Answer:
D. (2x+3) (x+5)
Step-by-step explanation:
there are many ways to factor the polynomial
Fine the value of x and y
x = 45° , y = 45
x = 177° , y = 177°
x = 27° , y = 63°
x = 63° , y = 27°
Answer:
x=180-(76+63)=41 degrees that is option 4
Step-by-step explanation:
Linear pair
find the area of the figure
Answer:
25 yards squared
Step-by-step explanation:
Answer:
area =27
Step-by-step explanation:
3. A truck leaves a depot at 11 AM and travels at a speed of 45 mph. At noon, a van leaves
the same place and travels the same route at a speed of 65 mph. At what time does the van
overtake the truck?
Answer:
The van overtakes the truck at 2:15 PM.
Step-by-step explanation:
A truck leaves a depot at 11 AM and travels at a speed of 45 mph.
The van leaves 1 hour later, so when the van leaves, the truck will be at position 45 miles. The equation for the truck's position is given by:
[tex]T(t) = 45 + 45t[/tex]
At noon, a van leaves the same place and travels the same route at a speed of 65 mph.
At noon, the van is at the position of 0 miles, and travels at a speed of 65 miles per hour. So, the equation for the vans' position is:
[tex]V(t) = 65t[/tex]
At what time does the van overtake the truck?
t hours after noon, in which t is found when:
[tex]V(t) = T(t)[/tex]
So
[tex]65t = 45 + 45t[/tex]
[tex]20t = 45[/tex]
[tex]t = \frac{45}{20}[/tex]
[tex]t = 2.25[/tex]
0.25 of an hour = 1/4 = 15 minutes.
Thus, the van overtakes the truck at 2:15 PM.
To find the quotient of 407.26 and 1,000, move the decimal point in 407.26
"#"
places to the
Left or right?
Answer:
Three places to the left
Step-by-step explanation:
It would be moved to the left because 407.26 is being divided by 1000, not multiplied. It would be 3 because there are three zeroes in 1000.
Answer:
left
Step-by-step explanation:
the number of places must correspond to the number of zeros.
for example. 407.26 and 100.
you need to move the point twice to the left. which will give you...4.0726.
3 and 3/4 - 2 and 1/5
Answer:
31/20 or 1 11/12
Hope this helps!
Im on a girls basketball team , 3 are in sixth grade , 5 are in seventh grade , and 6 are in eighth grade . so which is the ratio of seventh graders to eighth graders on the team ?
HELP ME PLEASEEEEEEEEEE
The oak tree is 11times as old as the garden the sum of their age is 108 years how old as is each the garden and tree?
Step-by-step explanation:
Oak tree -> 11 units
Garden-> 1 unit
Total-> 12 units which is 108 years
So, 1 unit is 9.
Garden-> 9 years
Oak tree-> 99 years.
In marketing, response modeling is a method for identifying customers most likely to respond to an advertisement. Suppose that in past campaigns 23.8% of customers identified as likely respondents did not respond to a nationwide direct marketing campaign. After making improvements to their model, a team of marketing analysts hoped that the proportion of customers identified as likely respondents who did not respond to a new campaign would decrease. The analysts selected a random sample of 1500 customers and found that 315 did not respond to the marketing campaign.
The marketing analysts want to use a one-sample z-test to see if the proportion of customers who did not respond to the advertising campaign, p, has decreased since they updated their model. They decide to use a significance level of α= 0.01.
Required:
a. Determine the value of the z-statistic. Give your answer precise to at least two decimal places.
b. Determine the p-value for this test. Give your answer precise to at least three decimal places.
Answer:
a) The value of the z-statistic is z = -2.55.
b) The p-value for this test is 0.0054.
Step-by-step explanation:
Suppose that in past campaigns 23.8% of customers identified as likely respondents did not respond to a nationwide direct marketing campaign. Test if this proportion has decreased:
This means that at the null hypothesis we test that if the proportion is still 0.238, that is:
[tex]H_0: p =0.238[/tex]
And at the alternate hypothesis we test if the proportion has decreased, that is:
[tex]H_a: p < 0.238[/tex]
The test statistic is:
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.
