3 years ago

10.A certain type of bacteria kept at 5°C changes according to the model

Mathematics

1 answer:

pochemuha3 years ago

7 0

Answer:

Is there an abc answer or not if there is i will come back t=an edit it and give the answer.

Step-by-step explanation:

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zhenek [66]

Answer:

Step-by-step explanation:

length = x +x + 2 = 2x + 2

Width = 2+ x

Area of rectangle = length *width

(x +2)(2x + 2) = 110

Use FOIL method

x*2x + x*2 + 2*2x + 2*2 = 110

2x² + <u>2x + 4x</u> + <u>4 - 110</u> = 0 {Combine like terms}

2x² +6x - 106 = 0

a = 2 ; b = 6 ; c = -106

b² - 4ac = 6² - 4*2*(-106)

= 36 + 848

= 884

$\sqrt{b^{2}-4ac}=\sqrt{884}= 29.73$

$x =\dfrac{-b+\sqrt{b^{2}-4ac}}{2a} \ ; \ x==\dfrac{-b-\sqrt{b^{2}-4ac}}{2a}\\\\x = \dfrac{-6+29.73}{2*2} \ ; \ x =\dfrac{-6-29.73}{2*2} \ this \ is \ ignored \ as \ it \ is \ negative\\\\x=\dfrac{23.73}{4};$

x = 5.93 m

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3 years ago

Radius OA of circle O has a slope of 2.5. What is the slope of the line tangent to circle O to point A?

mixer [17]

The tangent at A is perpendicular to OA, so has a slope that is the negative reciprocal of that of the radius: -1/2.5 = -2/5.

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3 years ago

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When you solve a problem involving money,what can a negative answer represents

AveGali [126]

Maybe the money you owe someone

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3 years ago

How to write 770,070 in words

masha68 [24]

Seven hundred and seventy thousand and seventy

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4 years ago

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Mary earns $5 per hour as a waitress. Last week she took home her regular earnings of $5 per hour plus $186 in tips for a total

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291-186=105 (total earned through wages)

105/5=21

Therefore she worked 21 hours

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