Answers
Answer:
D
Step-by-step explanation:
Given
a² - 1 = 0 ( add 1 to both sides )
a² = 1 ( take the square root of both sides )
a = ± [tex]\sqrt{1}[/tex] = ± 1
solution is { 1, - 1 } → D
Answer:
D) {1, -1}
Step-by-step explanation:
Please share the instructions for this problem: Solve a^2 - 1 = 0, or find the roots of a^2 - 1 = 0.
Answer D is correct. Try substituting 1 for a, and then -1 for a. In both cases the given equation is true.
Related Questions
What is the slope of the line that passes through the points (5, -11) and (-2, 10)?
Answers
What two perfect squares does 11 sit in
between?
Answers
A system of equations is shown below:
2x = 5y + 4
3x − 2y = −16
What is the solution to this system of equations? (5 points)
Answers
Answer:
x = -8, y = -4
Step-by-step explanation:
First we want to write the equations so the variables line up
[tex]2x - 5y = 4\\3x - 2y = -16\\[/tex]
Next, we could either multiply one of the equations to cancel out the x's or the y's, either one works.
I will choose to cancel out the x's
[tex]-3R_1 + 2R_2\\-6x + 15y = -12\\6x - 4y = -32[/tex]
add the equations and solve
[tex]11y = -44\\y = -4[/tex]
once you have one variable, you can use it to solve the other
[tex]2x - 5(-4) = 4\\2x + 20 = 4\\2x = -16\\x = -8[/tex]
verify
[tex]3(-8) - 2(-4)\\-24+ 8\\-16\\[/tex]
it works
X = -8
Y = -4
Here is the working
You buy a pair of jeans at a department store. A receipt, titled "Department Store". It shows the bill for a pair of jeans. Jeans, 39.99; Discount, negative 10.00; Subtotal, 29.99; Sales Tax, 1.95; Total, 31.94. The line at the bottom reads, Thank You. a. What is the percent of discount to the nearest percent? The percent of discount is %. b. What is the percent of sales tax to the nearest tenth of a percent? The percent of sales tax is %. c. The price of the jeans includes a 60% markup. After the discount, what is the percent of markup to the nearest percent? The percent of markup is %.
Answers
Answer:
25%
6.5%
35%
Step-by-step explanation:
Given the invoice :
Bill for a pair of Jean
Jeans ______39.99
Discount ___ - 10.00
Subtotal ____ 29.99
Sales tax ____ 1.95
Total _______ 31.94
A) % of discount to the nearest %
Discount amount = % discount * price
10 = x% * 39.99
10/39.99 = x%
0.2500625 = x%
x = 0.2500625 * 100%
% discount = 25%
% of sales tax:
Sales tax amount = % tax * Subtotal
1.95 = x% * 29.99
1.95/29.99 = x%
0.06502 = x%
x = 0.06502 * 100%
x = 6.5%
Markup before discount = 60%
Markup after discount = (60 - 25)% = 35%
Abbey wants to use her savings of $1,325 to learn yoga. The total charges to learn yoga include a fixed registration fee of $35 and a monthly fee of $50. Choose the inequality that would be used to solve for the maximum number of months for which Abbey can learn yoga with her savings.
Answers
Answer: 35x+50x_<(less than or equal to)1,325
Step-by-step explanation:
it’s easy and I’m taking the test and got it right
( worth 74 points and brainliest pls help)
Answers
Answer:
40 CMStep-by-step explanation:
If you check the measurement
of the other line, it will NOT match the one
on the side. It is a few centimeters bigger than the bottom.
hope this helps! <3
Answer:
[tex]\Large \boxed{\sf 40}[/tex]
Step-by-step explanation:
The triangle is a right-angled triangle
Use Pythagorean Theorem formula to solve for hypotenuse
[tex]\displaystyle c=\sqrt{a^2+b^2}[/tex]
Substitute in the values
[tex]\displaystyle c=\sqrt{24^2+32^2}=40[/tex]
a number k is less than 3 units from 10
Answers
Answer:
-7 < k < 7
Step-by-step explanation:
The absolute value of the variable k will be less than 7.
What is the solution to the equation?The distribution of weights to the variables involved that establishes the equilibrium in the calculation is referred to as a result. The analysis of mathematical representations is algebra, and the handling of those symbols is logic.
Making anything easier to accomplish or comprehend, as well as making it less difficult, is the definition of simplification.
A number k is less than 3 units from 10. Then the equation is given as
k + 3 < 10
Simplify the equation, then the value of the variable k will be
k + 3 < 10
k < 10 - 3
k < 7
The absolute value of the variable k will be less than 7.
