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lianna [129]
3 years ago
15

How to solve a quadratic equation that does not factor?

Mathematics
1 answer:
svlad2 [7]3 years ago
7 0
Use the formula or complete the square.
The zeroes of the quadratic can be real and rational; real and irrational; complex conjugates.
If the quadratic is ax²+bx+c, x=(-b+√b²-4ac)/2a.
If b² > 4ac the solutions are real. If b²-4ac is a perfect square, the solutions are real and rational; otherwise they’re real but irrational.
If b² < 4ac the solutions are complex.
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What is the value of (j+3k)(5)?<br><br> j(x) = (x + 4)^2; k(x) = 8 - x<br><br> (j + 3k)(5) =
jeyben [28]

Step-by-step explanation:

J=(x+4)²

K=(8-x)

X=5

=J+3k

=(x+4)(x+4)+3(8-x)

=(x²+8x+16+24-3x)

=25+25+40

=90

Alternatively:

J=(5+4)²

J=81

K=8-5

K=3

J+3k

81+3(3)

81+9

90

3 0
3 years ago
All of these are service industries except zoo bakery law firm or travel agency
Zina [86]

Answer:

A zoo

Step-by-step explanation:

A zoo can't be consisdered a "service industry" compared to the other ones.

So

A.) Zoo

is your answer

4 0
2 years ago
A box contains several slips of paper. There is one slip for every even number between 13 and 21. Without looking, you draw one
PolarNik [594]
The answer is d you're welcome
5 0
3 years ago
Griffins driveaway is 36 feet long. choose the word and number to complete the sentence correctly.to convert 36 feet to yards wh
never [62]
Divide 36 by 3 to convert from yards to feet. 
the yards to feet ratio is 3:1
5 0
2 years ago
the ratio of red marbles to yellow marbles placed in a bag is 2:7. More marbles are added to the bag: 3 red and 3 yellow marbles
Anvisha [2.4K]

Answer: False.

Step-by-step explanation:

Initially, the ratio is 2:7

This means that if we have 2 red marbles, we must have 7 yellow ones.

The quotient here is 7/2 = 3.5

Now, if you add 3 marbles of each colour, then we have:

2 + 3 = 5 red marbles

7 + 3 = 10 yellow marbles.

Now the ratio is 5:10

This means that for every 5 red marbles, we have 10 yellow ones.

But now we can divide both numbers by the same positive integer, because they have a common factor equal to 5.

5/5 = 1

10/5 = 2

Then we have:

5:10 = 1:2

So the new ratio is 1:2

Then the ratio changed when we added the new marbles, which means that Maria was wrong.

8 0
2 years ago
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