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sashaice [31]
3 years ago
10

Johnny will work 15 hours a week during the 36 week school year, and 40 hours a

Mathematics
1 answer:
Naddika [18.5K]3 years ago
7 0

Answer:

He will save 590 dollars by the end of the year

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Find the center and radius of the circle whose diameter has an endpoint at (-3, -4) and the origin.
Zina [86]

Given end points of diameter,

(x1,y1)=(-3,-4)

(x2,y2)=(0,0)

Now,

the equation of circle is,

(x-x1)(x-x2)+(y-y1)(y-y2)=0

or, (x+3)(x-0)+(y+4)(y-0)=0

or, x^2 +3x +y^2 +4y =0

or, x^2 +y^2 +3x + 4y=0

which is in the form of x^2 +y^2 +2gx +2fy + c=0

where,

g=3/2

h=2

c=0

Now,

radius(r) =  \sqrt{ {g}^{2}  +  {f}^{2} - c  } \\  =  \sqrt{ \frac{ {3}^{2} }{ {2}^{2} } +  {2}^{2}  - 0 }  \\  =  \sqrt{ \frac{9}{4}  + 4}  \\  =   \sqrt{ \frac{25}{4} }  \\  =  \frac{5}{2}

6 0
3 years ago
A cylinder has a radius of 5 feet and a height of 8 feet. Which of the following can be used to calculate the volume of a cone t
Cloud [144]
The formula is pi*r^2*h/3
your answer would have to be B
7 0
3 years ago
Helppppppppppppppppppppppppppppppppp
Brrunno [24]

f(x)=x²-1  
g(x)=2x-3
f(x)*g(x)=(x²-1)*(2x-3)-----------> <span>this function exists for all real numbers</span>

the answer is the interval (-∞,∞)

using a graph tool see the attached figure

6 0
4 years ago
3(4x + 2)<br> Pleaseee helppppp meeeeeee
zlopas [31]

Answer:

12x + 6

Step-by-step explanation:

3(4x + 2)

you distribute the 3 to 4x and 2

12x + 6

hope this helps

5 0
3 years ago
Question 20 read the question and type your response in the box below the question. your response will be saved automatically. w
grandymaker [24]
You're looking for something like y=2x+3 and 2y=4x+6?
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3 years ago
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