0.238 is tested at the null hypothesis:
This means that [tex]\mu = 0.238, \sigma = \sqrt{0.238*0.762}[/tex]
The analysts selected a random sample of 1500 customers and found that 315 did not respond to the marketing campaign.
This means that [tex]n = 1500, X = \frac{315}{1500} = 0.21[/tex]
a. Determine the value of the z-statistic. Give your answer precise to at least two decimal places.
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
[tex]z = \frac{0.21 - 0.238}{\frac{\sqrt{0.238*0.762}}{\sqrt{1500}}}[/tex]
[tex]z = -2.55[/tex]
The value of the z-statistic is z = -2.55.
b. Determine the p-value for this test. Give your answer precise to at least three decimal places.
The p-value of the test is the probability of finding a proportion below 0.21, which is the p-value of z = -2.55.
Looking at the z-table, z = -2.55 has a p-value of 0.0054
The p-value for this test is 0.0054.
Given the system of equations, what is the solution?
x + 2y = 7
x - 2y = -1
A.) {(-4, 6)}
B.) {(-8, -12}
C.) {(3,2)}
9514 1404 393
Answer:
C.) (3, 2)
Step-by-step explanation:
The coefficients of y are opposites, so we can add the two equations to eliminate y.
(x +2y) +(x -2y) = (7) +(-1)
2x = 6 . . . . . simplify
x = 3 . . . . . . matches choice C
RECREATION suppose of a group of students goes rollerblading while of the group plays beach volleyball. How much more of the group chooses to play beach volleyball than go rollerblading?
Answer:
I don't exactly get what your trying to ask since their isn't enough information. But in my opinion rollerblading is more fun, but people would rather play volleyball since it is a team effort
Step-by-step explanation:
ANSWER ASAP DONT SEND A FILE. IS THIS SHAPE A ROTATION, REFLECTION,TRANSLATION, DILATION OR NONE????
Answer:
translation
Step-by-step explanation:
same size just moved
Mark is sorting shapes. He has a group of shapes with these attributes:
4 sides
Exactly 2 right angles
Exactly 1 pair of parallel sides
Which shape belongs in this group?
100 Points!!!!! PLEASE HELP. Sarah’s neighbor offers to pay her $5 for every shark tooth she finds on the beach. After collecting only three shark’s teeth, Sarah decides to share the opportunity with her friend John. Sarah can find shark teeth twice as fast as John, but she can earn even more money with his help.
Sarah can use the expression 5(2j + 3 + j) to represent the amount of money they can earn.
Part 1: Writing Expressions
1. Write an expression that looks like Sarah’s expression: 5(2j + 3 + j). Replace the coefficients so that your expression is not equivalent. You may use any number that you choose to replace the coefficients. Be sure to leave the variables the same. For example, 8(3j + 7 + 3j) looks like Sarah’s expression but is not equivalent.
2. Translate the new algebraic expression you created in Question 1 to a verbal expression.
Part 2: Writing Equivalent Expressions
3. You will now use mathematical properties to create two expressions that are equivalent to the expression you created in Question 1. Make sure you show all steps in your work.
a. Use either the commutative property or combine like terms to create an equivalent expression.
b. Use the distributive property to create an equivalent expression.
4. Pick a number from 1 to 10. Use that number to verify your three expressions (the original, the one from 3a, and the one from 3b) are equivalent by substituting it into each expression. Show all your work for complete credit.
Part 3: Finish the Story
5. Write a few sentences to end Sarah’s story. How many shark teeth did she find? How many shark teeth did John find? How much money did they earn?
Step-by-step explanation:
Sarah’s neighbor offers to pay her $5 for every shark tooth she finds on the beach. After collecting only three shark’s teeth, Sarah decides to share the opportunity with her friend John. Sarah can find shark teeth twice as fast as John, but she can earn even more money with his help.
