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Marrrta [24]
3 years ago
8

Consider the procedure used below to solve the given equation.

Mathematics
1 answer:
muminat3 years ago
5 0
The first mistake was made in step 1 because they took out the x’s it should be 10x-25+2x+8=43
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Bryan wants to convert a speed of 85 kilometers per hour into the speed in meters per second what is the correct conversion
lara31 [8.8K]

Answer:

23.6111

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Step-by-step explanation:

5 0
3 years ago
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A culture starts with 4000 bacteria after 5 hours it has 4800 how many bacteria after 15 hours
iogann1982 [59]

Answer:

6400

Step-by-step explanation:

so every 5 hours it gains 800 bacteria so 4800+800=5600 (hour 10)

and 5600+800=6400 (hour 15)

8 0
2 years ago
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What are the zeros of the function f(x)=x^2-2x-15?
valkas [14]
To find the zeros of this function, we must first set the entire function equal to 0

f(x) = x² - 2x - 15 = 0

Since this is a quadratic function, we must use the quadratic formula, which is:

\frac{-b +/-  \sqrt{b^{2} - 4(a)(c) } }{2a}

Let's assign a, b, and c using our first function
x² means a = 1 (because it could be written as 1x²)
-2x means b = -2
-15 means c = -15

Now let's plug those in:

\frac{-(-2) +/- \sqrt{(-2)^{2} - 4(1)(-15) } }{2(1)}

which simplifies to:

\frac{2 +/- \sqrt{(4 + 60} }{2}

Simplified further:

\frac{2 +/- \sqrt{(64} }{2}
\frac{2 +/- 8 }{2}
And divide it by the 2 on the bottom gives us:

2 +/- 4

2+4 = 6
2-4 = -2

So the zeros of this function are -2 and 6
6 0
3 years ago
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You roll a​ die, winning nothing if the number of spots is odd​, ​$5 for a 2 or a 4​, and ​$20 for a 6. ​a) Find the expected va
Dovator [93]

TeX rendering has been iffy at best on this site for the past few days, at least in my experience. I've attached a solution below.

8 0
2 years ago
A mirror frame in the shape of an oval is shown below. The ends of the frame form semicircles: An oval is formed by a rectangle
sesenic [268]
We can solve this by first finding the diameter of the two semicircles. We know that the width of the rectangle is 27 inches, which also happens to be the diameter of the circle.

The circumference of a circle is 2πr or πd. The problem says that it is a semicircle, however, it says that there are two of them. Since the two semicircles are the same size, we know that they can combine to form one circle, so we can just find the circumference of one circle to account for both of the semicircles:

C=27π inches

We also know that the length of the rectangle is 60 inches. We only want to find the perimeter of the frame, so we don't have to account for the widths of the rectangle because it is inside the frame. Therefore, the two sides of the rectangle together are 120 inches. Now we can add this to the circumference we found:

120+27π inches or 204.78 inches (depends on what your teacher is asking for)
5 0
3 years ago
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