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jolli1 [7]
3 years ago
10

What does " mean in 7x"-21

Mathematics
1 answer:
s2008m [1.1K]3 years ago
5 0
Maybe a mistake? I havent seen a " been used before.
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Despite booming new car sales with their cha-ching
Elena-2011 [213]

Answer to the 1st question: 8 years

Answer to the 2nd question: The year 2022

=======================================================

Further explanation:

x = number of years after 2008

y = average price of a new car

The prices are going up by $1250 per year on average. This is the slope because the slope is the rate of change. So m = 1250.

The y intercept is b = 30100 as this is the price in 2008.

This leads us to go from y = mx+b to y = 1250x+30100

Plug in x = 0 and you should get y = 30100.

Also, plugging x = 6 into the equation leads to y = 37600 to help confirm things.

-----------------

Next, we plug in y = 47600 and solve for x.

y = 1250x+30100

47600 = 1250x+30100

47600-30100 = 1250x

17500 = 1250x

1250x = 17500

x = 17500/1250

x = 14

This means 14 years after the year 2008 is when the average new car price will be $47,600.

2008+14 = 2022

2022-2014 = 8

Therefore, <u>8 years</u> after 2014 (aka the <u>the year 2022</u>) is when the new car average price will be $47,600.

6 0
2 years ago
The floor and ceiling of a room represent planes that are _____
kicyunya [14]
They are parallel planes  
4 0
3 years ago
I need to solve question 3
AlexFokin [52]
3) 3.sec² Ф = 4.tan² Ф
 but sec² Ф = 1/cos² Ф
3/cos² Ф = 4.tan² Ф
3/4 = (tan² Ф).(cos² Ф) ; tan² Ф = sin² Ф/cos² Ф

3/4 = (sin² Ф)x(cos² Ф)/(cos² Ф)

sin² Ф = 3/4 

a) sin Ф = +(√3)/2       and  b) sin Ф = - (√3)/2

 sin Ф = + - (√3)/2 → Ф =π/3 + kπ/3

5 0
3 years ago
Beard bought 10 acres of land.She plans to divide the land into smaller lots that are each 1/20 of an acre.How many smaller lots
stich3 [128]

Answer:She will have:

N = 200 smaller lots

Step-by-step explanation: N = (total acres of land) / (smaller lots of land)

Substituting the values we have:

N = 10 / (1/20)

Rewriting we have:

N = 10 * 20

N = 200 lots

7 0
3 years ago
Pls help simplify:63
IceJOKER [234]

Answer:

3\sqrt{7}

Step-by-step explanation:

7 0
2 years ago
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