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Ber [7]
3 years ago
14

Find all of the zeros of f(x) = 5x2 + 40x - 100.

Mathematics
2 answers:
Mama L [17]3 years ago
7 0

Answer:

x_1 = 2

x_2 = -10

Step-by-step explanation:

To find all of the zeros of f(x) = 5x^2 + 40x - 100 we can use the quadratic formula:

x = \frac{-40 \pm \sqrt{40^2 - 4(5)(-100)}}{2(5)}

x = \frac{-40 \pm 60}{10}

x_1 = \frac{-40 + 60}{10}

x_1 = 2

x_2 = \frac{-40 - 60}{10}

x_2 = -10

rjkz [21]3 years ago
3 0
I used the quadratic equation to solve so your answer is X= -10, 2

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During a scuba dive, Lainey descended to a point 23 feet below the ocean surface. She continued her
abruzzese [7]

t (23) ≤ 97 - 23

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≤ is used instead of < because it states more than, not "equal or more than" (meaning 97 sharp is fine)

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3 years ago
Avaluate 2^3x-1 for x=1
DENIUS [597]

<em><u>Answer:</u></em>

4 or 7 (Check the explanation to see which one your equation <em>actually</em> is.

<em><u>Step-by-step explanation:</u></em>

One thing I want to clarify for you, It's Evaluate, not Avaluate.

Okay so, we want to find the value of 2^3x-1 and we know x = 1.

You didn't really clarify if the expression was 2^{3x-1} or 2^{3x}-1, so I'll be doing both:

For 2^{3x-1}, we should plug in x to get 2^{3(1)-1} and then simplify to get 2^{2}.

2 to the power of 2 or 2^{2} is equal to 2 * 2 or 4.

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7 0
3 years ago
Read 2 more answers
How many students were questioned about the approximate number of text messages they send each day? Explain or
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Can someone please help on number 20? WILL MARK YOU AS BRAINIEST. (can you also show how you do the problem?) :(
PSYCHO15rus [73]

Answer:

x =(22-√196)/6=(11-7)/3= 1.333

Step-by-step explanation:

(3x2 -  22x) +  24  = 0

The first term is,  3x2  its coefficient is  3 .

The middle term is,  -22x  its coefficient is  -22 .

The last term, "the constant", is  +24

Step-1 : Multiply the coefficient of the first term by the constant   3 • 24 = 72

Step-2 : Find two factors of  72  whose sum equals the coefficient of the middle term, which is   -22 .

     -72    +    -1    =    -73

     -36    +    -2    =    -38

     -24    +    -3    =    -27

     -18    +    -4    =    -22    That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -18  and  -4

                    3x2 - 18x - 4x - 24

Step-4 : Add up the first 2 terms, pulling out like factors :

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             Add up the last 2 terms, pulling out common factors :

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Equation at the end of step 2:

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Theory - Roots of a product

3.1    A product of several terms equals zero.

When a product of two or more terms equals zero, then at least one of the terms must be zero.

We shall now solve each term = 0 separately

In other words, we are going to solve as many equations as there are terms in the product

Any solution of term = 0 solves product = 0 as well.

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Answer:

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Step-by-step explanation:

it's easy

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