Sarah can use the expression 5(2j + 3 + j) to represent the amount of money they can earn.
Part 1: Writing Expressions
Q1. Write an expression that looks like Sarah’s expression: 5(2j + 3 + j). Replace the coefficients so that your expression is not equivalent. You may use any number that you choose to replace the coefficients. Be sure to leave the variables the same. For example, 8(3j + 7 + 3j) looks like Sarah’s expression but is not equivalent.
25(10j + 18 + 5j)
Your expression is good.
Q2. Translate the new algebraic expression you created in Question 1 to a verbal expression.
Skuttle offered to pay his sister Izzy $25 for every four-leaf clover she finds in the woods. Izzy finds 18 clovers but decides to get Roxy’s help. Izzy finds clovers twice as fast as Roxy but they will overall make more money together.
Your verbal expression is good. It reflects your chosen equation.
Use your knowledge of the mathematical properties to create two equivalent algebraic expressions for the algebraic expression you created in Question 1. Explain how you arrived at the equivalent expressions by showing all your steps and stating which properties you used.
Using commutative property of addition, the expression in question 1 can be rewritten as follows:
Using distributive property of multiplication over addition, the expression in question 1 can also be rewritten as follows:
Q 4. Use substitution to prove your algebraic expressions are equivalent. You may substitute any number for the variables you choose. Show all your work for complete credit.
Part 3: Finish the Story
Q5. Write a few sentences to end Sarah’s story. How many shark teeth did she find? How many shark teeth did John find? How much money did they earn?
Answer:
Step-by-step explanation:
Sarah’s neighbor offers to pay her $5 for every shark tooth she finds on the beach. After collecting only three shark’s teeth, Sarah decides to share the opportunity with her friend John. Sarah can find shark teeth twice as fast as John, but she can earn even more money with his help.
Sarah can use the expression 5(2j + 3 + j) to represent the amount of money they can earn.
Part 1: Writing Expressions
Q1. Write an expression that looks like Sarah’s expression: 5(2j + 3 + j). Replace the coefficients so that your expression is not equivalent. You may use any number that you choose to replace the coefficients. Be sure to leave the variables the same. For example, 8(3j + 7 + 3j) looks like Sarah’s expression but is not equivalent.
25(10j + 18 + 5j)
Your expression is good.
Q2. Translate the new algebraic expression you created in Question 1 to a verbal expression.
Skuttle offered to pay his sister Izzy $25 for every four leaf clover she finds in the woods. Izzy finds 18 clovers but decides to get Roxy’s help. Izzy finds clovers twice as fast as Roxy but they will over all make more money together.
Your verbal expression is good. It refrects your chosen equation.
Part 2: Writing Equivalent Expressions
Q3. Use your knowledge of the mathematical properties to create two equivalent algebraic expressions for the algebraic expression you created in Question 1. Explain how you arrived at the equivalent expressions by showing all your steps and stating which properties you used.
Using commutative property of addition, the expression in question 1 can be rewritten as follows:
25(10j + 18 + 5j) = 25(10j + 5j + 18)
Using distributive property of multiplication over addition, the expression in question 1 can also be rewritten as follows:
25(10j + 18 + 5j) = 250j + 450 + 125j
Q 4. Use substitution to prove your algebraic expressions are equivalent. You may substitute any number for the variables you choose. Show all your work for complete credit.
Now we can subsitute, say 7 for j.
For the first expression, we have:
25(10j + 5j + 18) = 25(10(7) + 5(7) + 18)
= 25(70 + 35 + 18) = 25(123) = 3,075.
For the second expression, we have:
250j + 450 + 125j = 250(7) + 450 + 125(7) = 1,750 + 450 + 875 = 3,075.
Thus, we can see that both expressions are equivalent.
Part 3: Finish the Story
Q5. Write a few sentences to end Sarah’s story. How many shark teeth did she find? How many shark teeth did John find? How much money did they earn?
Sarah found 3 + 7 = 10 shark teeth.
