What is the discriminant of the quadratic equation
x^2– 7x-9=0
Answers
Related Questions
In a survey, 27% of the people chose salads over a meat dish. In all, 81 people chose salads. How many people were in the survey?
Answers
Answer:
300
Step-by-step explanation:
Let x be the number of people in the survey
81/x = 27%
81/x = 0.27
x = 81/0.27
x = 300
The Pine Apple Store found that 18% of their weekly customers would purchase a new R-phone before leaving the store. If this was equivalent to 63 customers, how many total people entered the store last week?
Answers
Answer:
350 customers
Step-by-step explanation:
Since this is a ratio question and we only have variable that we need to solve (total people that entered last week), Then we can use the Rule of Three to solve this problem. We do this by multiplying the diagonal values of the following model and dividing by the third value in order to find the variable, like so...
18% of customers <====> 63 customers
100% of customers <====> x customers
(100 * 63) / 18 = x
6,300 / 18 = x
350 = x
Finally, we can see that a total of 350 customers entered the store last week.
Nichole gets paid $13 and hour washing cars.
A) create an equation that models nicholes pay where x is the number of hours and y is the pay.
B) What is the slope? what is the intercept of the equation?
Answers
Answer:
A) y = 13x
B) Slope is 13, intercept is 0
Step-by-step explanation:
Answer:
y = 13x
The slope is 13
The y intercept is 0
Step-by-step explanation:
Since he gets $13 per hour, his pay can be represented by 13x, as x is the number of hours.
To create the equation, set this equal to y, as it represents his total pay.
So, the equation is y = 13x.
Using the equation y = mx + b, we can find the slope (m) and the y intercept (b)
Since this equation has 13 as the coefficient, the slope is 13. There is also no b value since nothing is being added to 13x, so the y intercept is 0.
The length of each side of a square is 6 feet more than the length of a side of a regular Octagon. The perimeter of the square is equal to the octagon. Find the length of the square and the length of a side of the octagon.
Please show work, I will give brainliest.
Answers
9514 1404 393
Answer:
square: 12 ft sidesoctagon: 6 ft sidesStep-by-step explanation:
This problem can be worked in your head.
If the perimeters of the square and regular octagon are the same, the side length of the 4-sided square must be the same as the length of 2 sides of the 8-sided octagon. Since the side of the square is 6 ft more than the side of the octagon, each side of the octagon must be 6 ft, and each side of the square must be 12 ft.
__
We can let s represent the side length of the octagon. Then we have ...
8s = perimeter of octagon
4(s +6) = perimeter of square
These are equal, so ...
4(s +6) = 8s
s +6 = 2s . . . . . . divide by 4
6 = s . . . . . . . . . . subtract s
The octagon has 6-ft sides; the square has 12-ft sides.
The measure of the vertex angle of an isosceles triangle is 20 less than twice the measure of each base angle. Find the measure of the vertex angle
Answers
Answer:
80
Step-by-step explanation:
Remark
Every triangle has a measure of 180 degrees.
Equation
Let the base angle = x
x + x + 2x-20 = 180
Solution
4x - 20 = 180
4x = 180 + 20
4x = 200
x = 50
Conclusion
Base angle 1 = 50
Base angle 2 = 50
Vertex angle = 2*50 - 20
Vertex angle = 100 - 20
Vertex angle = 80
What is the check digit(d) for the UPC bar code
7-25272-73070-d
A)8
B)3
C)4
D)2
Answers
Which expression is equivalent to -9a-10-6a+7−9a−10−6a+7
Answers
Answer:
−30a−6
Step-by-step explanation:
Let's simplify step-by-step.
−9a−10−6a+7−9a−10−6a+7
=−9a+−10+−6a+7+−9a+−10+−6a+7
Combine Like Terms:
=−9a+−10+−6a+7+−9a+−10+−6a+7
=(−9a+−6a+−9a+−6a)+(−10+7+−10+7)
=−30a+−6
BRAINLIEST. if you don't mind.
AB=12 cm,AD=5cm area of rectangle ABCD given that
Answers
The area of a rectangle is given by the formula length *width
12*5 is 60
So, the area is 60 cm^2
Qui peut me donner les reponse svp
Answers
Answer:
i dont understand spanish im so sorry
Step-by-step explanation:
Can someone draw like how to divide 12/5
Answers
Answer:
12 divide by 5 is easy lemme show you
Step-by-step explanation:
The stuff on the left
can someone find the equation plz and solve it.
i will give brainliest i need u guys to save my math grade lol :(
Answers
Answer:
$2 per Chicken and $9 per Duck
Step-by-step explanation:
the equations for the problem are as follows (x = the value of chickens and y = the value of ducks):
5x + 3y = 55
4x + 3y = 53
if you subtract the equations you would get x = 2, which means the chickens are worth $2 each
If we re-input the x that we now know as 2 and solve one of the equations for y, we will get y = 9
Answer:
If you need the cost of each duck and chicken it would be around 6 dollars per duck or chicken.
I'm not completely sure tho sorry.
What are the answers to these two ? HELP PLEASE
Answers
Answer:
1. D 2. A
Step-by-step explanation:
Can I have Brainllest answer Please I need It.
y = 2/3x - 3 as a function
Answers
Answer:
∫(x) = [tex]\frac{2}{3}[/tex]x - 3
Answer:
f(x)=2/3x-3
Step-by-step explanation:
f(x) is the same as y, so the function would be f(x)=2/3x-3.
Hope this helps! :)
Find X (Its a circle question, PLEASE HELP)
Answers
Step-by-step explanation:
Since angles in the same segment are equal, Angle ABC (x) = Angle AOC.
