [35]

Answer:

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Step-by-step explanation:

we know that

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$ax^{2} +bx+c=0$

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in this problem we have

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substitute in the formula

$x=\frac{-34(+/-)\sqrt{34^{2}-4(4)(60)}} {2(4)}$

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3 years ago

A tub is filled with 18000 cm3 of water. It loses one-tenth of its water every 12 hours. What volume of water would be remaining

Lina20 [59]

Answer:

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Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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2 years ago

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Serga [27]

Answer:

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Step-by-step explanation:

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remember to cancel out the pi symbols when you are showing your work

(put a line across the pi symbols when dividing)

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A= πr^2 12^2π = 144π

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remember to cancel out the pi symbols when you are showing your work

(put a line across the pi symbols when dividing)

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3 years ago