John found 10 / 2 = 5 shark teeth.
The total money they earned is $5 x 15 = $75.
1) an expression that looks similar would be (could be anything)
4(5j+8+4j)
2) It would become:
four times the sum of five times a number, eight, and four times the same number
3) equivalents would be 4(9j+8)
or:
4(5j)+4(8)+4(4j)
4) say J=1 for simplicity
4(9+8)
=4x17
=68
next one would be:
4x5+4x8+4x4
=20+32+16
=68
ok, this is correct.
5) Sarah found 10 shark teeth for $50. John found 5 shark teeth for $25. They got $75 from their neighbor in total.
Step-by-step explanation:
what is the constant rate change shown in the graph below?
Answer:
-3Step-by-step explanation:
Constant rate of change is the slope.
Find the slope using two points on the graph:
(0, 0) and (1, -3)The slope is:
m = - 3/1 = -3Answer:
the two points be
(0,0) and (1,-3)
slope [m]=[-3-0]/[1-0]=-3
constant rate is-3.
) A quality control engineer is interested in estimating the proportion of defective items coming off a production line. In a sample of 200 items, 28 are defective. a) Find the 95% confidence interval for the proportion of defectives from this production line b) Interpret the results (the interval) you got
Step-by-step explanation:
Here are the solutions:
For the sample size of 300, with 27 defectives, the sample proportion is p-hat = 27/300 = 0.09.
For a 90% confidence interval of a proportion, use z = 1.645.
The limits of the interval are then:
Lower limit = p-hat - z* sqrt(p-hat*(1 - p-hat)/n) = 0.09 - 1.645*sqrt(0.09*0.91/300) = 0.0628
Upper limit = p-hat + z* sqrt(p-hat*(1 - p-hat)/n) = 0.09 - 1.645*sqrt(0.09*0.91/300) = 0.1172
The 90% confidence interval is then (0.0628, 0.1172)
For the larger sample, assuming that the same proportion of defectives is found (p-hat = 0.09), the new confidence interval would be:
Lower limit = p-hat - z* sqrt(p-hat*(1 - p-hat)/n) = 0.09 - 1.645*sqrt(0.09*0.91/20,000) = 0.0867
Upper limit = p-hat + z* sqrt(p-hat*(1 - p-hat)/n) = 0.09 - 1.645*sqrt(0.09*0.91/20,000) = 0.0933
In this case, the 90% confidence interval is (0.0867, 0.0933)
Thanks,
Each factory at a candy company has 295 workers. There are 12 factories.
How many workers are employed at the candy company?
Solve on paper. Then check your answer on Zearn.
workers are employed at the candy company. what is the answer
Multiply number of employees at each factory by number of factories
295 x 12 = 3,540 total
PART C only
what is the volume of prism B if the volume of Prism A is 367.5in
Scale factor is 3:4
Height of prism B is 20in
NO LINKS OR RANDOM LETTERS!!!!
Answer:
The volume of prism B is 490 cubic inches.
Step-by-step explanation:
To determine what is the volume of prism B if the volume of Prism A is 367.5 inches, and the scale factor is 3: 4, the following calculation must be performed:
3 = 367.5
4 = X
4 x 367.5 / 3 = X
1,470 / 3 = X
490 = X
Therefore, the volume of prism B is 490 cubic inches.
lf 9/28 of the students at Williards High school participate in after school sports activities, what fraction of the students do not participate in after school activities
Answer: 19/28
Step-by-step explanation:
9/28 participate, so that means that ? dont participate.
28/28 = 1 whole
28 - 9 = 19
so 19/28 students do not participate in after school activities.
PLEASE HELP WILL MARK BRAINLEIST
15 POINTS....
Answer:
B or C
Step-by-step explanation:
Answer:
B is correct
Step-by-step explanation:
Solve the following inequality and represent your solution on a number line. [4+1]
3
4+3
≤
2
3
≤
2
+5
The question seems incomplete.
Help please ! Questions 1, 2, & 3 .