Your question was incomplete, your question was probably be...
A number k is less than 3 units from 10.
What's the absolute value inequality?
More about the solution of the equation link is given below.
https://brainly.com/question/545403
#SPJ2
A dock is constructed using a regular polygon with 60 sides. The polygon rotates each minute, making one full revolution each hour. How much has the polygon rotated after 7 minutes? O 14 O 21 O 35 O 42
Answers
Answer: 42
Step-by-step explanation:
Did the test
Please help! I’ll give BRAINLIEST :))
If the converse of a statement is true, can you determine wether the inverse of the statement is true without seeing the actual statement? Explain please!
Answers
Answer:
yes
Step-by-step explanation:
well converse is
If q, then p
and inverse is
If no p, then not q
butttttt lets put this in human terms
If I am allergic to donuts, then I don't like to eat donuts.
and the inverse is
If I don't like to eat donuts, then I am allergic to donuts.
It is true no matter what! However, there could also be other reasons you don't liek donuts but nonthless this is one true reason that exists bc converse.
im failing pls help !!!!!
Answers
Answer:
ill suck ya wang
Step-by-step explanation:5$ and ill suck yo wang to do your homework
Answer:
It is C.
Step-by-step explanation:
If you multiply 2 times 2 you get 4. Then multiply 4 by 5 and you get 20.
Therefore, it is C.
Find the rate of change
Answers
Answer:
6 to 4 or 3 to 2
Step-by-step explanation:
To sove we need to find hypatonuse which you can do by counting across the bottom whichis 4 units and across the top which is 6 units so 6/4 which is 3 to 2 or 6 to 4
Solve for g: 4gh+3=−8
Answers
Answer:
-2.75h-1
Step-by-step explanation:
Li wants to add these items to her suitcase: a hairdryer (1.25 lb), a hand-held video game (0.6 lb), an extra video game (0.25 lb), and a music player (0.4 lb). Using the inequality x Less than or equal to 2.25, can she add all these items to the suitcase? If not, what could be left out to be closest to the maximum weight allowed? Explain.
Answers
Answer:
She will leave an extra video game which weighs 0.25lb
Step-by-step explanation:
Li wants to add these items to her suitcase: a hairdryer (1.25 lb), a hand-held video game (0.6 lb), an extra video game (0.25 lb), and a music player (0.4 lb). Using the inequality x ≤ 2.25, can she add all these items to the suitcase? If not, what could be left out to be closest to the maximum weight allowed?
Solution:
Weight of the items
hairdryer = 1.25 lb
hand-held video game = 0.6 lb
an extra video game = 0.25 lb music player = 0.4 lb
The total weight of the items
= 1.25lb + 0.25lb + 0.6lb + 0.4lb
= 2.5 lb.
Total weight - required weight
= 2.5lb - 2.25lb
= 0.25lb
2.5lb is 0.25lb greater than 2.25lb
Therefore, not all items can be added.
She has to leave out an item equivalent to 0.25lb
Item equivalent to 0.25lb is the extra video game
If Li leaves out the extra game, which weighs 0.25 lb, she’d have the maximum weight allowed.
Answer:
The total weight of the items is 1.25 + 0.25 + 0.6 + 0.4 = 2.5 lb. 2.5 is 0.25 greater than 2.25, so not all the items can be added. If Li leaves out the extra game, which weighs 0.25 lb, she’d have the greatest possible weight allowed.
Step-by-step explanation:
A line has the equation y = 0.5x + 12. What is the equation of a line parallel to this line?
Answers
Answer:
y = 0.5x + b, b ∈ ℜ - {12}
Step-by-step explanation:
A designer determined the annual profit in dollars from selling t- shirts using p (n) = 10n - 50, where n the number t-shirts sold. What is the annual profit if the designer sells 100 t- shirts
F. $8,050
G. 10,000
H. 1,000
J. $950
Answers
Answer:
J. $950
Step-by-step explanation:
p(n)= 10n-50
p(n)=10(100)-50
P(n)=1000-50
950
write a situation to represent the equation y=0.5x
Answers
Answer:
Johnny earns 50 cents each hour, x.
