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4 years ago

Martin runs 100 meters in 15 seconds. What is the equation for d, the distance in meters that Martin covers per second?

2 answers:

7 0

The answer is d x 15 =100

In order to get the value of d, you must transpose the constant 15 to the left side of the equation.

It can also be written like this:

15d = 100

Divide both sides by 15:

15d / 15 =100/15

d = 6.667 meters per second

zzz [600]4 years ago

7 0

To solve this problem you must apply the proccedure shown below:

1. You have that Martin runs 100 meters in 15 seconds. Therefore, the equation for d, the distance in meters that Martin covers per second is:

dx15=100

2. Therefore, the ansnwer is the third option, which is:dx15=100

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Roman55 [17]

Answer:

(-3,-43) and (3,107)

Step-by-step explanation:

input 25x+32 for y

25x+32=5x²+25x-13

32=5x²-13

-5x²=-45

x²=9

x=+-3

which means you separate the solution

x= -3

x= 3

then input the answers you got for x, in both equations. Then you'll get your y.

y=25(-3)+32

-43

Then check your answer.

Then input the other answer you got for x.

I may be wrong, but I tried and checked my answers.

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4 years ago

Please I have my final now can someone help me with this fast

Mariana [72]

Answer:

option B

Step-by-step explanation:

Given :

$y = \frac{2}{3}x + 3\\\\y = \frac{5}{2}x + \frac{7}{2}\\\\$

Step 1 : simplify the equation :

$3y = 2x + 9\\\\2y = 5x + 7\\$

Step 2: Arrange the terms :

$2x - 3y = - 9\\\\5x -2 y = -7$

Step 3 : Solve for x and y :

2x - 3y = - 9 ------ ( 1 )

5x - 2y = - 7 --------- ( 2 )

_____________________

( 1 ) x 5 => 10x - 15y = - 45 ---------- (3 )

( 2) x 2 => 10x - 4y = - 14 ----------- (4 )

_______________________

( 3 ) - ( 4 ) => 0x - 11y = - 31

- 11 y = - 31

$y = \frac{31}{11}$

Substitute y in ( 1 ) :

2x - 3y = - 9

$2x - 3 (\frac{31}{11}) = - 9\\\\2x = -9 + 3(\frac{31}{11})\\\\2x = - 9 + \frac{93}{11}\\\\2x = \frac{-99 + 93}{11} \\\\2x = \frac{-6}{11} \\\\x = \frac{-6}{2 \times 11} = -\frac{3}{11}$

Therefore the solution to the sytem is $( - \frac{3}{11} , \frac{31}{11})$

The solution of the system of equation is a point which lies

on the both the lines.

Option A : False , It says the solution lies above one of the given line.

But the solution of the system of equation always lies on

both the line.

Option B : True , says the solution is a point on the coordinate plane.

Option C : False, because if the solution is on the x-axis , then

the y coordinate in the solution would be zero.

But it is not zero.

Option D : False , the solution is the point where both the lines intersect.

8 0

3 years ago

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brilliants [131]

Answer:

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Step-by-step explanation:

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qaws [65]

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3 years ago

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