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Hatshy [7]
3 years ago
15

ANSWER 22 PLEASE...

Mathematics
1 answer:
julia-pushkina [17]3 years ago
5 0
A. Is a congruent triangle
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What’s the mean of 39,49,50,28,55,62,35,27,51
ra1l [238]
Answer: the mean is 44
Explanation: add up all the numbers and then divide by how many numbers there are
3 0
3 years ago
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A plumber charges $130 2 hours of work and $235 for 5 hours of workWhat is the of change in dollars per hour
kogti [31]

Answer:

235

Step-by-step explanation:

Figure the rates per hr.

110/3 = 36 2/3

160/5 = 32.

So, the rates are not the same.

Knowing a bit about plumbers, they normally charge a basic fee to just show up, and then they charge per hr.

In cases like these, where we're asked to project to a new data point (in this case an 8-hr job), you should immediately think of a graph. The x-axis would be the hours worked. The y-axis would be the charge for the work (the cost of the job).

We're given two pairs of values:

(3,110) and (5,160).

The next step is to fit a line to them.

y = mx+b is the general equation for a line.

m = the slope = rise/run = change in y / change in x

Call the change in y, dy (for delta y).

Call the change in x, dx (for delta x).

m = dy/dx = 50/2 = 25

The slope is thus 25, which means for each hour, the price goes up by $25. That means the plumber charges $25/hr.

We also know the plumber charges $110 for a 3-hr job. 3*25 = $75. So the base charge would be $110-75 = $35.

y = 25x + 35

Checking this formula at x=3, we know it is 110.

Checking it at x=5, we obtain:

y = 25*5 + 35 = 125 + 35 = 160.

That checks.

Now to figure an 8-hr job, set x=8 and use the equation"

y = 25*8 + 35.

y = 200 + 35.

y = 235.

That means an 8-hr job costs $235.

3 0
3 years ago
If x² + xy = 62, y2 + xy = 82 then find
ad-work [718]
<h2>answer;</h2><h2>B) 12</h2>

<h2>_________</h2><h2><em>explanation</em><em>:</em><em>:</em><em>:</em></h2>

after adding both equation

we \: get..

<h2> {x}^{2} + xy + {y}^{2} + xy = 62 + 82 </h2><h2> x^2 + y^2 + 2xy = 144 </h2><h2> (x + y)^2 = 144 </h2><h2>(x + y) = sqrt{144} </h2><h2> x + y = 12</h2>

<h2><em>it</em><em> </em><em>may</em><em> </em><em>be</em><em> </em><em>helpful</em><em> </em><em>for</em><em> </em><em>u</em></h2><h2><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>❤</em><em>❤</em><em>❤</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em></h2><h2><u><em>plzzz</em><em> </em><em>mar</em><em> </em><em>it</em><em> </em><em>as</em><em> </em><em>a</em><em> </em><em>brilliant</em><em> </em><em>ans</em></u></h2>
5 0
2 years ago
Taylor bought 200 shares of stock for $18.12 per share last year. He paid his broker a flat fee of $30. He sold te stock this mo
rusak2 [61]
The answer is $3990 heres why

First you need to find out what is the total you paied for the shares
$18.12x200= $3624

Then you need to add the flat fee to the spending chost
$3624+$30= $3654 

Now you re-mulitply the chost per stock to the tootle #'s of stock you sold
$21x200= $4200

Then you need to find out what how much you need to pay the stock broker
$4200x.05= $210
 
Then once you find out how much you need to pay him subtract that amount to the total money earned from selling your stocks
$4200-$210= $3990 

Then if you want to also find out your profit just subtract the total amount you payed for the stock and subtract it from the total amount you gained from the stock. 
$3990- $3654= $336 Profit 

6 0
3 years ago
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This list shows the age at which 38 U.S. Presidents died.
user100 [1]
The Answer is: B. 67
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3 years ago
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