Answer:
Solving a system of inequalities is almost like solving a system of equations. Pretend that the inequality signs are equal signs for a moment. Then, solve the system for the two unknown variables just like how you would solve for in a system of equations.
But, there's a catch. If you divide both sides of the inequality by a negative number, you have to flip the inequality sign. For example, if you are trying to solve the inequality -x > 4 you would have to divide both sides of the equation by -1. We would get x < -4 (see how I switched the inequality sign from > to <).
Once you find the values of x and y (they will be an inequality), graph the solutions.
Which graph shows the solution set for 2x+3>-9?
Look at the picture
Answer:
it's the last one
Step-by-step explanation:
2x+3>-9
2x>-12
x>-6
Answer:
D
2x+3>-9
Move the constant the the right
2x>-9-3
Calculate
2x> -12
Divide both side
x> -6
(-6,+ 00)Bianca buys 4 band shirts and 3 pairs of pants for $159, and Gianna buys 3 of the same shirts and 2 of the same pairs of pants for $113.
How much does it cost to buy 5 band shirts and 5 pairs of pants?
Answer:
$150
Step-by-step explanation:
ok, so first you want to create your equations. let s=shirts, and p=pants. 4s+3p=159, and 3s+2p=113. next you want to get one variable in each equation to be the same. I multiplied the first by 2 and the second by 3 to make the ps the same. now we subtract our equations. (9s+6p=339) - (8s+6p=318) this gives you s=21. Now we put that in to solve for p, it doesnt matter which of the 4 equations. 4(8)+3p=159 = 3p=127 = p=42 1/3. now we just multiply them to find the cost of 5 of each. which is the answer above.
1. Two angles supplementary to congruent angles are supplements True/False
2. The Converse of a false conditional is always true, True/False
3. Postulates may not be used as reasons in a proof, True/False
Answer:
false is the first answer the second one is false and the third one is True
Step-by-step explanation:
1. False
2. False
3. True
PLZ PLZ PLZ PLZ PLZ PLZ PLZ HELP!!!!!
Answer:
equal
Step-by-step explanation:
just read
Answer:
i would say all equilateral traingles are acute triangles.
Step-by-step explanation:
pls help, i wasn't paying much attention in class and this seems pretty hard for me :(
Answer: 9= -1.5 or -3/2
10= -11/6 or 1.8333
11= -10.9
12= 3.535
13= Town A is -3.33 Town B is -3 2/5, 2/5= .44, so town B is colder, as it is -3.44
14= I'm not sure about number 14, sorry about that
9.
Explanation: So for question 9, you need to find the LCD (Least common denominator) so you list out the multiples of 8 and 4, when doing so, you find out that 8 is the LCD of both, since 8 is both a multiple of itself and of 4.
So, to get the answer, you do 4 * 2 and anything you do to the denominator (bottom number), you do to the nominator (top number).
So now you have -8/3/8 +6/2/8 then you just add the nominators and whole numbers like normal. You get, -2/1/8 (Remember you are adding a positive number to a negative number.)
Answer: -2/1/8
10.
Explanation: Same process as question 9.
Answer: -4/1/12
11.
Explanation: Read -7.3 out loud, it would be negative seven and 3 tenths, that makes it easy to convert as a fraction. It would be -7/3/10. Do the same for the other number, and you have -3/6/10, then you just add. You get -10/9/10.
Answer: -10/9/10
12.
Explanation: Same process as question 11. (You're in the thousandths now.) You get 3/535/1000. Reduce.
Answer: 3/107/200
13.
Explanation: You have 2 options here, to convert the decimal into a fraction, or to convert the fraction into a decimal, I'll be changing the fraction into a decimal, you wanna write it as a 10 as a denominator, so to get to 10 you multiply the denominator by 2, and anything you do to the denominator, you do to the nominator. So, -3/2/5 as a decimal is: -3.4, then you go ahead and compare them and you can see that the temperature in town A is colder.
Answer: The temperature in town A is colder.
14.
Explanation: For this one, you just subtract or add the amount to 7number. The dates don't matter, just telling you to do it in that order.
60.68 + 75.50 = 136.18
136.18 - 25.16 = 111.02
111.02 - 82.05 = 28.97
28.97 + 59.95 = 88.92
Answer: $88.92
Which of the following does NOT reflect the number line
Answer:
B
Step-by-step explanation:
The number line shows that x must be greater than or equal to 0 and less than but not equal to 3. This means that the only answer that does not reflect this is 0<x<3, because again, x must be greater than or equal to 0. Not just greater than.
Answer:
(0,3)
Step-by-step explanation:
it's coordinates for a 2 dimensional graph, not a 1 dimensional graph
which equation could represent each graphed polynomial function
PLEASE HELP FAST!!!
Answer:
y = x⁴- 5x² + 4
y = x(x + 3)(x - 2)
Step-by-step explanation:
1). y = x⁴- 5x² + 4
= x⁴- 4x² - x² + 4
= x²(x² - 4) - 1(x²- 4)
y = (x² - 1)(x² - 4)
y = (x - 1)(x + 1)(x - 2)(x + 2)
Therefore, zeros of this polynomial are,
x = -2, -1, 1, 2
From the given graphs, first graph has the zeros (x-intercepts) as x = -2, -1, 1, 2.
