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nadezda [96]
2 years ago
14

Jenna is twice as far from the finish line as she is from the start of a 10 km race. how far has she ran?

Mathematics
1 answer:
kipiarov [429]2 years ago
8 0
If she is still twice as far from the finish as she is from the start,
then she has run one-third of the course so far, and has two-thirds
left to go.

1/3 of 10 km = 10/3 km = 3 and 1/3 km,  or    3,333 and 1/3 meters .
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Answer:

Equivalent expression of 9(2a+1) is, 18a+9

Step-by-step explanation:

The distributive property says that:

a \cdot (b+c) = a\cdot b + a\cdot c

Given the expression: 9(2a+1)

Apply the distributive property:

9 \cdot (2a) +9 \cdot 1

Simplify:

18a+9

Therefore, the equivalent expression of 9(2a+1) is, 18a+9

8 0
3 years ago
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Find the line y=a+bx which best approximates the data points
Vika [28.1K]

Answer:

y = 11.84x - 32.71

Step-by-step explanation:

Here, the given data points,

(−3,−70),(−1,−42),(1,−21),(2,−9),(4,14),

Let x represents the input value and y represents the output value,

So, the table that represents the given situation is,

x         -3            -1             1             2             4

y       -70          -42         -21         -9             14

By the above table,

\sum x=3

\sum y=-128

\sum xy = 269

\sum x^2=31

\sum y^2 = 7382

Let the equation of the line is,

y = bx + a

Where,

a=\frac{\sum y \sum x^2 - \sum x\sum xy}{n(\sum x^2)-(sum x)^2}

b=\frac{n\sum xy - \sum x \sumy}{n(\sum x^2)-(\sum x)^2}

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By substituting the values we get,

a = - 32.70547945 ≈ - 32.71,

b = 11.84246575 ≈ 11.84,

Hence, the equation of line would be,

y = 11.84x - 32.71

8 0
2 years ago
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4 0
3 years ago
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ehidna [41]

Answer:

The possible answers are

15

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Step-by-step explanation:

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