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1 year ago

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Amtrak trains from Chicago to Portland arrived at Havre, MT, where they make a crew change, the following numbers of minutes lat

e: 26, 17, 245, 19, 38, 42, 11, 0, 14, 44 Find the mean number of minutes late at Havre (to one decimal place).

1 answer:

arsen [322]1 year ago

6 0

Answer:

45.6 min

Step-by-step explanation:

(26+17+245+19+38+42+11+0+14+44) / 10 = 456 / 10 = 45.6

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Billy Jo's school is selling tickets to a Fall Festival. On the first day of ticket sales the school sold 3 adult ticket and 8 s

denis23 [38]

Answer:

Y = 6

Step-by-step explanation:

On the first day of ticket sales the school <em><u>sold 3 </u></em>adult ticket and <em><u>8 student </u></em>tickets for a <em><u>total of $72</u></em>. The school took in <em><u>$152</u></em> on the second day by selling<em><u> 7 adult tickets and 16 student tickets.</u></em> How much is a student ticket?

Day 1: 3x + 7y = 72

Day 2: 7x + 16y = 152

This becomes a system of equations.

3x+8y=72

3x+8y+−8y=72+−8y (Add -8y to both sides)

3x=−8y+72

3x/3 = −(8y+72)/3

X = (-8/3) y + 24

Substitute (-8/3) y + 24 for x in7x+16y=152:

7(-8/3 y + 24) + 16y = 152

-8/3 y + 168 = 152 (Simplify both sides of the equation)

-8/3 y + 168 − 168 = 152 + (−168) (Add -168 to both sides)

-8/3 y = -16

(-8/3 y)/(-8/3 y) = -16/ -8/3 y (Divide both sides by (-8)/3)

<u><em>y = 6</em></u>

<em>If you wanted to keep going...</em>

Substitute 6f or y in x = (-8/3) y + 24

(-8/3) y + 24 = (-8/3) (6) + 24

SImplify: x = 8

<em>X = 8 and </em><u><em>Y = 6</em></u>

<u><em></em></u>

Hope this helps! <em>♥</em>

<u><em>~A.W.E.</em></u><em>S.W.A.N~</em>

6 0

2 years ago

If line b is perpendicular to line a, and line c is perpendicular to line a, what is the slope of line c?

slega [8]

we know that

If line b is perpendicular to line a, and line c is perpendicular to line a,

then

line b and line c are parallel

and two lines parallel have the same slope

so

<u>Find the slope of the line b</u>

Let

$A(-3,-2)\\B(2,3)$

The formula to calculate the slope between two points is equal to

$m=\frac{(y2-y1)}{(x2-x1)}$

$(x1,y1)=(-3,-2)\\(x2,y2)=(2,3)$

substitute

$m=\frac{(3+2)}{(2+3)}$

$m=\frac{(5)}{(5)}$

$m=1$

therefore

<u>the answer is</u>

<u>the slope of the line c is</u>

$mc=1$

8 0

2 years ago

Read 2 more answers

HELP! 50 POINTS!

Alexxandr [17]

(4, -1) ---> x = 4 and y = -1

If you look at the graph you can se this

Mark points (0, 2) and (8, -4) in the coordinate plane

Plot the line going through both of these points.

Read the coordinates of the intersection of the line so you can see the solution!

6 0

1 year ago

If mAC 178°, and mBC= 42°, what is m∠BDC? 110° 65° 68° 136°

Viktor [21]

<span>m∠BDC = 1/2(178 - 42)
</span><span>m∠BDC = 1/2(136)
</span><span>m∠BDC = 68

answer
</span><span>68° </span>

4 0

2 years ago

Read 2 more answers

Rachael ordered early learning software for her daughter from an online retailer. Each item costs $6.50, and there is a shipping

natta225 [31]

Answer:

Step-by-step explanation:

(a)

Total cost = (7 items * Cost per item) + Shipping fee = 7*6.5 + 8.5 = $54

(b)

Modelling the above equation with symbols:

c = s*6.5 + 8.5 = 6.5s + 8.5

(c)

For a total cost of 80$, c = 80:

80 = 6.5s + 8.5

Calculating, we get:

s = 11 items

Rachel ordered a total of 11 items

4 0

1 year ago

Read 2 more answers