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pogonyaev
3 years ago
15

Can somebody help me ???

Mathematics
1 answer:
Ann [662]3 years ago
6 0
It is D because if you look at the graph every 5 years the acres decrease by 20
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- 3(1 – n) =-6 - 6n<br> Step by step please if possible
harkovskaia [24]
-3 + 3n = -6 - 6n. Expand the brackets
3n + 6n = -6 + 3. Collect like terms
9n = -3
n = -3/9 = -1/3
5 0
2 years ago
Suppose you need to get the dent in your car fixed. You see the ads in the newspaper above (mikes repair shop $100 service charg
Norma-Jean [14]

Answer:

<em>Total Cost at Amy's shop is $280 which is less than the total cost at Mike's shop which is $295, so I will take the car to Amy's shop</em>

<em>Point of intersection: (x,y) = (4,360)</em>

Explanation:

Part 1 )

Let x = number of hours worked

Let y = total cost to you

Determining where to take the car:

<em>Total Cost at Amy's shop is $280 which is less than the total cost at Mike's shop which is $295</em>

Mike's repair shop:

Service fee: $100

Per hour rate: $65

Let x is the number of hours worked on. Total cost will be equal to the service fee plus hourly charges. Charges per an hour are $65, so for x hours the charges will be 65x.

Therefore, total cost for Amy's repair shop can be written as:

y = 100 + 65x ------(1)

For 3 hours work: y = 100 + 65(3)

<em>Cost at Mike's, y = $100 + $195 = $295</em>


<em>Amy's repair shop: </em>

Service fee: $40

Per hour rate: $80

Charges per an hour are $40, so for x hours the charges will be 80x.

Therefore, total cost for Amy's repair shop can be written as:

y = 40 + 80x ------(2)

For 3 hours work: x = 3

y = 40 + 80(3)

<em>Cost at Amy's, y  = $40 + $240 = $280</em>


<em>Part 2)</em>

<em>Find the point of intersection</em>

<em>Using elimination method:</em>

<em>y = 100 + 65 x    ------1</em>

<em>y = 40 + 80x      ------2</em>

<em>As the y coefficients are equal we will subtract eq1 from eq2</em>

<em>y - y = 40 + 80x - 100 - 65x</em>

<em>0 = -60 + 15x</em>

60 = 15x

x = \frac{60}{4}

x = 4

put x = 4 in eq 1

we get y = 100 + 65 (4) = 100 + 260 = 360

x = 4, y = 360

Point of intersection: (x,y) = (4,360)



8 0
3 years ago
In august Janet's clothing store sold 234 shirts with the ratio of short sleeves to long sleeves being 9:4. how many short sleev
makvit [3.9K]
162 short sleeve shirts; if you add 9 and 4, you get 13. Then, divide 234 by 13, which equals 18. 18 multiplied by 9 is 162.
3 0
3 years ago
PLEASE HELP AND HELP FAST THIS IS IMPORTANT!!!!!!!
jekas [21]

Answer:

fifth oeriod and jeffersons road

Step-by-step explanation:

because on the first the average is higher and on the second the mean (quadrent 2) is fartheralong than the other road and although the other has an outlier it isnt strong enough to skew the data to being higher

4 0
3 years ago
Write the slope-intercept equation of a line parallel to y = 3x + 2 that
AURORKA [14]
Parallel lines have the same slope, in this case 3.

To find the y intercept we plug in the points (2,1) into y=mx+b, with 2 being x and 1 being y.

1=3(2) + b
Solve this and you get -5 as the y intercept.

The equation is y=3x-5
8 0
3 years ago
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