x = lbs
y = total cost
ABC shipping: $7 + $1x = y
XYZ shipping: $10 + $0.75x = y
We set each equation equal to the other.
$7 + $1x = $10 + $0.75x. Subtract $7 from both sides and subtract $0.75x from both sides
$0.25x = $3. Divide each side by $0.25.
x = 12 lbs
When a package is 12lbs the cost is the same.
The faucet drips 6 ¾ gallons of water in 4 hours
what is the unit rate?
Answer:
1.6875 gallons per hour
Step-by-step explanation:
the area if the classroom is 144 square feet. if the room is a square, what is the length of each side?
Answer:
The length of each side is 12 feet because 12 multiplied by 12 is 144
hope it helps
Simplify 3-8n+5n+8 explain
Solve the compound inequality below:
0 < 2x – 10 < 20
Answer:5<x<15
Step-by-step explanation:
Answer:
Step-by-step explanation:
0<2x-10<20
If a<u<b then a<u and u<b
0<2x-10 and 2x-10<20
0<2x-10= x>5 2x-10<20 = x<15
Combine the intervals
x>5 and x<15
Solution: 5<x<15
Interval Notation: (5,15)
7 to the 14 th power divided by 7 to the 2nd power
Answer:
13841287201
Step-by-step explanation:
I typed it into a calculator.
Answer:
7^12 = 13841287201Explanation:
7^14/7^2 here we use the identity-(a^m/a^n=a^m-n)therefore the answer is 7^14-2 =7^127^12 = 13841287201.Hope it helps.....
:)
6x4-12\6 please help me
−45(9x−20)−3x=45x−6 Enter the value of x that makes this equation true.
Answer x=2
Step-by-step explanation:
Answer: x = 2
Step-by-step explanation: - 4/5*9x +4/5*20 - 3x= 4/5x- 6
-36/5*x+16-3x-4/5*x= -6
-36/5*x-15x/5-4/5*x=-6-16
-55/5*x=-22
-11x= -22
x= -22:(-11)
Hope this helps!!
I was slightly confused so please tell me if it's wrong.
Please help I'm having trouble with 2,3,4
Answer:
Your correct
Step-by-step explanation: x(-x) = -x
-5x-2x-1=-10
and the last one right too
Answer:
you were correct on 2/3
2. Negative
3. Negative
4. Negative
Step-by-step explanation:
...
Which set of ordered pairs represents a function?
{(-8,4),(-5,7),(-8, -1),(-4,8)}
{(-5, -5), (7,2), (-7, -3), (-7,0)}
{(-6,2).(-5,6),(-3,7).(-9, 2)}
{(-7,8), (-7,2), (7,6),(4,2)}
Which algebraic expression is equivalent to the expression below?
(6x + 10) + (8x - 2)
А.14x + 8
B. 24x-2
C. 14x + 12
D.16x-6
Answer:
A
Step-by-step explanation:
Add the Xs and subtract 2 from 10
Subtract 2x-1 from 3x+7 Anyone know this ?
Answer: x + 8
Step-by-step explanation:
Set up the expression (3x+7) - (2x-1)
Then, distribute the negative sign across the 2x and -1 to get 3x+7-2x+1
Combine like terms: 3x-2x+7+1
= x + 8
Ummmmmm Helppppppp Needeeeeeed
Answer:
I dont really know, but you dont have to listen but i think its D! its D!
Answer:
d: [tex]20(n-1)[/tex]
Step-by-step explanation:
[tex]2\left(n-7\right)-3\left(2-6n\right)[/tex]
Expand:
[tex]2n-2*7-3*2-(-3)*6n[/tex]
[tex]2n-14-6+18n[/tex]
[tex]2n+18n-14-6[/tex]
[tex]20n-20[/tex]
Factorise:
[tex]20(n-1)[/tex]
What is the solution of the equation 18 = 2x?
Answer:
x = 9
Step-by-step explanation:
Answer:
The answer is x=9
Step-by-step explanation:
18=2x, you divide both sides by 2 and you get 18/2 which equales 9.
Describe how to solve 2x + 36-4x -10 ) = 10 to a middle schooler. Show all the steps and tell
us how you can check if it is correct.
