Answers
Answer:
Step-by-step explanation:
Look at the determinant.
a = k
b = 1
c = k
sqrt(b^2 - 4*k*k)
sqrt(1 - 4k^2)
The only way this can work out to repeated solutions is if k = +/- 1/2
That way 1 - 4(1/2)^2 = 0 or 1 - 4*(-1/2)^2 = 0
That way both solutions will be
-b / 2a
-1 / 2/(1/2) = - 1
or
-1 / 2(-1/2) = 1
So the answer is k = 1/2, - 1/2
Related Questions
What is the measurement of angle A?
Answers
Answer:
∠A = tan⁻¹ (35/12) ≅ 71.075 ° or 1.24 radians
Step-by-step explanation:
Since this is a right angled triangle, then we can use basic trigonometry to solve for ∠A.
We have the measure of the side opposite (35) and adjacent (12) to ∠A.
Since tan(x) = opp/adj
then tan (∠A) = 35/12
∴ ∠A = tan⁻¹ (35/12) [by taking the tan⁻¹ of both sides of the eq]
∠A ≅ 71.075 ° or 1.24 radians
A train traveled for 1.5 hours to the first station, stopped for 30 minutes, then traveled for 4 hours to the final station where it stopped for 1 hour. The total distance traveled is a function of time.
Which graph most accurately represents this scenario? (4 points)
A graph is shown with the x-axis labeled Time (in hours) and the y-axis labeled Total distance (in miles). The line begins at the origin and moves upward for 1.5 hours. The line then continues upward at a slow rate until 2 hours. From 2 to 6 hours, the line continues quickly upward. From 6 to 7 hours, it moves downward until it touches the x-axis
A graph is shown with the axis labeled Time (in hours) and the y axis labeled Total distance (in miles). A line is shown beginning at the origin. The line moves upward until 1.5 hours, then is a horizontal line until 2 hours. The line moves quickly upward again until 6 hours, and then is horizontal until 7 hours
A graph is shown with the axis labeled Time (in hours) and the y-axis labeled Total distance (in miles). The line begins at the y-axis where y equals 125. It is horizontal until 1.5 hours, then moves downward until 2 hours where it touches the x-axis. The line moves upward until 6 hours and then moves downward until 7 hours where it touches the x-axis
A graph is shown with the axis labeled Time (in hours) and the y-axis labeled Total distance (in miles). The line begins at y equals 125 and is horizontal for 1.5 hours. The line moves downward until 2 hours, then back up until 5.5 hours. The line is horizontal from 5.5 to 7 hours
Answers
Answer:
Graph B
Step-by-step explanation:
how do i get full marks? Have to write is sept by step that's what I did but only got 2 marks.
Answers
Answer:
x = 5 cm
Area = 56 cm²
Step-by-step explanation:
The perimeter of the triangle is given as : 21 cm
The two sides given are : 6 cm and 10 cm. The other side has a length of ;
21 - {6+10} = 21 - 16 = 5 cm
This means the value of x is 5 cm
The rectangle will now have its measurements as ;
Length = 7 cm
Width = x + 3 = 5+3 = 8 cm
The area of the rectangle will be :
A = l * w = 7 * 8 = 56 cm
Need help due today plssss
Answers
Answer:
y= -x/2-1
Step-by-step explanation:
The equation of the line in the slope-intercept form is y=2x−5
The slope of the perpendicular line is negative inverse: m=−1/2
So, the equation of the perpendicular line is y=−x/2+a
To find a, we use the fact that the line should pass through the given point: −4=(−1/2)⋅(6)+a
Thus, a=−1
Therefore, the equation of the line is y=−x/2−1
Answer: y=−x/2−1
That's my best in explaining.
Can someone help me in this plzz asap
Answers
Subtract 7x - 9 from 2x^2 - 11
Answers
Answer: 2x^2-7x-2
Step-by-step explanation:
= 4
Answer:
B) 2x^2-7x-2
l
It costs $3.50 for ¾ pound of chicken. How much does it cost for 1 pound of chicken?
