MATHEMATICS MIDDLE SCHOOL

If the roots of a quadratic equation are real,irrational,and unequal,the discriminant could have a value of1)1
2)0
3)8
4)-6
Help me out guys.

Answers

Answer 1
Answer:

Answer:

8

Step-by-step explanation:

The condition for the discriminant b² - 4ac is

If b² - 4ac > 0 then roots are real, irrational and unequal

If b² - 4ac > 0 and a perfect square, roots are real, rational and unequal.

Thus

b² - 4ac = 8
Answer 2
Answer:

Answer:

3) 8

Step-by-step explanation:

Real and unequal:

B² - 4AC > 0

Irrational: B²-4AC not a perfect square

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What is the next term in the sequence below?648, 108, 18, 3, . . .

A. 0.5
B. 1.5
C. 1.75
D. 2.5

Answers

The next term or the fifth term of the geometric sequence is 0.5. The option A is the correct option.

What is geometric sequence?

Geometric sequence is the sequence in which the next term is obtained by multiplying the previous term with the same number for the whole series.

It can be given as,

a_n=ar^(n-1)

Here, (a) is the first term of the sequence and (r) is the common ratio.

The sequence given in the problem is,

648,  108,  18,  3,  . . .  and so on.

The common ratio between the two terns is,

r=(648)/(108)=6\nr=(108)/(18)=6\nr=(18)/(3)=6\n\

Thus, the common ratio of the geometric series is 6.

The first term is 648 and the common ratio is 6. Thus the next or fifth term of the sequence is,

a_5=(648)((1)/(6))^(5-1)\na_5=(648)((1)/(6))^(4)\na_5=0.5

Hence, the next term or the fifth term of the geometric sequence is 0.5. The option A is the correct option.

Learn more about the geometric sequence here;

brainly.com/question/1509142

Answer:

To get from one term of this sequence to the next, divide by 6.

So, once we get to three, the next term will be 0.5 because 3/6 = 0.5

Let me know if this helps!

The average adult human has approximately 2.5 X 10' red blood cells and 7 X 10' whiteblood cells. About how many times as great is the number of rea blood cells than the
number of white blood cells? Write and solve an equation.

Answers

Answer:

\large \boxed{r =\frac{\text{RBC}}{\text{WBC}};\,\text{400 times}}

Step-by-step explanation:

I think your missing numbers are

RBC = 2.5 × 10¹³ and  

WBC = 7    × 10¹⁰

This is a ratio question.

You are asked to find the ratio of RBCs to WBCs.

Let r = the ratio.

Then the equation for the ratio is

\mathbf{r} =\mathbf{ \frac{\text{RBC}}{\text{WBC}}}

Insert the values and do the division.

\begin{array}{rcl}r& =& \frac{\text{RBC}}{\text{WBC}}\n\n& =&(2.5 * 10^(13))/(7 * 10^(10))\n\n& =&\mathbf{400}\n\end{array}\n\text{The number of RBCs is $\large \boxed{\textbf{400 times}}$ as great as that of the WBCs.}

The opposite of the original statement. These statements are also called the inverse of a conditional statement.

Answers

Answer:

Negation is the correct answer to the given question

Step-by-step explanation:

The main objective of Negation is to evaluated the inverse of a specified computational statement or the conditional statement. If the conditional statement is true then the negating statement is false or if the  conditional statement is false then the negating statement is True .The negation is represented by the symbol ~ .

For example :

F:      Number is 5.

~F:    Number is not 5.

Conditional statement         Negation(~)

True                                          False

False                                         True

All the other option are not determine the inverse of the conditional statement so these are incorrect option .

2x + y = −3
3x + 2y = −8

Answers

Answer:

x=2/3 y=-3

Step-by-step explanation:

2x+y=-3 *2   6x+2y=-6

3x+2y=-8

6x+2y-3x-2y=-6+8

3x=2

x=2/3

3*2/3+2y=-8

2+2y=-4

1+y=-2

y=-3

Simplify -6 (x - 3) - 4 (y +5) + ( -5) (7 -2b)

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