Step-by-step explanation:
Answer:
Ariana wanted to buy cashews at the grocery store. Cashews are $0.5 per ounce. If Ariana has $10 how many ounces of cashews can she buy
-1/2 x+1 = -x+8
choices:
7
1/2
14
18
Answers
Answer:
14
Step-by-step explanation:
can you please mark this brainliest if it helped? <3
Answer:
x =14
Step-by-step explanation:
-1/2 x+1 = -x+8
Add x to each side
-1/2 x +x+1 = -x+x+8
1/2x +1 = 8
Subtract 1 from each side
1/2x +1-1- =8-1
1/2x = 7
Multiply each side by 2
1/2x *2 =7*2
x =14
Is anyone good a geometry
Answers
Answer:
IT dependsssss
Step-by-step explanation:
what kind?
A community orchestra is losing money. They have always sold tickets for
$12, but they decide to increase the price by $3. For their next concert, they
sell 200 tickets at the increased price.
Select the expression representing the amount of money earned from ticket
sales.
Answers
Answer:
$3,000
Step-by-step explanation:
you add $3 to $12 and that's $15.so,know you multi..15 by 200.
Which one?
A or B.
Answers
Answer:
A) 600
Step-by-step explanation:
Sooo 3 x -5 = -15
then -4 x 10 = -40
Next -40 x -15 = 600
Since it's a negative times a negative the outcome is gonna be positive. Also I just broke down the problem into two parts and then multiplied the two answers together since it was called for.
if x+y=10 and x-y=6 , what is the value of x³-y³
Answers
Answer:
[tex]\huge\boxed{x^3-y^3=508}[/tex]
Step-by-step explanation:
[tex]\underline{+\left\{\begin{array}{ccc}x+y=10\\x-y=6\end{array}\right}\qquad|\text{add the sides of the equations}\\.\qquad2x=16\qquad|\text{divide both sides by 2}\\.\qquad\boxed{x=8}\\\\\text{Substitute it to the first equation}\\8+y=10\qquad|\text{subtract 8 from both sides}\\\boxed{y=2}\\\\x^3-y^3=8^3-2^3=512-8=504[/tex]
how do I solve -15+w=6
Answers
Ans
Add 15 to 6 so w= 21
Step-by-step explanation:
What is the value of x?
Enter your answer in the box.
Answers
Step-by-step explanation:
114° thats what i got when i calculated
to find the total measure of degrees for any shape use the formula:
(n-2)180, where n= number of sides
there are 7 sides in this shape, so plug in 7 for n:
(7-2)180, which equals 900°
next, subtract all the angles in the shape to find x:
900 - 139 - 121 - 125 - 126 - 158 - 120 = 111
answer: x = 111°
PLEASE HELP ME I WILL FAIL IF YOU DON'T
Answers
Answer:
42 students
Step-by-step explanation:
70% of 100 students is 70 so 70 times 60%=4200. 4200/100=42
Please read and analyze the prompt and answer both A and B to receive full credit. Both parts of the question must be written in a complete sentence.
a. On a hot day, a football team drank an entire 50- gallon cooler of water and half as much again. How much water did they drink?
b. Jada has 12 library books checked out and Han has LaTeX: \frac{1}{3}1 3 less than that. How many books does Han have checked out?
Answers
Answer:
b. Graph each equation. c. How long will it be before Alberto has read more ... Since the answer works in both equations, (3.1, 115) ... First, solve the first equation for y to get 2x − 6 = y.
What’s is the absolute value of -6? use the number line to help answer the question.
Please help I’ll mark you brainliest and give you a good rating!
Answers
Answer:
6
Step-by-step explanation:
So, the absolute value of −6 will be the distance from −6 to 0 on the number line, and it is 6.
Answer:
C (6)
Step-by-step explanation:
The absolute value of -6 is 6 since it's 6 spots away from the 0 on the number line
Solve each equation for x.
8. d= f+ fx
Answers
Answer:
(d/f)-1=x
Step-by-step explanation:
d=f+fx
d-f=fx
(d-f)/f=x
(d/f)-1=x
Aha:/ help me please
Answers
Step-by-step explanation:
y<3x-6,x=0 for y>-3x-5,y=0
y<-6 x<-5/3
y=0,x>2 x=0, y>-5
therefore, values of x will be 2<x>-5/3
and values of y will be -5<y>-6
so the point will be (-9,-1)
hope it helps.
What is the speed of a car that is traveling at 75,000 meters in 5,400 seconds.
Answers
Answer:
13.9
Step-by-step explanation:
Speed=distance/time
S=75,000/5,400
S=13.8 repeating OR (rounded) 13.9 m/s
I’ll give you 10 points and brainley
Answers
Answer:
Srry bro this is way to blurry for me to read... Also dont show your password to randoms.
Step-by-step explanation: