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3 years ago

Select the two values of x that are roots of this equation. x2 - – 5x + 5 = 0

Mathematics

1 answer:

umka21 [38]3 years ago

3 0

Answer:

Using the Quadratic Formula

x=-b ± √b²-4ac/[2a]

x= -(-5) ± √5² - 4(1)(5)/(2)

x= 5 ± √25-20 /(2)

x= 5 ± √5 /(2)

x= 5 + √5/(2) and 5 - √5/(2)

Answer

B and C

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Help with questions, I don't care if you google it

frutty [35]

Question 1:

$7.488*10^{-8}$ ÷ $3.12*10^{2}$

= $\frac{7.488*10^{-8}}{3.12*10^{2}} = 2.4* 10^{-8-2} = 2.4* 10^{-10}$

Hence, the answer is A.

Question 2:

Mass = $2.8* 10^{-11}$ grams

New mass = $2.8 * 10^{-8}$ milligrams

Question 3:

$2.085*10^{6} = 2,085,000$

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3 years ago

Jaime claims that when you multiply a whole number by 100 the decimal point moves 2 places to the right salome argues that the d

Marina86 [1]

Answer:

The answer that is correct is salome's answer because when u multiply by 100 you would add 2 zeros

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3 years ago

List a, b, and c for the following Quadratic: x^2 – 3x = 0

grigory [225]

Answer:

23/54

Step-by-step explanation:

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3 years ago

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Marco has a piece of wood that measures 9 x 1/10 + 6 x 1/100 + 4 x 1/1000 how can this measurement be written as a decimal? you

spin [16.1K]

Answer:

The decimal number is 0.964

Step-by-step explanation:

we have

$9(\frac{1}{10})+ 6(\frac{1}{100})+4(\frac{1}{1,000})$

step 1

Multiply each fraction by the whole number

$(\frac{9}{10})+ (\frac{6}{100})+(\frac{4}{1,000})$

step 2

Convert each fraction in a decimal number

Remember

Move the decimal point to the left as many places as there are zeros in the factor.

Move the decimal point one step to the left (10 has one zero).

Move the decimal point two steps to the left (100 has two zeros)

Move the decimal point three steps to the left (1000 has three zeros)

$0.9+0.06+0.004$

step 3

Adds the number

$0.964$

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3 years ago

A rectangular parking lot has a perimeter of 820ft. The area of the Parking lot measures 42000 ft2. What is the width of the par

quester [9]

2W + 2L = 820
LW = 42,000 or L = 42,000/W 
substitute second equation into first equation: 
2W + 2(42,000/W) = 820 
2W + 84,000/W = 820 
2W^2/W + 84,000/W = 820W/W 
2W^2 - 820W + 84,000 = 0 
quadratic formula: 
W = [820 +/- SQR(672,400 - 4(2)(84,000))]/2(2) 
W = [820 +/- 20]/4 
W = 200, 210 
using second equation: 
L = 42,000/200, 42,000/210 = 210, 200 
The dimensions of the parking lot are 200ft by 210ft.

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4 years ago

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