Answer:
First you would have to combine the numbers that are the same, so combine all the X's and the other numbers, with out a variable (without an X). The numbers with X are 2x and -4x, so you add them, you should have 2x (2+ (-4)= 2) your equation should look like this : 2x + 36 - 10= 10
Next you need to combine the other numbers, 36 and -10, add them, and you should get 26. Your problem should look like this 2x+26=10
Next you will need to subtract 26 from each side, what you do to one side of the equal sign you must do to the other. Your problem should look like this : 2x=-16
To find X you have to get X alone, so you have to divide how many x's there are, 2, so divide both sides by 2 (rembering that what you do to one side you must do to the other). So you should have x= -8
Step-by-step explanation:
NEED HELP!!! WILL MARK BRAINLIEST!!!
Answer:
1: 6
Step-by-step explanation:
Cross multiple 9 and 6
Cross multiple 8 and k, 8 and 6
8k + 6 = 54
-6 -6
8k= 48
divide by 8 on both sides
k = 6
What is the solution to the division problem below? (You can use long division
or synthetic division.)
x - x2 - 11x +3
x + 3
O A. x2 - 5x+1
O B. x2 - 6x + 1
O c. x2 - 4x + 1
O D. x2 - 7x+1
Answer:
C. x² -4x +1
Step-by-step explanation:
The synthetic division is shown below. The quotient corresponds to answer choice C.
"A clock is positioned on an auditorium wall with its center 9 feet above the floor. The second hand is 10 inches long and continuously moves around the clock. Let x represent the time in seconds measured from noon on a given day. Which f(x) represents the height above the floor, in feet, of the tip of the second hand?"
Answer: f(x) = 10in*cos(x*2*pi/60s) + 10in*sin(x*2*pi/60s) + 108in.
Step-by-step explanation:
When we have a circular motion, we can write this as:
f(x) = A*sin(k*x + f) + A*cos(k*x + f) + C.
where:
k is a constant that depends on the period.
f is a phase shift.
C is the mean height of the circular motion, in this case will be equal to the height of the center, that is 9ft.
C = 9ft.
A is the amplitude of the motion, in this case is equal to the radius, that is equal to the lenght of the second hand
A = 10in
But we should write both quantities in the same units, so we have:
1ft = 12in
then:
C = 9ft = 9*12in = 108in
Then our equation is:
f(x) = 10in*cos(k*x + f) + 10in*sin(k*x + f) + 108in
now, x = 0s coincides with the noon
so at x = 0s, the second hand is pointint to the twelve, this means that is in the max height, so we have:
F(0s) = 10in*cos(0 + f) + 10in*sin(0 + f) + 108 in
Now, the maximum value will be when the value inside the sinusoidals is 0.
(because cos(0) = 1 and sin(0) = 0)
then we have that f = 0.
Now, we know that it takes 60 seconds to do a full revolution, and for the sinusodial functions the period is 2*pi
Then we have:
c*60s = 2*pi
c = 2*pi/60s.
Then the equation is:
f(x) = 10in*cos(x*2*pi/60s) + 10in*sin(x*2*pi/60s) + 108in.
Answer:
B : 5/6cos(pi/30x)+9
Step-by-step explanation:
Edge 2020
Solve Ix - 11 > 4
A.{xlx <-5 or x> 5}
B. {xlx <-3 or x>5}
C.{xl-3
Answer:
A.
Step-by-step explanation:
-2 = K+7/3 find for k
Answer:
k = -13/3
Step-by-step explanation:
Step 1: Flip the equation.
k + 7/3 = -2
Step 2: Subtract 7/3 from both sides.
k+ 7/3-7/3 = -2 - 7/3
k= -13/3
Hope this helps!
MT&A uses the function f(x)=475-15x-15x.to depreciate smart phones. where f represents the value of smart phone and x represents the number of months since its purchase. a) find f^-1 and explain what it represents in this situacions When will the deprecated value of smart phone be less than $100.00? what does x represent in f^-1(x) =30? What is the value of x? Graph f(x) and f^-1 (x) on the same coordinate
Answer:
Find the answers in the explanation
Step-by-step explanation:
The given function is
f(x)=475-15x
A.) To find f^-1 and explain what it represents in this situacions, let f(x) = y. That is,
Y = 475 - 15x
Interchange y and x and make y the subject of formula
X = 475 - 15y
-15y = x - 475
Y = 475/15 - x/15
Y = (475 - x) / 15
Therefore,
f^-1(x) = (475 - x) / 15
If the function depreciates the smartphone, then, the inverse function will appreciate it.
When will the deprecated value of smart phone be less than $100.00
Substitute 100 for f(x) and find x
100 = 475 - 15x
-15x = 100 - 475
-15x = - 375
X = 375/15
X = 25
Therefore, the deprecated value of smart phone be less than $100.00 in the next 26 months.
what does x represent in f^-1(x) =30?
