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3 years ago

PLEASE HELPPP! TWO DIFFERENT GRAPHS, TWO DIFFERENT QUESTIONS,

Mathematics

1 answer:

timurjin [86]3 years ago

4 0

Answer:

I am not 100%

#1 = C,D,E

#2 = 1/2

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if there are 2040 seats in a section of a stadium, 20 seats in the first row, and 4 more seats in each row, how many rows are th

Lorico [155]

2040 = n/2(20+(n-1)4)

4080 = n(20+4n-4)

4080= 20n +4n^2 -4n

1020 = 4n + n^2

n^2 +4n -1020 =0

use common formula (can't write out so just look at answers. sorry)

which gives answers of n=-34 and n=30. since n can only be positive, n=30 so there are 30 rows. I liked that challenge

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3 years ago

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Please answer this question! 20 points and brainliest!

azamat

Step-by-step explanation:

You have to substitute... 0, 5, & 10, & 3

y = 2x + 3

y = 2(0) + 3

y = 0 + 3

y = 3

(0,3)

y = 2x + 3

y = 2(5) + 3

y = 10 + 3

y = 13

(5,13)

y = 2x + 3

y = 2(10) + 3

y = 20 + 3

y = 23

(10,23)

y = 2x + 3

y = 2(3) + 3

y = 6 + 3

y = 9

(3,9)

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3 years ago

Find the mean of the data in the dot plot below. \text{ g} gstart text, space, g, end text

kicyunya [14]

Answer: 40.5

Step-by-step explanation: If it help please thanks me!

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3 years ago

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(06.04 MC) Dennis drew the line of best fit on the scatter plot shown below: What is the approximate equation of this line of be

elena-14-01-66 [18.8K]

Answer:

Step-by-step explanation:

In order to write the equation of this line, we need to pick 2 points on the graph where the line goes right through the intersection of the grids. Actually, you only need 1 of these, because the line goes through at (0, 15). Another point then can be (6, 6). Locate this point so you know what I means when I say that the line goes right through where the grids intersect at x = 6 and y = 6 (as opposed to somewhere in the middle of one of these grids). Find the slope between these 2 points:

$m=\frac{6-15}{6-0}=-\frac{9}{6}=-\frac{3}{2}$

Since there's only one choice with that slope, that is the choice you want.

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3 years ago

The winning car in a race traveled the race distance of 450 miles at an average speed of 120 miles per hour (mph). The car finis

lozanna [386]

Answer:b

Step-by-step explanation:

450 divide by 4 hours and 30 minutes is 100 because 4 hours and 30 minutes is 4.5 hours so 450/4.5 is 100

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3 years ago