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In-s [12.5K]
3 years ago
10

An earthquake wave travels through 55 km of rock in 25 seconds . Which equation represents the relationship between t, the numbe

r of seconds, and d, the total distance the wave travels?
Mathematics
1 answer:
ira [324]3 years ago
6 0

Answer:

2.2 m/s

Step-by-step explanation:

Step one

Given data

An earthquake wave travels through 55 km

hence distance = 55 km

time taken = 25 seconds

<u>Required</u>

<u>the expression relating t and d</u>

Step two:

we know that velocity is

Speed= distance/time

speed= 55/25

Speed= 2.2 m/s

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-1/4x – 2/3x = -6 + 28
77julia77 [94]

Answer:

x= -24

Step-by-step explanation:

-1/4x-2/3x= -6+28

add -6 to 28 but since 6 is a negative its subtraction

-1/4x-2/3x=22

multiply all by 12

-3x-8x=264

add -3x to -8x

-11x=264

divide both sides by -11

x= -24

3 0
3 years ago
Factor each expression 30+10x-40y
Sergio039 [100]
Hello!

To factor you find the biggest number they can be divided by

The biggest number that all the number can be divided by is 10

You put that outside parenthesis

10()

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3 + x - 4y

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Hope this helps!
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3 years ago
How do you find the range of a linear graph
LUCKY_DIMON [66]
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3 years ago
Find an equation of the parabola with focus (2, −3) and directrix y = 1.
Likurg_2 [28]

Answer:

Step-by-step explanation:

The correct option is option (C).

The required equation of the parabola is

Step-by-step explanation:

Formula:

The distance of a point (x₁,y₁) from a line ax+by+c=0 is

.

The distance between two points (x₁,y₁) and (x₂,y₂) is

Given that, the focus of the parabola is (2,3) and directrix y= - 1.

We know that, a parabola is the locus of points that equidistant from the directrix and the focus.

Let any point on the parabola be  P(x,y)  .

The distance of P from the directrix is

           

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The distance of the point P from the focus (2,3) is

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5 0
3 years ago
Solve by factoring:<br> 5t=t ^2
elena-14-01-66 [18.8K]

Answer:

t=0 and t=5

Step-by-step explanation:

5t = t^2

Subtract 5t from each side

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Using the zero product property

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t=0  and  t-5+5=0+5

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7 0
3 years ago
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