So the graph (1) represents the polynomial → y = x⁴- 5x² + 4
2). Second graph shows the x-intercepts at x = -3, 0, 2
Since, y = x(x + 3)(x - 2) is the polynomial with x intercepts at x = -3, 0, 2
Therefore, y = x(x + 3)(x - 2) represents the second graph.
A squirrel runs across a road in 3 seconds. The road was more than 34 feet wide.
_______________________________________________________
Which inequality can be used to determine the squirrel’s speed?
_____
What is the solution to the inequality? Round to the nearest tenth, if necessary.
_____
How can you interpret the solution?
_____
_______________________________________________________
A) 3r > 34,
3r 34
r/3 11.3
r 10.2
C) the squirrel ran at least 11.3 feet per second
the squirrel ran faster than 11.3 feet per second
the squirrel ran no faster than 102 feet per second
the squirrel ran slower than 102 feet per second
_______________________________________________________
Answer:
✔ 3r > 34
✔ r > 11.3
✔ The squirrel ran faster than 11.3 feet per second.
Step-by-step explanation:
1. The Squirrel's speed is 3r > 34
2. The solution of the inequality is r > 11.3
3. The interpretation is: The squirrel ran faster than 11.3 feet per second.
What is Inequality?Mathematical expressions with inequalities are those in which the two sides are not equal. Unlike to equations, we compare two values in inequality. Less than (or less than or equal to), greater than (or greater than or equal to), or not equal to signs are used in place of the equal sign.
A squirrel runs across a road in 3 seconds.
The road was more than 34 feet wide.
1. The Squirrel's speed is
3r > 34
2. The solution of the inequality is
r > 34/3
r > 11.3
3. The interpretation is: The squirrel ran faster than 11.3 feet per second.
Learn more about Inequality here:
https://brainly.com/question/30231190
#SPJ7
Calculate 8/9-2/3 giving your answer in its simplest form.
Answer:
(8/9) - (2/3) = (8-6)/9 = 2/9 = 0.22
See attachment for math work and answer.
Helppp will mark brainliestttt
Answer:
A is the answer I think
Step-by-step explanation:
The answer is A.
f(x) = x 2
Write an equation in slope-intercept form (0,3) (2,2)
help me im dying and i
Answer:
The better bar to buy is the Nutty Crunch
Step-by-step explanation:
4.74 / 6 = 0.79 per bar
7.80 / 10 = 0.78 per bar
:)
Answer:
Nutty Crunch is better
Step-by-step explanation:
393828294×3838383838229
Answer:
I think this is the answer
Step-by-step explanation:
1511664158726899051326
help plzzzzzz as soon as possible
Answer:
when x = -5 y is -48
when x is -1 y is -8
when x is 0 y is 2
when x is 1 y is 12
Step-by-step explanation:
Annie needs $30 to buy a coat she has saved $12 and plans to work as a baby siter to earn $6 per hour which inequality shows the minimum number of hours, n, that annie should work as a babysitter to earn enough to buy a coat?
a 12 + 6n ≤ 30, so n ≤ 3
b 12 + 6n ≥ 30, so n ≤ 3
c 6n ≥30 + 12, so n ≥ 7
d 6n ≤30 + 12, so n ≤ 7
Answer:
The answer would be B. 12 + 6n is greater than or equal to 30, so n is less than or equal to 3.
explanation:
I'm bad with explaining things, but I'll try my best to explain why this is the right answer.
12 + 6n ≥ 30, so n ≤ 3
let's start with the 12 at the beginning of the inequality, Annie already has $12, so the 12 in the inequality shows the amount of money she already has being added to the $6 per hour of babysitting she needs to do (n).
Now for the + 6n, the plus is there to show that the $12 Annie already has is being added to the 6n. The 6n then represents the $6 Annie makes each hour and the n represents how many hours she needs to babysit in order to get $30. The 6 is being multiplied by the amount of hours she needs to babysit to show how much money Annie would make. Then you add on the $12 she already has.
Annie then needs at least $30, but if she makes more than $30 then she will simply have more money than needed, therefore you use the greater than or equal to sign to show that she can have more money than just $30 after working.
I hope this helps, and sorry if my explanation is hard to understand lol.
Does f(-x) = - f(x)? Why?
Answer:
No
Step-by-step explanation:
-x is only in the parenthesis not outside. Whatever your number is, let's say 2 would be x, you input 2 as x in which you get f(-2)
hope this helps :)
Evaluate fourth root of 9 multiplied by square root of 9 over the fourth root of 9 to the power of 5
Answer:
The answer = 1/3 = .3333333....
