Answer:
x^3 - 5x^2 - 11x - 21
Step-by-step explanation:
(x - 7) (x^2 + 2x + 3)
use distributive property, basically means multiply
x^3 + 2x^2 + 3x - 7x^2 - 14x - 21
add like terms
x^3 - 5x^2 - 11x - 21
A plastics manufacturer has developed a new type of plastic trash can and proposes to sell them with an unconditional 6-year warranty. To see whether this is economically feasible, 20 prototype cans are subjected to an accelerated life test to simulate 6 years of use. The proposed warranty will be modified only if the sample data strongly suggests that fewer than 90% of such cans would survive the accelerated test. After the accelerated life test on the 20 prototype cans, 13 survive. Does this indicate that the proposed warranty should be modified? Use =0.05.
Answer:
since -3.73 is less than 1.645, we reject H₀.
Therefore this indicate that the proposed warranty should be modified
Step-by-step explanation:
Given that the data in the question;
p" = 13/20 = 0.65
Now the test hypothesis;
H₀ : p = 0.9
Hₐ : p < 0.9
Now lets determine the test statistic;
Z = (p" - p ) / √[p×(1-p)/n]
= (0.65 - 0.9) /√[0.9 × (1 - 0.9) / 20]
= -0.25 / √[0.9 × 0.1 / 20 ]
= -0.25 / √0.0045
= -0.25 / 0.067
= - 3.73
Now given that a = 0.05,
the critical value is Z(0.05) = 1.645 (form standard normal table)
Now since -3.73 is less than 1.645, we reject H₀.
Therefore this indicate that the proposed warranty should be modified
Give the domain and range.
a. domain: {3, 0, 3), range: {3, 0}
b. domain: {-3, 0, 3), range: {0, 3}
c. domain: {3, 0,3), range:{-3.0}
d. domain: (3, 0, 3), range: {0,3}
Given:
The graph.
To find:
The domain and range of the graph.
Solution:
The three points on the graph are (-3,3), (0,0) and (3,3).
We know that, domain is the set of input values or x-values. So,
Domain = {-3,0,3}
We know that, Range is the set of output values or y-values. So, elements for range are 3,0,3. But a set contains only distinct elements. So, consider 3 once in range.
Range = {0,3}
Therefore, the correct option is b.
Please solve this for me bc I’m too dumb.
Answer:
600 Beans
Step-by-step explanation:
1/3÷4/5
(first ne to awnser get brain and 50 points)
Answer:
5 over 12
Step-by-step explanation:
The marketing department of a company has a budget of $30,000 for advertising. A television ad
costs $1000, a radio ad costs $200, and a newspaper ad costs $500. The department wants to
run 60 ads per month and have as many radio ads as television and newspaper ads combined. How
many of each type of ad should the department run each month? Just set up your system!
Answer:
17
Step-by-step explanation:
they should run 17 in each one
Please help. What is
3 divided by 3/4
Answer:
4
Step-by-step explanation:btw can i have brainliest?
To find 40% of 75, Priya calculates 2/5⋅75. Does her calculation give the correct value for 40% of 75? Explain or show how you know
Answer:
what the dude on top said is correct
Step-by-step explanation:
Answer:
Yeah Priya's calculation is correct .
Step-by-step explanation:
Simply 2/5 = 0.4
multiply it by 75
it's 30
Which is 40 % of 75
Hope you got it.
Mark as Brainliest Please.
If a triangle has a 30° angle and a 60° angle, then the hypotenuse of the triangle is twice the
length of the smallest leg of the triangle.
True
False
What is the cross-sectional area of a cement pipe 2 in. thick with an inner diameter of 5 ft? Use pie 3.14.
Answer:
1.60 [tex]ft^{2}[/tex]
Step-by-step explanation:
Assuming that this is a cylindrical pipe, the area can be determined by applying the formula for calculating the area of a circle.
i.e Area = [tex]\pi[/tex][tex]r^{2}[/tex]
So that,
for the inner part of the pipe,
r = [tex]\frac{diameter}{2}[/tex]
= [tex]\frac{5}{2}[/tex]
= 2.5 feet
Area of the inner part of the pipe = [tex]\pi[/tex][tex]r^{2}[/tex]
= 3.14 x [tex](2.5)^{2}[/tex]
= 19.625
Are of the inner part of the pipe is 19.63 [tex]ft^{2}[/tex].