X represent the number of months for the smartphone appreciations
What is the value of x?
Substitute the inverse function for 30 and make x the subject of formula in the equation
f^-1(x) = (475 - x) / 15
30 = (475 - x) / 15
Cross multiply
450 = 475 - x
X = 475 - 450
X = 25 months
Graph f(x) and f^-1 (x) on the same coordinate
How do the measures of the angles of compare with those of when coincides with the other three triangles? What can you say about the preservation of the angle measurements of a shape during a rotation?
Answer:
The measure of each angle of angle ABC is equal to the corresponding angle of angle A' B' C' when angle A' B' C' coincides with the other three triangles. The measures of the angles of the triangle are preserved as the figure rotates.
Step-by-step explanation:
Answer:
The measure of each angle of angle ABC is equal to the corresponding angle of angle A' B' C' when angle A' B' C' coincides with the other three triangles. The measures of the angles of the triangle are preserved as the figure rotates.
Step-by-step explanation:
I will give brainliest please help!! Solve the top problem
Answer:
f(4) = 5
Step-by-step explanation:
f(4) means x=4
Using the function 4 >0 so using the lowest part
x+1 when x>0
4+1
5
f(4) = 5
Answer:
20. f(4) = 5
21. f(-6) = -6
22. f(0) = 0
23. f(-5) = -5
Step-by-step explanation:
The function is defined differently depending on the interval that x is in.
If x < -6, then f(x) = -2x^2 - 1. Definition A.
If -6 <= x <= 0, then f(x) = x. Definition B.
If x > 0, then f(x) = x + 1. Definition C.
For each value of the function you are asked to find in questions 20 through 23, the first thing to do is to see in which interval x is. Then you decide which function definition to use.
20. f(4)
4 is in the interval of Definition C.
f(x) = x + 1
f(4) = 4 + 1
f(4) = 5
21. f(-6)
-6 is in the interval of definition B.
f(x) = x
f(-6) = -6
22. f(0)
0 is in the interval of definition B.
f(x) = x
f(0) = 0
23. f(-5)
-5 is in the interval of definition B.
f(x) = x
f(-5) = -5
Tell whether the statement "All integers are rational numbers" is true or false. Explain your choice.
Answer:
True, all integers are rational numbers.
Step-by-step explanation:
Because each integer can be written as n/1 and integers can be positive and negative. For example, 3= 3/1 , 3 is the rational number. But all rational numbers like 1/2 =0.5 are not an integer. (fractions, decimals are not integers.)
When do u evaluate exponents in the order of operations??
Pls help I got 9 minutes to do this
Answer:
2nd
Step-by-step explanation:
Perenthasis
Exponets
Multiply
Divide
Add
Subtract
PLEASE HELP Mary organized her work below for solving the equation 3m-6=24.
Examine her work and answer the following questions.
In what step (or steps) did Mary make a mistake?
What did she do wrong and how should she fix it?
What should her answer be if she solved the problem correctly?
Be sure to answer in complete sentences.
Answer:
Mary messed up on the second step. She should have also added 6 to the 24. If she had solved the equation the correct way her answer would have been m=10
Step-by-step explanation:
3m-6=24
Add 6 on both sides
3m=30
Divide by 3 on both sides
m=10
solve for x
[tex]\frac{3}{2}(x-2)-5=19[/tex]
to whoever helps thank you so much! <3
Evaluate f(t)=-2t2+ 1 for f(-3).
Answer:
7
Step-by-step explanation:
First, plug-in f(-3) into t in the function:
[tex]f(-3)=-2(-3) +1[/tex]
Second, multiply -2 and -3 to get 6:
[tex]f(-3)=-2(-3)+1[/tex]⇒[tex]f(-3)=6+1[/tex]
Third, add 6 and 1 to get your answer:
[tex]f(-3)= 6+1[/tex]⇒[tex]f(-3)=7[/tex]
Is 4.63 less than 4.14
Answer:
No, you should have learned this in 5th grade
Step-by-step explanation:
What is the answer to 8)555 with the remainder and this is division.
Answer:
69 <-- quotient
---
Step-by-step explanation:
8)555
48
--
75
72
--
3 <-- remainder
Velvet fabric costs $11.49 a yard. Yvette buys 9.3 yards. Yvette's estimated cost of the velvet is
$20.
$99.
$104.
$120
Answer:
$99
Step-by-step explanation:
11.49 is estimated to 11
9.3 is estimated to 9
1 yard cost $11 what of 9
11×9=99
Answer:
99 is your anwser⇔
Step-by-step explanation:
