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Iteru [2.4K]
3 years ago
12

Use the function f(x) to answer the questions:

Mathematics
1 answer:
True [87]3 years ago
7 0

Answer:

x=(-2,0) and x=(5/2,0)

Step-by-step explanation:

To find x-intercepts you set f(x), or y, to 0 and then solve.

0=2x^2-x-10\\Factor!\\0=(x+2)(2x-5)\\x+2=0\\x=2\\2x-5=0\\2x=5\\x=\frac{5}{2}

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A bag contains 56 marbles: 7 red, green, 11 yellow, 17 brown, and 13 blue.
pav-90 [236]

Answer:

8/56

Step-by-step explanation:

Add up all other marble colors then find the difference from the total.

3 0
3 years ago
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What is the equation of the blue graph?
vovikov84 [41]

Answer:

b

Step-by-step explanation:

I just did it in my math class and got it right

7 0
3 years ago
Which function has zeros at x=-2 and x=5?
Licemer1 [7]

Answer:

x^{2} - 3x - 10

Step-by-step explanation:

To start, lets form our polynomial factors from our zeroes.

x = -2

x + 2 = 0

x = 5

x - 5 = 0

Now lets put these into factored form by moving them into parenthesis and multiplying them with each other!

(x+2)(x-5)

We can start moving them out! I am going to use FOIL, but you could also use distributive or any other method/property.

x · x = x²

x · -5 = -5x

x · 2 = 2x

2 · 5 = 10

Now lets put our terms into our polynomial function, based on the order of the powers.

x^{2} - 3x - 10

We are done! Hope this helps!

7 0
3 years ago
Sarah rolls 2 fair dice and adds the results from each.
Tom [10]

Answer:

0/6

Step-by-step explanation:

because there are the numbers from 1-6 and no matter what you add you cant get it lower than 2 (1+1)

7 0
3 years ago
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If a and b are two angles in standard position in Quadrant I, find cos(a+b) for the given function values. sin a=4/5 and cos b=5
vladimir1956 [14]
First let's find the angles a and b.

 We have then:
 sin a = 4/5
 a = Asin (4/5)
 a = 53.13 degrees.

 cos b = 5/13
 b = Acos5 / 13
 b = 67.38 degrees.

 We now calculate cos (a + b). To do this, we replace the previously found values:
 cos ((53.13) + (67.38)) = - 0.507688738
 Answer: 
 -0.507688738
 Note: there is another way to solve the problem using trigonometric identities.
4 0
4 years ago
Read 2 more answers
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