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Anastasy [175]
3 years ago
5

During summer vacation, you charge people 8$ per hour for swimming lessons and 20$ registration fee. If you make 52$ one day, ho

w many hours did you spend teaching lessons?
Mathematics
2 answers:
tatyana61 [14]3 years ago
8 0

Answer:

You taught for 4 hours

Step-by-step explanation:

52-20=32 how many hours you spent teaching

then divide that by eight which is 4 so youve been teaching for 4 hours

zepelin [54]3 years ago
3 0

Answer:

You taught for 4 hours

Step-by-step explanation:

Let this number of hours be x.  Then:

Total earned = $20 + ($8/hr)x

Equate this to $52 and then solve the resulting equation for x:

20 + 8x = 52

Then 8x = 32, and x = 4.  You taught for 4 hours.

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Factor the polynomial 25x^2−20xy+180y^2
sp2606 [1]

Answer:

25 x 2 − 20 x y + 180 y 2

 



Step-by-step explanation:

Factor 5 5 out of 25 x 2 25x2.

5 ( 5 x 2 ) − 20 x y + 180 y 2 5(5x2)-20xy+180y2

Factor 5 5 out of − 20 x y -20xy.

5 ( 5 x 2 ) + 5 ( − 4 x y ) + 180 y 2 5(5x2)+5(-4xy)+180y2

Factor 5 5 out of 180 y 2 180y2. 5 ( 5 x 2 ) + 5 ( − 4 x y ) + 5 ( 36 y 2 ) 5(5x2)+5(-4xy)+5(36y2)

Factor 5 5 out of 5 ( 5 x 2 ) + 5 ( − 4 x y ) 5(5x2)+5(-4xy). 5 ( 5 x 2 − 4 x y ) + 5 ( 36 y 2 ) 5(5x2-4xy)+5(36y2)

Factor 5 5 out of 5 ( 5 x 2 − 4 x y ) + 5 ( 36 y 2 ) 5(5x2-4xy)+5(36y2). 5 ( 5 x 2 − 4 x y + 36 y 2 )

4 0
3 years ago
Use the given conditions to write an equation for the line in point slope form and general form.
S_A_V [24]

Step-by-step explanation:

point-slope form is

y - y1 = a(x - x1)

with a being the slope, and (x1,y1) being a point on the line.

the general form is

y = ax + b

a is again the slope. and b is the y-intercept (the y value when x = 0).

the slope is the ratio "y coordinate change / x coordinate change".

so, we need to find the slope of the original line :

x - 7y - 9 = 0

x - 9 = 7y

y = 1/7 x - 9/7

so, the original slope is 1/7.

the perpendicular slope turns the original slope upside-down and flips the sign.

so, it is

-7/1 = -7

the point slope form is

y - -4 = -7(x - 6)

y + 4 = -7(x - 6)

for the standard form we only need to do the multiplications and transform the equation into the above form :

y + 4 = -7(x - 6)

y + 4 = -7x + 42

y = -7x + 38

6 0
2 years ago
How do you do this properties and mental math to solve 275+180+120 =
kramer
Make 275 t0 200 and 180 to 100 and 120 to 100

200+100+100=300

now turn 75 to 70 and 80 will stay 80 and 20 will stay 20

70+80+20=170

now add the 5 to 170= 175

now add 300 to 175 to get 475 which is ya answer
6 0
3 years ago
Help me!!!
adoni [48]
The answer is B: -2x -3

5 0
3 years ago
You own a rectangular home lot that is 46,200 square feet in size. You get a quote of $10 per foot. If your lot is 220ft long an
olya-2409 [2.1K]

Answer:

Step-by-step explanation:

width=46200÷220=210 ft

what you mean by quote? i don't know.

3 0
3 years ago
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