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3 years ago

Please helpppp Extra points and brainleist

Mathematics

1 answer:

vladimir1956 [14]3 years ago

5 0

Answer:

Step-by-step explanation:

x² - 4x - 7 = 0

(x - 2)² = 11

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PLZ HELP RN ILL MARK YOU BRAINLIST IF ITS RIGHT PLZZZ IM DESPERATE

emmasim [6.3K]

Answer:

w = -0.5

Step-by-step explanation:

Divide the entire equation by -6.8 to cancel it out and get your "w" variable alone.

w = -0.5

8 0

3 years ago

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Finding lengths. Write similarity statements for three triangles in the diagram. then find the given length. Find HF

SOVA2 [1]

Answer:

HF = 15??

Step-by-step explanation:

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2 years ago

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How many secare in 35 min?

Wewaii [24]

60 seconds are in each minute. To find the number of seconds in 35 minutes, you multiply 60 (seconds) by 35 (minutes.) The answer is 2,100 seconds.

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4 years ago

Carbon-14 has a half-life of 5720 years and this is a first order reaction. If a piece of wood has converted 75% of the carbon-1

Doss [256]

The amount of the substance (At) at any time t is calculated through the equation,
At = (A0)(e^-kt)
where A0 is the initial amount and k is constant.

For the half-life,
ln (At / A0) = ln 0.5 = -k(5270 years)
The value of k is 1.3153x10^-4 / year.
Substituting this value to the same equation, where At = 0.25A0
ln 0.25 = -(1.3153 x 10^-4)(t)
The value of t from this equation is 10540 years. The closest value to this is letter A.

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3 years ago

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Help pls........................

Alina [70]

The difference of 2.5 x $10^{4}$ - 1.5 x 10³ is 2.35 x $10^{4}$ .

<h3>What is the difference?</h3>

Difference is the result of the subtraction of two or more numbers. The numbers are written in scientific notation. Scientific notation is a method that is used to write large numbers.

The exponent of the numbers have different value. In order to evaluate them, they have to have the same values.

2.5 x $10^{4}$ - 1.5 x 10³

2.5 x $10^{4}$ - 0.15 x $10^{4}$

2.35 x $10^{4}$

To learn more about scientific notation, please check: brainly.com/question/25334755

#SPJ1

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1 year ago