Since Angles AOC and COD are supplementary, Angle AOC = 180° - 130° = 50°
Therefore x = 50°.
For a field trip 5 students rode in
cars and the rest filled ten buses.
How many students were in each
bus if 215 students were on
the trip?
Answers
Answer:
21 students
Step-by-step explanation:
215-5=210
210/10 =21
Quick question. Is the term “at least” < with equal sign or > with equal sign?
Answers
Answer:
if you mean that it look like this < or this > then its “less than or equal to“ or “greater than or equal to”
I hope this helped!!
OH and have a merry Christma!!!!!
If BC = 3x, CD = 7x, and BD = 10, what is BC?
Answers
Answer:
BC= 3
Step-by-step explanation:
Suppose a line BD is 10 and it has a point C somewhere on the line. It is given that BC is 3times and CD is 7 times or algebraically if we take x as a variable then according to the given information
BC+ CD= BD
3x+ 7x= 10
10x= 10
x= 10/10
x= 1
3x would give 3 (1)= 3
Hence the Line BC = 3
and the line CD= 7
i need an opinion, my other note is in anouther question. what do y'all think.
Dear Chelsea
I'm tierd of you scraching me
I mean I love you can't you see
You may not see it but your rude to Sue
you tell me a secret like the one about you know who
Do you like to hurt Sue and me
Dose it make very you happy
I'm done with all the disrespect
I always helped you last I checked
I'm always there for you
I have fun doing all the things we do
I love you like my own child
Evan though you're a little wild
Your pretty and strong
Your hair is not so long
But what do I care
I mean it's your hair
I geuss what I'm trying to say
Is that no matter what you do ill still love you anyway
You are my little cousin more like a sister
And I hope to be there when you get your mister
I may not always be there
But I want you to know I still care
So as I look up at the sky
I write this not to say goodbye
Answers
Answer:
good job its very good
Step-by-step explanation:
9.533, 9.527, 9.62, 9.58, 9.7
LESSER GREATER
HELP ASAP PLEASE
Answers
Answer:
9.527, 9.533, 9.58, 9.62, 9.7
Step-by-step explanation:
I hope this helps!!!!! HAVE A WONDERFUL DAY!!!
5.
Find the slope.
7x- y=-4
a) -1/7
b) 1/7
c) -7
I d) 7
Answers
Answer:
D. 7
Step-by-step explanation:
Answer:
kakaakasksjnxznxccchjvgv
Step-by-step explanation:
Drag each tile to the correct box. Not all tiles will be used. Consider the following función. F(x) = 4x + 7
Answers
9514 1404 393
Answer:
see attached
Step-by-step explanation:
Starting with the original function, swap the variables x and y, then solve for y. The resulting function is the inverse of the original function.
Answer: The person that answered at the top is a legend!! The picture below is just proof that he/she is right!! :)
Write two numbers that multiple to the value on top & add the value on the bottom.
Answers
Answer:
23040
This is because math.
It takes about 14 person-hours of labor to break up a driveway and clear away the rubble. It takes about 8 person-hours of labor to pour and smooth concrete for the new driveway.
Answers
Answer: 22 person-hours
Step-by-step explanation:
It takes 14 hours to break up the driveway and then to clear away the rubble.
Then it takes 8 hours to pour the concrete and smooth it.
Total time it will take to break up a driveway, clear away the rubble, pour the concrete, and smooth the concrete will therefore be;
= 14 + 8
= 22 person-hours
What is the value of the expression
3x - (y/2 + 5)
When x=3.5 y=4
A 0.5
B 1.2
C 2.5
D 3.5
Answers
Answer:
D 3.5
Step-by-step explanation:
Replace values in the equation with values given. Calculate.
Answer:
D: 3.5
Step-by-step explanation:
( pls answer if u know)
A. -2/3
B. -3/2
C. 2/3
D. 3/2
Answers
Answer:
your answer would be B I hope it's right
Answer:
B)
Step-by-step explanation:
I hope this helps:)
The points (4,16) and (−4,−16) are plotted on the coordinate plane using the equation y=a•x. How can you use the coordinates to find the value of a?
Answers
Answer: The graph of the linear equation is a set of points in the coordinate plane that all are ... If all variables represent real numbers one can graph the equation by plotting ... of values for x e.g. -2, -1, 0, 1 and 2 and calculate the corresponding y values
any more help just ask :)
a number x divided by 4
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Vanessa earns $6.00 per hour for watching the
neighbor's dog. How many hours does she have
to work to earn $132?
Answers
Frank and Erica are selling ribbons to raise money for the football team. The graph shows the linear relationship between the number of ribbons each of them has left to sell and the number of days that they have been selling the ribbons. On which day does it appear that frank and Erica will have the same number of ribbons left to sell?
Answers
Answer:
Day 18
Step-by-step explanation:
A student measures the wingspans of 40 local dragonfly specimens selected at random. The sample mean is 6.8 centimeters with a margin of error of 0.9 centimeters. Based on this information, what are plausible values for the mean wingspans of the population of local dragonflies?
Explain or show your reasoning.
Answers
Answer:
6.8 - 0.9 = 5.9
Step-by-step explanation:
5.9 is the only average that seemed reasonable. Hope I helped.
According to the margin of error, it is found that plausible values for the mean wingspans of the population of local dragonflies are between 5.9 and 7.7 cm.
What is the margin of error of a measure?It is about how much the measure can plausibly differ from the sample mean.
In this problem, considering the sample mean of 6.8 cm and the margin of error of 0.9 cm, the bounds of plausible values are given by:
6.8 cm - 0.9 cm = 5.9 cm.6.8 cm + 0.9 cm = 7.7 cm.More can be learned about margin of error at https://brainly.com/question/25779324
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