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2 years ago

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Mathematics

2 answers:

Allushta [10]2 years ago

7 0

Answer:

what ????????????????????????????????????????????????/

Step-by-step explanation:

Varvara68 [4.7K]2 years ago

4 0

Answer:

Where's the question?

Step-by-step explanation:

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What is the slope of a line perpendicular to the line whose equation is y = 2x + 5?

ICE Princess25 [194]

Is there a picture for this question?

6 0

3 years ago

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The half price of helium-5 is 7.6 X 10 to the power of negative 22 seconds and the half-life helium -9 is 7 x 10 to the power of

Digiron [165]

Answer:

Approximately 9.211 times

Step-by-step explanation:

Given

$x = 7.6 * 10^{-22}s$ --- half life of helium-5

$y = 7 * 10^{-21}s$ --- half life of helium-9

Required

How many times greater is y than x

To do this, we simply divide y by x

$\frac{y}{x} = \frac{7 * 10^{-21}s}{7.6 * 10^{-22}s}$

$\frac{y}{x} = \frac{7 * 10^{-21}}{7.6 * 10^{-22}}$

Apply law of indices

$\frac{y}{x} = \frac{7 * 10^{-21--22}}{7.6}$

$\frac{y}{x} = \frac{7 * 10^{-21+22}}{7.6}$

$\frac{y}{x} = \frac{7 * 10}{7.6}$

$\frac{y}{x} = \frac{70}{7.6}$

$\frac{y}{x} = 9.211$

5 0

3 years ago

If cos A = 3 over 11, then which of the following is correct?

ziro4ka [17]

Answer: The answer is (a) sec A = 11 over 3.

Step-by-step explanation: Given that Cosine of an angle 'A' is 3 over 11,

i.e.,

$\cos A=\dfrac{3}{11}.$

And we need to find which one of the given four options is correct.

We have the following relations between cosine, secant and cosecant of an angle from trigonometry.

$\sec A=\dfrac{1}{\cos A}~~\textup{and}~~\csc A=\dfrac{1}{\sqrt{1-\cos^2 A}}.$

Therefore,

$\sec A=\dfrac{11}{3}$

and

$\csc A=\dfrac{1}{\sqrt{1-\frac{9}{121}}}=\dfrac{1}{\sqrt{\frac{112}{121}}}=\dfrac{11}{4\sqrt 7}.$

Thus, the correct option is (a) sec A = 11 over 3.

3 0

3 years ago

1. Renting a bicycle at a local Bike shop costs $30 for the first day and $10 for each additional day.

r-ruslan [8.4K]

(a) d=days C=cost

d C
1 30
2 40
3 50
4 60

C=10(d-1)+30

(b) C=10(5-1)+30
C=40+30
C=70

7 0

3 years ago

A scientist begins an experiment with a culture of 5 bacteria cells. Every hour, the number of bacteria cells triples. Which equ

Ann [662]

Answer:

y= 3(5)x

Step-by-step explanation:

5 0

3 years ago