Answers
Answer:
£4.38
Step-by-step explanation:
You need to find 1/4 and then add it on
Find the gradient of the line segment between the points (-4,2) and (4,5).
Give your answer in its simplest form.
Answers
Answer:
slope= (5-2)/ 4--4
= 3/8
y=3/8x+c
5=3/8(4)+c
5=3/2+c
5-3/2=c
3.5=c
y= 3/8x +3.5
Step-by-step explanation:
The gradient of the line segment between the points (-4, 2) and (4, 5) is 3/8.
What is Gradient of a Line?Gradient of a line is actually the slope of the line.
Slope of a line is the ratio of the change in y coordinates to the change in the x coordinates of two points given.
Slope can also be defined as the tangent of the angle that the line is making with the positive X axis.
Gradient of a line when two points (x, y) and (x', y') are given is,
Gradient, m = (y' - y) / (x' - x)
Here, given are two points (-4, 2) and (4, 5).
x = -4, y = 2, x' = 4 and y' = 5
Gradient = (5 - 2) / (4 - -4) = 3/8
Hence the gradient of the line segment between the given points is 3/8.
To learn more about Gradient of the Line, click on the link :
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You can buy 7 stickers for $4. Write a proportion that gives the cost c if you buy 10 stickers.
Answers
Answer:
10 stickers cost $5.70
Step-by-step explanation:
First, you want to see how much each sticker cost. So you want to do 4 divided by 7.
4/7 = .57
Now you want to take .57 times 10.
10 x .57 = 5.70.
10 stickers cost $5.70
Answer: 10 stickers cost $5.70
Step-by-step explanation:
hepl me please i am giving alot of points away
Answers
9514 1404 393
Answer:
(d) y = 3
Step-by-step explanation:
The line of symmetry is the horizontal line halfway between the top and bottom of the image. The y-value there is 3, so the horizontal line has equation ...
y = 3
1. What is a reciprocal?
The definition of a reciprocal
Answers
Answer:
a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.
Step-by-step explanation:
I think that's it
if y=3 when x=4,find y when x=6
Answers
Answer:
2
Step-by-step explanation:
(x)(y) = k Inverse relationship
(4)(3) = k
12 = k
(6)(y) = 12
y = 2
Answer:
When y=3, x=4 but when x=6, y is :---
[tex] \frac{3}{4} = \frac{y}{6} \\ y = \frac{3 \times 6}{4} \\ y = \frac{9}{2} \\ \boxed{ y = 4.5}[/tex]
★ Value of y is 4.5Question 10
Simplify the expression:
6 + 3(x + 4)
A
6 + 3x + 12
B
9x + 36
с
3x + 18
D
9x + 4
Answers
please help meeee
will give brainliest
Answers
Answer:
take the number she bought and put it over the amount there are being sold and is the chance of her WINNING and subtract that from 100 and there u go.
Step-by-step explanation:
^
bob is twice as old as alice at the moment in 4 years time their total age they will be 71 what is alice's age now?
Answers
Answer:
Alice is 34
Step-by-step explanation:
71 - 4 = 68
68 ÷ 2 = 34
Alice is 34 :)
CAN YOU PLSSSSSSSSSSSSSSSSSSS HELP ME WITH THIS
Answers
The Earth is 1.496 × 108 km from the Sun. Express this number in standard form.
Answers
Answer:
161.568
Step-by-step explanation:
use a calculator just multiply
Answer:
Step-by-step explanation:
the standard form is
1.496 × 10^8=149,600,000 km
HELP ME WITH THIS HURRY PLEASE.
Answers
The library is having a book sale. Hardcover books sell for $4 each, and paperback books are $2 each. If Ayanna spends $26 for 8 books, how many hardcover books did she buy?
Answers
Answer: 6
Step-by-step explanation: I divided $26 by $4
Answer: I don't really know how to explain, but I will give you the straight up answer
5 HARDCOVER BOOKS (would total up to $20)
3 paperback books (would total up to $6)
Step-by-step explanation:
plz answer only if correct.. i tried this problem many times and i keep getting the same answer..
