3 years ago

I need the answers to

1 answer:

7 0

Take short showers. Turn water off when brushing teeth. Clean dishes quicker. Fix leaks. Use less water when doing laundry.

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If bacteria took 20 minutes to double from 2 to 4, how many bacteria would there be after 1 hour

iren2701 [21]

4 * 2 * 2 * 2 = 32 bacteria

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3 years ago

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Identify each line or segment that intersects ⊙ T. HELP PLEASE!!!

Zarrin [17]

Answer:

The 2 option :)

Step-by-step explanation:

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3 years ago

Each Sunday, Mario weighs himself. Here are his weight changes over a 4-week period.

Dmitry [639]

So the answer is –1.8 +0.9 –1.4 +0.4
or C. -1.9

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3 years ago

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Verify that the roots of 5x²- 6x -2 = 0 are <img src="https://tex.z-dn.net/?f=%5Cfrac%7B3%20%2B%20%5Csqrt%7B19%7D%20%7D%7B5%7D%2

Mice21 [21]

Answer:

Proof below.

Step-by-step explanation:

Quadratic Formula

$x=\dfrac{-b \pm \sqrt{b^2-4ac} }{2a}\quad\textsf{when }\:ax^2+bx+c=0$

Given quadratic equation:

$5x^2-6x-2=0$

Define the variables:

a = 5
b = -6
c = -2

Substitute the defined variables into the quadratic formula and solve for x:

$\implies x=\dfrac{-(-6) \pm \sqrt{(-6)^2-4(5)(-2)}}{2(5)}$

$\implies x=\dfrac{6 \pm \sqrt{36+40}}{10}$

$\implies x=\dfrac{6 \pm \sqrt{76}}{10}$

$\implies x=\dfrac{6 \pm \sqrt{4 \cdot 19}}{10}$

$\implies x=\dfrac{6 \pm \sqrt{4}\sqrt{19}}{10}$

$\implies x=\dfrac{6 \pm2\sqrt{19}}{10}$

$\implies x=\dfrac{3 \pm \sqrt{19}}{5}$

Therefore, the exact solutions to the given quadratic equation are:

$x=\dfrac{3 + \sqrt{19}}{5} \:\textsf{ and }\:x=\dfrac{3 - \sqrt{19}}{5}$

Learn more about the quadratic formula here:

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2 years ago

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Write the first four multiples of each number. 1. 3 2. 4 3. 8 4. 15

Levart [38]

Answer:

3, 6, 9, 12

4, 8, 12, 16

8, 16, 24, 32

15, 30, 45, 60

Step-by-step explanation:

multiply each number by itself

5 0

3 years ago