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ryzh [129]
3 years ago
8

Can you evaluate an expression?

Mathematics
2 answers:
ozzi3 years ago
8 0
Yes you can just write down how you feelabout something that'll help alot
Tresset [83]3 years ago
8 0
Yes you can evaluate an expression by<span> that you have to substitute a number for each variable and perform the arithmetic operations.</span>
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ANSWER FOR BRAINLIEST!!!
Maru [420]

If you know that -2 is a zero of f(x) = x^3 + 7x^2 + 4x - 12, explain how to solve the equation.

First you have to figure out what could make f(x) = 0 to get rid of the cube. I'm going to test the array of data, x = -2, x = -3, and x = -4 because this type of equation probably has more negative values given that if you plug in some values the cubed-values and squared-values will surpass the "-12". Plug this into a calculator.
x^3 + 7x^2 + 4x - 12
f(-2) = -8 + 28 - 8 - 12 = 0

So you know that when x = -2, f(x) = 0. Divide "(x + 2)" from the equation and you will get... x^2 + 5x - 6. Now this is a simple polynomial one that you can figure to be (x + 6) (x - 1) just by looking at it because -6 multiplied by 1 is negative 6 and you see 5 and know that 6 - 1 = 5.

The solution is (x + 6) (x - 1) (x + 2) meaning that when x = -6, 1, or -2, f(x) is 0.

4 0
3 years ago
An electrician must use 15 miles of electrical cable between electric poles. How many yards of cable will be used?
Dmitry [639]

Answer:

The 3rd option or 39,600 would be the correct answer.

Step-by-step explanation:

Hope this helps:)

7 0
2 years ago
Find the slope of the line connecting the point (4,8) to the point (8,12)
Katen [24]

Answer: 8/8

Step-by-step explanation:

6 0
3 years ago
Find the common difference of the arithmic sequence 19 13 17 21
eimsori [14]

Answer:

sorry,this is not a question, has different answers

4 0
3 years ago
Por favor alguien me puede ayudar con esto
Gnoma [55]
No entiendo....................
7 0
3 years ago
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