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Cloud [144]
3 years ago
7

The first painter can finish a paint job in 2 hours. The second painter can finish the same job in 8 hours. How long would it ta

ke them to finish the job if they were working together?
Mathematics
1 answer:
Llana [10]3 years ago
8 0
I believe it takes 1 3/5 hrs for them to finish the job together
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Use circle C<br><br> classify arc MNO in circle C
inna [77]

Answer:

Semicircle

Step-by-step explanation:

As we can see, the arc is bounded by the chord MO

since the chord passes through the center of the circle, we have it that the chord is a diameter

Mathematically, an arc bounded by a diameter represents half of a circle

So we can conclude that the arc MNO in circle C is a semicircle

5 0
3 years ago
Carlos is using a number line to add another integer to –4. He begins by showing –4 on the number line, as shown below. Carlos a
Strike441 [17]

Answer:

The number must be a negative integer because -4+ any negative is a negative

Step-by-step explanation:

3 0
3 years ago
Circle O, with center (x, y), passes through the points A(0, 0), B(–3, 0), and C(1, 2). Find the coordinates of the center of th
balandron [24]
The answer:

the main formula of the circle's equation is 
(x-a)²+ (y-b)² = R²
where C(a, b) is the center of the circle
R is the radius

if a point A(x', y') passes through the circle, so the equation of the circle can be written as 
(x'-a)²+ (y'-b)² = R², and that is  a main formula.


<span>Circle O, with center (x, y), passes through the points A(0, 0), B(–3, 0), and C(1, 2), so we have exactly three equation:
</span>
(0-x)² + (0-y)² = R², circle O passes through A
x²+y²= R²
(-3 -x)² + (0-y)² = R², circle O passes through B
(-3 -x)² + (y)² = R²
(1-x)² + (2-y)² = R², circle O passes through A
(1-x)² + (2-y)² = R²

and we know that R= OA = OC= OB, 
OA=R= sqrt( (0-x)² + (0-y)² ) = OB = sqrt((-3 -x)² + (0-y)²), this implies

x²+y² = (-3 -x)² + (0-y)² , it implies x² = 9+ x² + 6x , and then -9/6=x, x= -3/2
and when OA = OC
x²+y² =(1-x)² + (2-y)²  so, x²+y² =1+x²-2x +4+y²-4y, therefore -5= -2x -4y
 -5= -2x -4y, when x = -3 /2   we obtain y = 2

the center is C(-3/2, 2)
7 0
3 years ago
I promise Brainliest to the first to answerBased on the graph below, what is ƒ(3)? Each tick represents 1 unit.
Zigmanuir [339]

Answer:

So first we need to find 3 on the x position. Any time you have a number passed into a function it means we need to get the x coordinate. Then we trace the point on the line which has 3 as a coordinate for x. Then the output will give us the y coordinate. So we can see that for 3 the y on the line is 3 also. Therefore the answer is

<h2><u>3</u></h2>

4 0
3 years ago
Which is a line segment
olya-2409 [2.1K]
A line segment is a line with two end points. Hope this helped! Good luck! :)
8 0
3 years ago
Read 2 more answers
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