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yaroslaw [1]
4 years ago
9

Danny owes his dad $200. He mows lawns after school and on the weekends. He charges $28 a lawn, but pays his friend Sam $12 a la

wn to help. Danny plans to repay his dad with half of what he earns on each lawn. Identify the expression which represents the condition described.
Mathematics
1 answer:
Veseljchak [2.6K]4 years ago
3 0
200 - 8x
200 - (28-12)(.5)x200 - (16)(.5)x200 - 8x
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Assuming a linear relationship between x and y, if the coefficient of correlation (r) equals -0.75, this means that:
Gelneren [198K]

Since we are given that the relationship between x and y is linear. Therefore this means that the given equation takes the form of:

y = m x + b

where,

b is the y intercept of the equation

m is the slope of the equation

 

However we should take note that the slope m is directly proportional to the coefficient of correlation. Since our coefficient of correlation is negative, this only means that the value of y is decreasing with increasing x, hence plot of y and x is descending with increasing x. Furthermore, this also tells that for every 1 unit increase of x, there is a 0.75 units decrease of y.

6 0
3 years ago
Find the product of (x − 5)^2.
Alex17521 [72]
(x - 5)^2 =
(x - 5)(x - 5) =
x^2 - 5x - 5x + 25 =
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8 0
3 years ago
Graph and label Point H at 1.5 , negative 6 thirds
andre [41]
They are actually asking for 1.5 and -2 so the answer will be coordinated at approximately half past 1 and on -2 which is located on the right lower quadrant
7 0
4 years ago
Systems of linear equations iready quiz
saw5 [17]

Answer:

<h2>One solution.</h2>

Step-by-step explanation:

The given question is

<em>Does the following system have One Solution, No Solution, or Infinite Solutions.   </em>

<em />y = 4x + 8\\y = -5x + 3<em />

<em />

<em />

To solve this system, we just need to multiply the first equation by -1, and then sum those equations.

-y = -4x - 8\\y = -5x + 3

0=-9x-5\\5=-9x\\x=-\frac{5}{9}

Then, we use this value to find the other one

y=4x+8\\y=4(-\frac{5}{9} )+8\\y=-\frac{20}{9}+8\\y =\frac{-20+72}{9} \\y=\frac{52}{9}

As you can observe, the system of equations have a unique solution.

Therefore, the answer is one solution.

7 0
4 years ago
Joe has 17 coins, nickels and dimes, that total up to $1.25. How many nickels does he have?
kifflom [539]

Answer:

9 nickels

Step-by-step explanation:

He has 17 coins.

$1.25 is 12 dimes and 1 nickel. But that is only 13 coins.

$1.25 can only be 17 coins if there were 9 nickels and 8 dimes.


6 0
4 years ago
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