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Leviafan [203]
3 years ago
6

Find the zeroes of the polynomial using the quadratic formula.

Mathematics
1 answer:
babymother [125]3 years ago
6 0

Answer:

Step-by-step explanation:

2x² - 3x - 15 = 5

2x² - 3x - 20  = 0

Quadratic formula

x = [3 ± √(3² – 4·2(-20))] / [2·2]

 = [3 ± √169] / 4

 = [3 ± 13] /4

 = -2.5, 4

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Is each number rational or<br> irrational ?<br> Select Rational or Irrational for<br> each numbers
IRINA_888 [86]

Answer:

0.5 is rational

\sqrt{24}

is irrational

3.42859873 is irrational

\frac{0}{100}

is rational

Explanation:

0.5 can be a fraction. (1/2)

Square root of 24 cant be a fraction.

3.42859873 cant be a fraction.

0/100 is a fraction.

7 0
3 years ago
What is wrong with this dot plot?
krok68 [10]
The range is 10 to 40 and then the rest .
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6 0
3 years ago
Read 2 more answers
Which pairs of rational numbers are equivalent? Select all that apply.
Airida [17]

Answer:

-0.5 and negative one-half

-1/50 and -0.02

Step-by-step explanation:

-0.5 can be rewritten as -5/10. This can be simplified to -1/2 which is the same as negative one-half.

7/10 isn't equivalent to 11/20. If you multiply 7/10 by 2/2 to get the denominator of 20, it will become 14/20 not 11/20.

-1/50 in decimal form is -0.02 so -1/50 and -0.02  are equivalent.

0.15 and 1/5 aren't equivalent because 1/5 in decimal form is is 0.2, not 0.15.

4 0
3 years ago
Read 2 more answers
A function is different from a procedure because
Elena L [17]

Answer:

c. return a value

Step-by-step explanation:

Generally speaking, functions <em>return a value</em>, whereas procedures don't (so a procedure is just a function that doesn't return a value). ... By <em>returns a value, </em>we mean that the function creates some sort of results, which is passed back to the calling function.

7 0
3 years ago
The numbers 1 through 9 are written in separate slips of paper, and the slips are placed into a box. Then, 4 of these slips are
Vadim26 [7]
Let's think of the problem as follows.

Write all the 4-digit numbers that can be formed using the digits from 1 to 9, without repetition, in pieces of paper, and put them in a bag. What is the probability of picking the 4-digit number 1234, among these numbers.

The connection of the 2 problems is as follows:

The 4-digit number, for example 5489, represents drawing first 5, then 4, then 8, then 9 , in the original question.

we did not allow repetition, because for example the number 8918 would represent drawing 8, then 9, then 1 then 8 (again!!), which is not possible, so we lose the connection between the problems.


So there are in total 9*8*7*6= 3024  4-digit numbers, with non-repeating digits.

One of these numbers is 1234 (representing drawing 1, then 2, then 3, then 4)

among these 3024 numbers, the probability of picking 1234 is 
\frac{1}{3024}= 0.00033


We could have solved this problem also as :

P(drawing 1, 2, 3, 4 in order)= \frac{1}{9} * \frac{1}{8} * \frac{1}{7} * \frac{1}{6} = \frac{1}{3024}

Answer:\frac{1}{3024}= 0.00033
7 0
3 years ago
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