Answers
Answer:
39
____________________________________________
Step-by-step explanation:
Since you want to find the variable x all you have to do is simple subtraction.
The two numbers (61 and 22). Subtract those numbers and you get 39. Now it wants you to round to the jearest hundredth but there is no hundreds place so we can round to the nearest tenth. Which would be 30! Hope it helped... :)!
Bye! I did this same answer on this same problem that you posted again.
A. A cylinder just fits into a cube of side length 36 m Calculate the percentage
of empty space in the box.
Answers
Answer:
21.5%
Step-by-step explanation:
volume of cube: 36x36x36
volume of cylinder: πx18²x36
Cylinder percentage: (πx18²x36) / 36x36x36 = π / 4 = 0.785
percentage of empty space: 1 - 0.785 = 0.215 (21.5%)
What is the contra post I’ve of this conditional statement
Answers
Answer:
Option (2)
Step-by-step explanation:
Statement p → If an animal is an adult insect
Statement q → It has six legs
Contrapositive statement means: -q → -p
"If not q then not p"
Therefore, costrapositive statement of the given conditional statement will be,
If the animal does not have six legs, then it is not an adult insect.
Option (2) will be the answer.
If the triangles are similar, find the value of x.
Answers
Answer:
x=25Step-by-step explanation:
the triangles are similar
so as we know
when two triangles are similar the rotio of triangles is equalnow let's solve it
to understand the solving stepsyou need to know aboutequation with fractionPEMDASaccording to the question
[tex] \frac{24}{30 } = \frac{x + 7}{2x - 10} [/tex]
[tex] \frac{4}{5} = \frac{x + 7}{2x - 10} [/tex]
[tex]4(2x - 10) = 5(x + 7) \: (cross \: multiplication)[/tex]
[tex]8x - 40 = 5x + 35[/tex]
[tex]8x - 5x = 35 + 40[/tex]
[tex]3x = 75[/tex]
[tex]x = 25[/tex]
There is more than one answer!
Answers
Answer:
I think it's B and D
Step-by-step explanation:
What is the volume?
Answers
The amount of space that a particular substance or object holds usually within a container.
Given the equation 5 + x - 14 = x - 7.
Part A. Solve the equation 5 + x - 14 = x - 7. In your final answer, be sure to state the solution and include all of your work.
Part B. Use the values x = -2, 0, 3 to prove your solution to the equation 5 + x - 14 = x - 7. In your final answer, include all of your calculations.
Answers
Answer:
x=0
Step-by-step explanation:
combine like terms on both sides of the equal sign
-9+x= x-7
move similar terms to the same side
-2=0x
divide both sides by x
x=0
Seth is two-thirds as tall as his father. If Seth is 54 inches tall, how tall is his father?
Answers
Answer:
81 inches tall
pls mark me brainliest
I had $13 my mom gave $10 my dad gave $30 my aunt and uncle gave me $100 I had another $7 how much did I have
Answers
Answer:
you would have $160
Step-by-step explanation:
13+10+30+100+7= 160
The total amount $160 he have.
Given that,
He had amount already = $13
His mom gave him = $10
His dad give him = $30
His aunt and uncle give him = $100
He had another amount = $7
We have to determine,
How much amount he have..
According to the question,
To obtain the amount he had add all the amounts.
Therefore,
Total amount he had = He had amount already + Her mom gave him + His dad gave him + His aunt and uncle give him + He had another amount.
Total amount he had = $13+ $10+ $30+ $100 + $7
Total amount he had = $160
Hence, The required amount he had is $160.
To know more about Addition click the link given below.
https://brainly.com/question/20709440
There are 5 people in Edgar’s family
Answers
Answer:
3 wholes. Each member will get 3/5 of a loaf.
Step-by-step explanation:
3 ÷ 5 = 3/5
Please mark Brainliest :)
Will give brain for question 7!!