Total diameter of the pipe = 5 + 0.2
= 5.2 feet
r = [tex]\frac{5.2}{2}[/tex]
= 2.6 feet
Area of the pipe = [tex]\pi[/tex][tex]r^{2}[/tex]
= 3.14 x [tex](2.6)^{2}[/tex]
= 21.2264
Area of the pipe is 21.23 [tex]ft^{2}[/tex].
Thus the cross sectional area = Area of the pipe - Area of the inner part of the pipe
= 21.2264 - 19.625
= 1.6014
The cross sectional area of the cement pipe is 1.60 [tex]ft^{2}[/tex].
I haven't the slightest idea of what thou answer are54/9
Answer:
The answer is 6
Step-by-step explanation:
The answer is 6 because 54 divided by 9 is 6
P.S Can I have brainliest?
Things such as Advil and Tylenol are not dangerous because anyone can purchase them.
True
False
Answer:
They arent really dangerous bc anyone can literally buy them but like all medication its not good to take more than the recommended amount.
Casey needs to put a rectangular wall that measures 3 1/8 ft by 6 and 1/2 ft if Casey has painted half of the wall how many square feet does she still need to paint
Answer:
Step-by-step explanation:
10 5/32
Need help please on this please
Cora ran 5 miles last month and will run
what is 2 times 3 plus 57 - 100
Answer:
-37
Step-by-step explanation:
2 x 3 + 57 -100
we do something called pemdas
We start with multiplying first
2 x 3 = 6
Then we do addition
6+57 = 63
then we subtract
63- 100 = -37
Answer:
-37
Step-by-step explanation:
assuming this equation is written correctly, you have to multiply first, think about PEMDAS
2x3=6
then you add. adding and subtracting, you do whichever is first in the math sequence.
6+57=63
63-100= -37
hope this helps :)
PLEASE CAN SOMEONE HELP????
Answer:
A) Side EG
Step-by-step explanation:
A consultant charges $20 for each hour she works on a consultation, plus a
flat $40 consulting fee. How many hours of work are included in a $200 bill
for a consultation?
An alien blob started with a mass of 4 kg and is doubling in size every day. How large will the blob be after 2
weeks? y = a(b)
Answer:
65,536 kg
Step-by-step explanation:
The sum of 6 and w is greater than it equal to -26 ???
Answer:
6+w≥-26
Step-by-step explanation:
is this what you wanted?
Answer:
6+w≥-26
Step-by-step explanation:
Consider the data set. 2, 4, 6, 8, 9 (a) Find the range. 7 (b) Use the defining formula to compute the sample standard deviation s. (Round your answer to two decimal places.) (c) Use the defining formula to compute the population standard deviation σ. (Round your answer to two decimal places.)
Answer:
A) 7
B) 2.588
C) 2.3151
Step-by-step explanation:
Need help
Please answer anyone show work
Answer:
it is d 100%
Step-by-step explanation:
Answer:
its D i would show work but ion have my phone i did this before
Step-by-step explanation:
Multiply 3 and 457 together. Round to the nearest hundredth when necessary.
Answer:
1400
Step-by-step explanation:
Answer:
1371 or 1401
Step-by-step explanation:
multiply 3 times 457 the round
Part A: Explain why the x-coordinates of the points where the graphs of the equations y = 4x and y = 2x−1 intersect are the solutions of the equation 4x = 2x−1. (4 points)
Part B: Make tables to find the solution to 4x = 2x−1. Take the integer values of x between −4 and 4. (4 points)
Part C: How can you solve the equation 4x = 2x−1 graphically? (2 points)
Answer:
Part A: They intersect because they cross at the same point when graphed.
Part B:
{,-4 -3, -2, -1, 0, 1, 2, 3, 4}
4x = {.0039, .015, .0625, ..25, 1, 4, 16, 64, 256}
2x−1 = {.031, .625, .125, .25, .5, 1, 2, 4, 8}
Part C: 4x = 2x−1 You would have to plug in each number until x equals the same number for both sides of the equation.. In this equation it would be x=-1.
Step-by-step explanation:
Plzz mark brainiest?
Write an equation for the line through the point (7, 7) with slope 5 in point-slope form y = y0+m(x-x0)
Answer:
y = 5x - 28
Step-by-step explanation:
y - y1 = m(x - x1)
y - 7 = 5(x - 7)
y - 7 = 5x - 35
add 7 to both sides to get rid of - 7 --> y = 5x -35 + 7
Which statement is true?
a. Multiplying decimals less than one is taking a part of a whole.
b. Multiplying decimals less than one is finding a part of a part.
c. Multiplying decimals less than one can be shown as repeated addition.
d. Multiplying decimals less than one can be shown as repeated subtraction.
Answer:
b. Multiplying decimals less than one is finding a part of a part.
Step-by-step explanation:
A part of a given number implies a selected part of a given number which can be expressed as a fraction of the number. Example, the half of any number is [tex]\frac{1}{2}[/tex].
The product of a part and another part can be expressed as;
[tex]\frac{1}{3}[/tex] x [tex]\frac{2}{3}[/tex] = [tex]\frac{2}{9}[/tex]
or,
[tex]\frac{1}{2}[/tex] x [tex]\frac{1}{2}[/tex] = [tex]\frac{1}{4}[/tex]
or,
[tex]\frac{1}{2}[/tex] x [tex]\frac{2}{3}[/tex] = [tex]\frac{2}{6}[/tex] = [tex]\frac{1}{3}[/tex]
The three examples shows: a part x a part.
Therefore, it would be observed that multiplying decimals less than one is the same as finding a part of a part.
Determine if the point (12, 20) is on the
graph of y = 2x – 5. Justify your answer.
Answer:
456[67]98
Step-by-step explanation:
Answer:
Step-by-step explanation:
for the point (12,20) to be on the graph the equation of the line has to be true.
y=2x-5 so is it true that
20= 2*12-5
20=19 false
so the point is not on the graph
The ratio of three numbers is 4 : 5 : 3. The sum of the numbers is 54. List the numbers in ratio form.
Answer:
13.5 : 18 : 22.5.
Step-by-step explanation:
let the numbers be 3x , 4x and 5x
3x+ 4x + 5x = 54
12x = 54
x = 4.5
so the numbers are 3*4.5, 4 * 4.5 and 5 * 4.5
= 13.5, 18 and 22.5.
The list of the numbers in ratio form is 18 : 22.5 : 13.5
Given the ratio of three numbers as 4 : 5 : 3
Total ratio = 4 + 5 + 3
Total ratio = 12
If the sum of the numbers is 54.
For the ratio of 4:
= 4/12 * 54
= 1/3 * 54
= 18
For the ratio of 5:
= 5/12 * 54
= 270/12
= 22.5
For the ratio of 3:
= 3/12 * 54
= 1/4 * 54
= 13.5
Hence the list of the numbers in ratio form is 18 : 22.5 : 13.5
Learn more here: https://brainly.com/question/19793310
PLEASE HELPPP !!!
The sales tax on a $1080 computer is $64.80. What is the rate of sales tax?
The price of a car is $25,990. If the sales tax rate is 6.5%, then how much sales tax is being charged?
Answer:
1) 6%
2) $1,689.35
Step-by-step explanation:
1) Given the following
Sales tax = $64.80
Price of the computer = $1080
Required
rate of sales tax
Using the expression
x% of 1080 = 64.80
x/100 * 1080 = 64.80
10.80x = 64.80
x = 64.80/10.80
x = 6%
Hence the rate of sales tax is 6%
2) Given the following
Price of the car = $25,990
Tax rate = 6.5%
Sales tax charged = 6.5% of $25,990
Sales tax charged = 6.5/100 * 25,990
Sales tax charged = 6.5 * 259.9
Sales tax charged = $1,689.35
hence the sales tax being charged is $1,689.35
What is the value of s?
___ units
Please help im marking brainiest
Answer:
search it up o the internet maybe
Step-by-step explanation:
