Use the discriminant to determine how many and what kind of solutions the quadratic equation 3x^2 + 4x = - 5 has.
A. one real solution
B. two complex (nonreal) solutions
C. no real or complex solutions
D. two real solutions
Pls help!
Answer:
C.
Step-by-step explanation:
The quadratic equation has two complex (nonreal) solutions option (B) is correct.
What is a quadratic equation?Any equation of the form [tex]\rm ax^2+bx+c=0[/tex] where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.
As we know, the formula for the roots of the quadratic equation is given by:
[tex]\rm x = \dfrac{-b \pm\sqrt{b^2-4ac}}{2a}[/tex]
We have a quadratic equation:
3x² + 4x = - 5
or
3x² + 4x + 5 = 0
D = b² - 4ac
b = 4, a = 3, c = 5
D = (4)² - 4(3)(5)
D = 16 - 60
D= -44
D < 0
Two complexes (nonreal) solutions
Thus, the quadratic equation has two complexes (nonreal) solutions option (B) is correct.
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Which are correct representations of the inequality -3(3x-5)<5(2-x)
Answer: x > 5/-4
Step-by-step explanation:
I got y’all give me he right Awnser and I got brainlest and points !!
Answer:
it's option 3, 1/10. Hope this helps
Joaana saves nickels and quarter in a jar
Answer:
The jar problem
Step-by-step explanation:
Joaana saves nickels and quarter in a jar
She looked to see if she had enough coins to fix her car
She didn't so she went on the side of the street to play her guitar
She played for money by a food bar
She worried she wouldn't make a lot
So she bet illegally on some chickens that fought
She was scared the cops would come and she would get caught
The saw the cops coming and her eyes lit up like a match
She grabbed $500 and she was one they wouldn't catch
It turns out she only needed $10 to fix a tiny scratch
She only had $5 is coins in her jar
Now she has $500 and can fix her car
Hope this helps ya! Keep smiling!
In order to write log^(5) 25=2 in exponential form, it is necessary to convert it to the format bx=y.
What are the values of b, x, and y for the above equation?
Enter your answers in the order of b, x, y, separated by commas, like this: 42, 53, 64
Write a problem in which $180 would be a reasonable answer
Answer:
One person collects $60 in a week what how many money will it have?
Step-by-step explanation:
The Garcia family and the Johnson family each used their sprinklers last summer. The Garcia family's sprinkler was used for 20 hours. The Johnson family's sprinkler was used for 25 hours. There was a combined total output of 1175 L of water. What was the water output rate for each sprinkler if the sum of the two rates was 55 L per hour?
W is the time Woody family used sprinkler.
C is the time Carter family used sprinkler.
Time used total: 50 hours.
W+C = 50 (1)
Total water used is 1900 L.
Woody family used: 40W;
Carter family used 35C.
Equation showing how much water both families used:
40W + 35 C =1900. (2)
We have a system with two equations and two variables. We can use substitution method to solve the system. From equation (1) we express W:
W=50 - C. (1a)
We substitute the variable in equation (2):
40(50 - C) +35C =1900.
We open the parenthesis
2000 -40C +35C =1900,
We combine like terms
2000 -5C =1900,
We subtract 2000 from both sides of the equation
-5C = 1900 - 2000,
We simplify
-5C = -100,
We divide by -5
C = 20.
We substitute the values of C in the equation (1a) and find the value of W:
W = 50 - C,
W = 50 -20 =30.
The Woody family used water for 30 hours and the Carter family used water for 20 hours.
We check our work to be sure we did not make any mistakes:
Total water used:
40 x 30 + 35 x 20 = 1200 + 700 = 1900 L.
After 8 minutes, what is the position of Submarine D, relative to sea level?
Sub A. -4.5 m
Sub B. -6 2/5m
Sub C. -7.5 m
Sub D. -3 3/4 m
Answer:
-30
Step-by-step explanation:
-3 3/4x8=-30 hope this helps
Write an equation of the line that passes through point (2, −4) and has the slope m=12.
HUrry please
gcf and distributive property 24+20
Answer:
4(6 + 5)
Step-by-step explanation:
Given summation:
24 + 20
The greatest common factor:
Factors of:
24 = 1, 2, 3, 4, 6, 8, 12 and 24
20 = 1, 2, 4, 5, 10 and 20
the gcf = 4;
24 + 20 = 4(6 + 5)
This shows the gcf and distributive property
Tthe area of a circle increases at a rate of 5 cm^2/s.
Required:
a. How fast is the radius changing when the radius is 4 cm?
b. How fast is the radius changing when the circumference is 5 cm?
Answer:
(a) 0.198 cm/s (b) 1 cm/s
Step-by-step explanation:
It is given that,
The rate of change of area of a cicle, [tex]\dfrac{dA}{dt}=5\ cm^2/s[/tex]
(a) The area of a circle is given by :
[tex]A=\pi r^2[/tex]
Differentiate both sides,
[tex]\dfrac{dA}{dt}=2\pi r\dfrac{dr}{dt}\\\\\text{Put the value of dA/dt and r = 4 cm}\\\\\dfrac{dr}{dt}=\dfrac{dA/dt}{2\pi r}\\\\\dfrac{dr}{dt}=\dfrac{5}{2\pi \times 4}\\\\\dfrac{dr}{dt}=0.198\ cm/s[/tex]
(b) Circumference, [tex]C=2\pi r[/tex] = 5 cm
[tex]\dfrac{dA}{dt}=2\pi r\dfrac{dr}{dt}\\\\\dfrac{dr}{dt}=\dfrac{dA/dt}{2\pi r}\\\\\dfrac{dr}{dt}=\dfrac{5}{5}\\\\\dfrac{dr}{dt}=1\ cm/s[/tex]
Hence,
(a) 0.198 cm/s (b) 1 cm/s
Pls help i need to get this done or i will get grounded for a week
Answer: the answer is 3
Step-by-step explanation:
Isolate the x so in other words do the opposite, then you have your answer.
Answer:
D
Step-by-step explanation:
BRUH ALL IT SAYS IS "IT HAS ADDITION" HOW CAN YOU NOT SEE THAT I-
Harpo, Groucho, Chico, Zeppo, Gummo and Karl are the finalists in the fabulous Clearers’ Publishinghouse sweepstakes.
Two prizes will be awarded: the Grand Prize and the Even Grander Prize. The prizewinners will be randomly selected (and it is possible that one person may win both prizes).
How many outcomes are possible?
Answer:
ADGTSGADADASDAWDSDWA
Step-by-step explanation:
AADASDWADS
Delta has 493 stamps to her stamp collection she can put 16 stamps on each page of an album how many pages can she fill completely
Answer:
30 full pages but you would have 13 stamps left
Step-by-step explanation:
Answer: 30 pages
Step-by-step explanation:
Ella swims four times a week at her clubs pool. She swims the same number of labs on Monday, Wednesday, and Friday, and 15 laps on Saturday. She swims a total of 51 labs each week. How many laughs does she swim on Monday?
4. Martha loves hot dogs, she eats 120 a day. Her friend dared her to eat sixty more one
day, how many days will it take for her to gobble 600 hot dogs?
Answer:
120*3.5=420+180=600
Which means it took her about 4 and half days.
Step-by-step explanation:
HURRY PLEASE!!!!
the answer choices are
A. 62
B. 48
C. 132
Answer:
Step-by-step explanation:
a
Megan has three candles of the same length to provide light. Candle a
burns for exactly 72 minutes. Candle b burns twice as fast as candle a . Candle c burns
three times as fast as candle b . What is the greatest total number of minutes of light
that all three candles can provide?
What is the value of the expression? 28 – 16 ÷ 8 – 4 3 8 22 24
Answer:
28 – 16 ÷ 8 – 4382224 = -4382198
Step-by-step explanation:
Answer:
B. 8Step-by-step explanation:
Simplifying
28 + 12x = 8x + -4
Reorder the terms:
28 + 12x = -4 + 8x
Solving
28 + 12x = -4 + 8x
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-8x' to each side of the equation.
28 + 12x + -8x = -4 + 8x + -8x
Combine like terms: 12x + -8x = 4x
28 + 4x = -4 + 8x + -8x
Combine like terms: 8x + -8x = 0
28 + 4x = -4 + 0
28 + 4x = -4
Add '-28' to each side of the equation.
28 + -28 + 4x = -4 + -28
Combine like terms: 28 + -28 = 0
0 + 4x = -4 + -28
4x = -4 + -28
Combine like terms: -4 + -28 = -32
4x = -32
Divide each side by '4'.
x = -8
Simplifying
x = -8
Suppose a random sample of n=330 tenneagers 13 to 17 years of age was asked if they use social media. Of those surveyed, 252 stated that they do use social media. Find the sample proportion of tenneagers 13 to 17 years of age who use social media
Answer:
what is
Step-by-step explanation:
The sample proportion of the teenagers 13 to 17 years of age who use social media is 0.236.
What is a Sample Proportion?Sample proportion is defined as the proportion of something from a given sample which has a particular characteristic.
The formula to calculate the sample proportion is,
p = Number of successes in a particular sample / Sample size
Given that,
a random sample of n = 330 teenagers 13 to 17 years of age was asked if they use social media.
Sample size = 330
Of those surveyed, 252 stated that they do use social media.
We have to find the proportion of teenagers 13 to 17 years of age who use social media.
Number of failures = 252
Number of successes = 330 - 252 = 78
Sample proportion = 78 / 330 = 0.236
Hence the sample proportion is 0.236.
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The line to the right goes through the point (6, y). If the angle the graph makes with the x-axis is 22°, what is
the y-coordinate of the point to the nearest hundredth?
Answer:
The y-coordinate of the point is approximately 2.42.
Step-by-step explanation:
From the figure attached below the statement we derive the following equation to calculate the y-coordinate ([tex]y[/tex]), dimensionless, of the point in terms of the x-coordinate ([tex]x[/tex]), dimensionless, and angle of the line ([tex]\theta[/tex]), measured in sexagesimal degrees:
[tex]y = x\cdot \tan \theta[/tex] (1)
If we know that [tex]x = 6[/tex] and [tex]\theta = 22^{\circ}[/tex], then the y-coordinate of the point is:
[tex]y = 6\cdot \tan 22^{\circ}[/tex]
[tex]y\approx 2.42[/tex]
The y-coordinate of the point is approximately 2.42.
Which of the following equations demonstrates the Identity Property of One? A. 3 - 2 = 1 B. 4 • 1 = 14 C. 1 • b = b D. 0 + 1 = 1
Marcos sees a cake advertised as $15 or 2 for $25. What is the difference of the unit rate?
A. 2.50
B. 4.25
C. 10
D. 13
PLEASE HELLP ME FAST
Answer:
A. 2.50
Step-by-step explanation:
25 ÷ 2 = 12.5
15 - 12.5 = 2.50
It costs $3.45 to buy 34 lb of chopped walnuts. How much would it cost to purchase 7.5 lbs of walnuts? GIVING BRAINLIEST *URGENT*
Answer:
$0.75
Step-by-step explanation:
$3.45 ÷ 34 lb. = $0.10 per pound (rounded)
$0.10 x 7.5 = $0.75
It would cost $0.75 to buy 7.5 lbs of chopped walnuts
I'm sorry if wrong! You are loved and you are beautiful/handsome!
-Bee
bro my teacher be making us do questions and when i search them up they arent answered like tfk ughhh
Solve the equation.
x(4x−11)=15
HELP PLZ AND THANK YOU!:)
What is the Measure of 3 ?
CONGRUENT TRIANGLES WORKSHEET. NEED ASAP DUE TODAY
Answer:
Congurent triangles are those which map onto them selves perfectly. This means they share the same angle measurements and side lengths. Therefor we can figure out the side lengths by using the information in both triangles.
AD=5x+11
in the congurent triangle, the corresponding side equals:
CM=7x-3
CM and AD are congurent triangles meaning their sidelengths equal the same. Therefore...
5x+11=7x-3
Now we just solve to find the length of AD and CM (equal lengths)
5x+11=7x-3
11=2x-3
14=2x
7=x
x=7
If x=7 then we can plug it in for AD to find the side length.
5(7)+11=46
Notice that CM equals the same 7(7)-3=46
This is because... they are congruent triangles.
These rules also apply for all angle measurements of congruent triangles:
The m<v is equal to the meaasure of E (corresponding angles in congrurent triangles are equal)
We already astablished what x was (x=7) meaning if we find the measure of E then we have the measure of V sicne they are corresponding angles in a congrurent triangle.
(6x7+1)=43°
therefore the m<v is equal to 43°
46 and 43° is your answer
Step-by-step explanation:
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How do you solve this A-4=