Step-by-step explanation:
Gregory may choose between two accounts in which to invest $5000. Account A offers 2.3% annual interest compounded monthly. Account B offers continuous compound interest. Greg plans to leave his investment untouched (no further deposits and no withdrawals) for 10 years.
need help calculating account b's balance
Answer:
see below
Step-by-step explanation:
principal = $5,000
interest rate = 2.3%
account A: compound monthly for 10 years
account B: compound continuously for 10 years
account A: compound monthly for 10 years
A = P (1 + r/12)^ r*t
= $5,000 (1 + .023/12)^ 12(10)
= $6,291.6
account B: compound continuously for 10 years
FVn = PV * e^r*t
= $5,000 * e ⁽⁰ ⁰²³ˣ¹⁰⁾
= $6,293
Gregory may chose account B. (but the difference is only $1.40)
Gregory may choose account B.
Given that,
Principal = $5,000 .The interest rate = 2.3% .Account A: compound monthly for 10 years .Account B: compound continuously for 10 years
Based on the above information, the calculation is as follows:
For Account A[tex]A = P (1 + r\div 12)^ {r\times t} \\\\= $5,000 (1 + .023\div 12)^ {12(10)}[/tex]
= $6,291.6
For account B
[tex]FVn = PV \times e^{r\times t}\\\\ = $5,000 \times e^ {0.023\times 10}[/tex]
= $6,293
Therefore we can conclude that Gregory may choose account B.
Learn more: brainly.com/question/17429689
Ivian scores 58 out of 80 marks in a maths test what is his score as a percentage
Brett has 2/3 a pound of a pound of almonds to divide equally among 4 bags. Find the amount of almonds that will be in each bag.
Answer:
true
Step-by-step explanation:
Answer:
2.665 ounces approximately or .1665625 pounds
Step-by-step explanation:
Simplify each expression
(e^2) (g) (g^4) (e^3)
(e)( e^2) (e)
Answer:
(e^2) (g) (g^4) (e^3)=e^b
(e)( e^2) (e)=ve^4
Step-by-step explanation:
On Monday, Melvin rode his bicycle 8.25 miles. On Tuesday, he rode 12.23 miles and on Wednesday he rode 10.48 miles. How many miles did he ride at the end of the the 3 days?
Answer:
PLZ MARK BRAINLIEST!
The answer is 30.96 miles.
Step-by-step explanation:
8.25+12.23+10.48 = 30.96 miles
Answer:
The answer is 30.96 miles.
Step-by-step explanation:
8.25+12.23+10.48 = 30.96 miles
I hope this helps!
Expand. If necessary, combine like terms. (x-5)^2=
Answer:
x^2 - 10x + 25
Step-by-step explanation:
(x - 5)^2
(x - 5)(x - 5)
x^2 - 5x - 5x +25
x^2 - 10x + 25
Hope this helps!
Answer:
x²-10x+25
Step-by-step explanation:
Khan academy
(x−5)² = x²-10x+25
How much will you get paid if you work 28.5 hours for $7.75 per hour?
Step-by-step explanation:
Answer:-Here, Unitary Method is used. It tells:-
[tex]\bf{1 \ hour =}[/tex] $ [tex]\bf{7.75}[/tex]
[tex]\bf{28.5 \ hours =}[/tex] $ [tex]\bf{(7.75 \times 28.5)}[/tex]
$ [tex]\bf{220.875}[/tex] is the answer.
Hope it helps :D
Who here is amazing at math and is willing to help me every time I need help with math?!
Answer:
Me
Step-by-step explanation:
Because I am really good at math
You but a new laptop for 300 . The sales tax is 6% .what is the total cost for the laptop including the sales tax
Answer:
The total cost for the laptop including the sales tax is, $318
Step-by-step explanation:
Answer:
$318
Step-by-step explanation:
You start with your $300. Then you multiply that by 6% or 0.06 to get 18, which is the sales tax. Then you add those 2 together
Help please will give brainly
Answer:
Its A
Step-by-step explanation:
Answer:
a
Step-by-step explanation:
The amount of money increases by 5 each hour
Please help me i will give brainlist please...
Answer: All i know is you have to multiply all of those numbers because its area
Step-by-step explanation:
please help asap
is x= -3 what is the value of |x-4|-x^2
thank you
Answer:
16
check your math
|(-3)-4|=7
-3^2=-9
7-(-9)=16
welcome <3
78 % of the class scored a C or above on their test. If there are 35 students in the class, how many scored a C or higher? Write and solve a proportion for this situation.
Answer:
27 students
Step-by-step explanation:
[tex]\frac{78}{100} =\frac{x}{35} \\[/tex]
cross multiply and you get 27
All this question is trying to ask is to find 78% percent of the total number of student in the class.
So first convert 78 to decimal by dividing it by 100: [tex]\frac{78}{100} = 0.78[/tex]
Next multiply that with the total number of students which is 35.
So, [tex]0.78 * 35 = 27.3[/tex]
Now I don't think there can be a decimal here. The question must be wrong or the percentage might be incorrect. But, just for sake, we'll round it up so the final answer would be: [tex]27[/tex]
The proportion would be: [tex]273:10[/tex]
