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evablogger [386]

2 years ago

9

An earthquake near the Philippines measured 5.1 on the Richter scale. Use the formula R=log(A/Ao) to determine approximately how

many times stronger the wave amplitude A of the earthquake was than Ao.

1 answer:

hammer [34]2 years ago

3 0

Answer:

If R is equal 5.1, Let x be A/A0

Then we have logx=5.1

Solving this we have x=125893

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weqwewe [10]

$QUADRATIC \: \: RESOLUTIONS \\ \\ \\ Given \: \:expression - \\ \\ \frac{1}{a} + \frac{1}{b} + \frac{1}{c} = \frac{1}{a + b + x} \\ \\ \frac{1}{a} + \frac{1}{b} = \frac{1}{a + b + x} - \frac{1}{x} \\ \\ \frac{a + b}{ab} = \frac{ - (a + b)}{x(a + b + x)} \\ \\ \frac{1}{ab} = \frac{ - 1}{x(a + b + x)} \\ \\ Simplifying \: \: above \: \: expression \: \: , \: \\ \\ We \: get \: a \: Quadratic \: equation \: - \\ \\ {x}^{2} + (a + b)x + ab = 0 \\ \\ (x + a)(x + b) = 0 \\ \\ \\ || \: \: \: x = - a \: \: \: || \: \: \: x = - b \: \: \: || \: \: \: \: \: \: \: \: \: \: \: Ans.$

5 0

2 years ago

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Find an equation of the line perpendicular to y = -1/2x – 3 that crosses the point

alisha [4.7K]

Answer:

<em>y = 2x + 4 </em>

Step-by-step explanation:

y = - $\frac{1}{2}$ x - 3

Slope of perpendicular line is "2"

( - 3 , - 2 )

y + 2 = 2( x + 3 )

<em>y = 2x + 4</em>

6 0

2 years ago

Select whether each equation has no solution, one solution, or infinitely many solutions.

xxTIMURxx [149]

Answer:

Step-by-step explanation:

A) 5x - 7 = 5x becomes -7 = 0 if 5x is subtracted from both sides. This result is never true, so NO SOLUTION

B)3x−9=3(x−3) Performing the indicated multiplication, we get

3x - 9 = 3x - 9. This is always true, so there are INFINITELY MANY SOLUTIONS

C)2x−6=−2(x−3) Performing the indicated multiplication, we get

2x - 6 = -2x + 6. Adding 2x - 6 to both sides results in

4x - 12 = 0, or 4x = 12. Thus, the solution is x = 3. ONE SOLUTION

D)2x+6−5x=−3(x This equation is incomplete

3 0

2 years ago

Read 2 more answers

3. Lucas bought grapes to bring to his class party. After the party,

Paul [167]

Answer: 4.2 lbs

Step-by-step explanation:

Amount of grapes he had (in pounds) = 1.9 + 2.3 pounds

Amount of grapes he had (in pounds) = 4.2 pounds

4 0

2 years ago

Which of the following is NOT a solution to the linear equation y=3x+2?

Ipatiy [6.2K]

Answer:

(3,10)

Step-by-step explanation:

When x is 3

${ \bf{y = 3x + 2}} \\ { \bf{y = (3 \times 3) + 2}} \\ { \bf{y = 11}}$

y is 11, and this is invalid because it is not at accord.

6 0

2 years ago

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