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dusya [7]
3 years ago
12

4

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
7 0

Answer:

b

Step-by-step explanation:

because

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Determine the discriminant for the given equation x^2+4x+5=0. Then describe the roots(how many and what type).
Fed [463]

Discriminant = b^2 - 4ac, where a, b and c come from the form of the quadratic equation as ax^2 + bx + c

Discriminant = (4)^2 - 4(1)(5)
= 16 - 20
= -4

-4 < 0, therefor there are no roots

(If the discriminant = 0, then there is one root
If the discriminant > 0, there are two roots, and if it is a perfect square (eg. 4, 9, 16, etc.) then there are two rational roots
If the discriminant < 0, there are no roots)
3 0
3 years ago
In an election, about 500,000 people voted in all. What could be the exact number of people who voted in the election?
elixir [45]
I am going to give a few answers:

497,543
504,690
501,991
496,900
6 0
2 years ago
A pair of boots has an original price of $95. they are on sale for 35 percent off. what number can you multiply $95 by to equal
Alex Ar [27]
Multiply it by .35
.35 is equal to %35.
4 0
3 years ago
The sale price is $6.85 less than the regular price. The sale price is
Dima020 [189]

Answer:

$49.35

Step-by-step explanation:

3 0
3 years ago
Ann has 30% less money than Mary, and Jessica has 70% more than Mary. If the 3 of them have a (added up) total of $102, how much
Roman55 [17]
Let x be the amount of Ann money, y be Jessica's money and z Mary money. 
30% of z equates 0.3*z. 
Ann has 30% less than z so: x = z - 0.3z = 0.7z.
70% of z equates 0.7z. 
"Jessica has 70% more than Mary " we deduce the equation: y =z+0.7z= 1.7z.
Signe the total is $102, we deduce the equation x+y+z = 102. 
x=0.7z and y=1.7z then 0.7z+1.7z+z=102, therefore 3.4z=102 then 
z =102/3.4 = $30.
x=0.7*30= 21 and y=1.7*30=51.

Ann has $21, Mary has $30 and Jessica has $51.
  
3 0
3 years ago
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