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matrenka [14]
3 years ago
8

Select the two values of x that are roots of the given polynomial below. x^2-3x-5

Mathematics
1 answer:
klio [65]3 years ago
7 0
-b +or- root (b^2 -4ac) / 2a
3+or- root 9+20/ 2
3+ or - root 29 /2

5.38516480713 + 3 = 8.385 / 2
x = 4.1925
or x = -1.1925

a=1
b=-3
c=-5
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Mariana and Vicky both solved 617 divided 6. Mariana got 12 remainder 5 as her answer. Vicky got 102 remainder 5 as her answer.
valentina_108 [34]

Answer:

617 ÷ 6

Dividing in order from left to right:

6 into 6 goes once.

6 into 1 doesn't so carry the 1 to the next number

6 into 17 goes twice, remainder 5

So we have: 102 remainder 5.

Vicky is correct.

4 0
2 years ago
Read 2 more answers
In a survey of U.S. adults with a sample size of 2062​,330said Franklin Roosevelt was the best president since World War II. Two
tigry1 [53]

Answer:

a) 0.0255

b) 0.7050

c) 0.2945

Step-by-step explanation:

Probability that one of those sampled saying that Roosevelt was the best president since World War II = 330/2062 = 0.16

Probability that one of those sampled don't mention Roosevelt = (2062 - 330)/2062 = 1732/2062 = 0.84

a) The probability that both adults picked say Franklin Roosevelt was the best president since World War II = (330/2062) × (329/2061) = 0.0255

b) The probability that neither of the two adults say Franklin Roosevelt was the best president since World War II = (1732/2062) × (1731/2061) = 0.7050

c) The probability that at least one of the two adults says Franklin Roosevelt was the best president since World War II = Probability that one of the two adults mention Roosevelt + Probability that the two adults mention Roosevelt

Probability that one of the adults mention Roosevelt = [(330/2062) × (1732/2061)] + [(1732/2062) × (330/2061)] = 0.269

Probability that two of the adults mention Roosevelt has been done in (a) and it is equal to 0.0255

probability that at least one of the two adults says Franklin Roosevelt was the best president since World War II = 0.269 + 0.0255 = 0.2945

3 0
3 years ago
Substitute for y and rewrite the system of equations as a single equation which can be used to solve for x.
Vlada [557]

Answer:

x = 3  and y = 1

Step-by-step explanation:

Given equations

y=3x-8 and y=4-x

We will substitute y from second equation in the first and get:

4-x = 3x-8   first we will add (+x) to both sides and get

4-x+x = 3x+x-8 =>   4 = 4x-8 now we will add (+8) to the both sides and get

4+8 = 4x-8+8 => 12 = 4x  now we will change the sides of equation and get

4x = 12 => x = 12/4 = 3 => x=3  now we will replace x=3 in the second equation

y= 4-x = 4-3=1 => y=1  

Finally we have  (x , y) = ( 3 , 1)

God with you!!!

7 0
3 years ago
When taking a systematic random sample of size n, every group of size n from the population has the same chance of being selecte
frosja888 [35]

Answer: True

Step-by-step explanation:

This is true because the sample are randomly selected. When we say "random" it means selection is being made fairly without taking into consideration any factors such as age, sex, religion, etc. The selection is not bias in that regard as such the population has the same chance of being selected.

4 0
3 years ago
ONLY NEED PART B HELP
bezimeni [28]

Answer: 48 model cars

Step-by-step explanation: 1. You know that the ratio of the number of model cars that Jim owns to the number of model cars Terrence owns is 4:3.

2. Let's call the number of model cars that Jim owns is , therefore, you can solve the exercise as following:

3. Therefore, Jims owns 48 model cars.

4 0
3 years ago
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