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Ganezh [65]
3 years ago
11

After running for 3 1/2 km, Sacha only completed half the total distance of a marathon . What is the complete distance of that m

arathon? And please don't send in file you can comment and tell me what to do okay​
Mathematics
2 answers:
Lemur [1.5K]3 years ago
8 0

Step-by-step explanation:

Lets x be the distance for the marathon.

Given,

\frac{1}{2} x = 3.5km

x = 3.5 \div  \frac{1}{2}  \\  = 3.5 \times 2 \\  = 7km

Gre4nikov [31]3 years ago
3 0

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer: 7 km

Explanation:

3.5 x 2 = 7

I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

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Answer:

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Step 3: Rewrite perpendicular line

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3 years ago
Write an equation in slope-intercept form of the line that passes through the points (-2, - 11) and (3,9).
I am Lyosha [343]

Answer:

y = 4x - 3

Step-by-step explanation:

(-2, -11) & (3, 9)

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Plug in these values:

(9 - (-11)) / (3 - (-2))

Simplify the parentheses.

= (20) / (5)

Simplify the fraction.

20/5

= 4

This is your slope. Plug this value into the standard slope-intercept equation of y = mx + b.

y = 4x + b

To find b, we want to plug in a value that we know is on this line: in this case, I will use the second point (3, 9). Plug in the x and y values into the x and y of the standard equation.

9 = 4(3) + b

To find b, multiply the slope and the input of x(3)

9 = 12 + b

Now, subtract 12 from both sides to isolate b.

-3 = b

Plug this into your standard equation.

y = 4x - 3

This is your equation.

Check this by plugging in the other point you have not checked yet (-2, -11).

y = 4x - 3

-11 = 4(-2) -3

-11 = -8 - 3

-11 = -11

Your equation is correct.

Hope this helps!

8 0
3 years ago
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