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just olya [345]
3 years ago
8

Benita spent 25% of her money on new shoes. The

Mathematics
1 answer:
dsp733 years ago
8 0
25% is 1/4 of 100% so to get the answer you multiply 20 by 4. 20x4=80. Benita had $80 before buying the shoes
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Consider the quadratic equation ax^2+bx+5=0,where a, b and c are rational numbers and the quadratic has two distinct zeros.
FrozenT [24]
You have shared the situation (problem), except for the directions:  What are you supposed to do here?  I can only make a educated guesses.  See below:

Note that if    <span>ax^2+bx+5=0    then it appears that c = 5 (a rational number).

Note that for simplicity's sake, we need to assume that the "two distinct zeros" are real numbers, not imaginary or complex numbers.  If this is the case, then the discriminant,    b^2 - 4(a)(c), must be positive.  Since c = 5, 

b^2 - 4(a)(5) > 0, or b^2 - 20a > 0.

Note that if the quadratic has two distinct zeros, which we'll call "d" and "e," then 

(x-d) and (x-e) are factors of ax^2 + bx + 5 = 0, and that because of this fact,

         - b plus sqrt( b^2 - 20a )
d =  ------------------------------------
                      2a

and

 </span>         - b minus sqrt( b^2 - 20a )
e =  ------------------------------------
                      2a

Some (or perhaps all) of these facts may help us find the values of "a" and "b."  Before going into that, however, I'm asking you to share the rest of the problem statement.  What, specificallyi, were you asked to do here?

7 0
3 years ago
What is the LCM of two numbers that have no common factors greater than 1
34kurt
The answer to that is (the product)
3 0
3 years ago
In ten years, the population of Detroit fell from 950,000 to about 712,500. Find the percent change.
sergij07 [2.7K]

Answer:

25% decrease

Step-by-step explanation:

Percent change can be found by doing difference/original

(950,000 - 712,500) / 950,000

= 0.25

There was a 25% decrease in the population

5 0
3 years ago
Y-5=m(x-2) solve for x
Scilla [17]
4  the answer


hope it helped


8 0
3 years ago
Mrs. Smith and her two sons spent a total of $53.50 at the movie theater. Together they spent $26.75 on snacks and Mrs. Smith's
MrRissso [65]

Answer:

$7.75

Step-by-step explanation:

$26.75 + $11.25=$38

$53.50 - $38=$15.5

$15.5/2= $7.75

5 0
2 years ago
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