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3 years ago

Helppppppppppp!!!!!

Mathematics

2 answers:

Delvig [45]3 years ago

4 0

Answer:

$n ^{2} + 7n + 1 \\ where \: the \: value \: of \: n = - 3 \\ n ^{2} + 7n + 1 \\ = - 3^{2} + 7( - 3) + 1 \\ = - 9 - 21 + 1 \\ = - 29$

gtnhenbr [62]3 years ago

4 0

Answer:

-11

Step-by-step explanation:

1.) If n=(-3) in $n^{2} +7n+1$

2.) Plug in your value for "n".

3.) $(-3)^{2}+ 7(-3) +1$

4.) Evaluate

5.) $n^{2} +7n+1 =(-11)$

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How do I solve u=vw+z, for v.

AVprozaik [17]

U = vw + z

vw + z = u |subtract z from both sides

vw = u - z |divide both sides by w

v = (u - z)/w

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3 years ago

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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?

kipiarov [429]

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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3 years ago

Valentin [98]

Answer:

et55

Step-by-step explanation:

3 0

3 years ago

5. What is the y-intercept of the line of best fit?

Verizon [17]

6. The y-intercept is 8

7. the slope is -1/2

8. Equation of line is: $y = -\frac{1}{2}x+8$

Step-by-step explanation:

Let us define y-intercept first

The y-intercept of the line is where the line intersects the y-axis.

5. What is the y-intercept of the line of best fit?

The given line on graph intersects the y-axis on 8 so the y intercept of the line of best fit is 8

6. What is the slope of the line of best fit for this scatter plot?

The slope can be calculated by locating two points on line.

In the given line, we can easily observe two points

(2,7) and (4,6)

The slope is calculated by the formula

$m=\frac{y_2-y_1}{x_2-x_1}$

Here (x1, y1) are the coordinates of first point on line and (x2,y2) are the coordinated of second point on line

So, putting the values

$m=\frac{6-7}{4-2}\\=\frac{-1}{2}\\=-\frac{1}{2}$

7. What is the equation of the line of best fit?

The slope intercept form of any line is given by:

$y=mx+b$

where m is slope and b is y-intercept of the line

As we already know

m = -1/2 and y-intercept is 8

Putting the values in the equation

$y = -\frac{1}{2}x+8$

Keywords: Equation of line, Slope

Learn more about equation of line at:

#LearnwithBrainly

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4 years ago

PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU B

Maru [420]

Answer:

a^2 b^7

Step-by-step explanation:

a^3/a + b^9/b^2 = a^2 b^7

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3 years ago

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