Answer:
9/25
2
3.5
Step-by-step explanation:
0.36 as a fraction :
(0.36 / 1)
Multiply both numerator and denominator by 100
36 / 100
Reduce to lowest form
Divide both numerator and denominator by 4
9/25
2.
√3 = 1.732
=2 (nearest whole number
3.)
Approximate value of √12
√12 = 3.4641016
= 3.5
Which iwo operations are needed to write the expression that represents four times the difference of a number and
three"?
multiplication and subtraction
division and subtraction
multiplication and addition
O division and addition
J
Answer:
multiplication and subtraction
Step-by-step explanation:
4(n-3)
Lisa wants to measure the height of a tree. She walks exactly 50 feet from the base of the tree and looks
up. The angle from the ground to the top of the tree is 72°. How tall is the tree?
Answer:
E
Step-by-step explanation:
E
Figure ABCD is transformed to obtain figure A'B'C'D':
(pic is below)
Part A: Write the sequence of transformations that changes figure ABCD to figure A'B'C'D'. Explain your answer and write the coordinates of the figure obtained after each transformation. (6 points)
Part B: Are the two figures congruent? Explain your answer. (4 points)
No links please :)
if u dont know the answer dont answer please:)
Please dont just answer for points :(
Answer:
A. Reflection over the y axis and a translation 4 units down
B. Yes because glide reflections preserve side and angle measures.
The cost of a car rental is $30 per day plus 20¢ per mile. You are on a daily budget of $94. Write and
solve an inequality to find the greatest distance you can drive each day while staying within your
budget. Use pencil and paper. Find 2 other two-step inequalities with the same solutions.
Answer: Read carefully.
Step-by-step explanation:
STEP 1
determine inequality
Car rental= $30 per day
Mileage= $0.20 per mile
m= number miles driven
Add daily rental charge to the quantity of (number of miles driven multiplied by the per mile charge). This has to be less than or equal to the budget of $94 a day.
$30+ ($0.20 * m) ≤ $94
$30 + $0.20m ≤ $94
Hope this helps! Have an amazing day!
The pie chart shows the results of a survey on
students' favourite subjects.
a What fraction of the students chose Science?
b 60 students chose Maths.
i How many students chose Languages?
ii How many students chose Other?
jii How many students took part in the survey?
Favourite subjects
380 1200
O Mathis
Languages
Science
Art
DOther
90° 42
sh
o
a
Answer:
Step-by-step explanation:
http://www.mrbartonmaths.com/resources/GCSE%20Revision/GCSE%20Maths%20Takeaway/2.%20Grade%20D/46.pdf
You can find it in this site
A quiz has 5 questions with answers that are either true or false. How many different combinations of answers are
possible?
Ο 10
Ο 16
Ο Ο Ο
25
Ο 32
find the perimeter of a rectangle if its breadth is (a+1)cm and its length is 2cm more than the breadth.
The table shows the record low temperatures in Juneau, Alaska for each of the 12 months of the year in degrees F. Record Low Temp Month Year (in °F) January -22 1972 February -22 1968 March -15 1972 April 6 1963 May 25 1972 June 31 1971 July 18 1895 August 27 1948 September 23 1972 October 11 1984 November -5 2006 December 1941 -21 According to the data, what is the range of the record low temperatures in Juneau, Alaska?
D. 31°
A. -22°
E. 53°
B. 4.67°
C. 8.5°
Answer: -22
Step-by-step explanation: the most repeated number ig
The temperature which repeats frequently is -22. the range of the record low temperatures in Juneau, Alaska is -22°.
What is temperature?Temperature is the measure of the degree of hotness and coldness.
The table shows the record low temperatures in Juneau, Alaska for each of the 12 months of the year in degrees F.
Record Low Temp Month Year (in °F)
January -22 1972
February -22 1968
March -15 1972
April 6 1963
May 25 1972
June 31 1971
July 18 1895
August 27 1948
September 23 1972
October 11 1984
November -5 2006
December - 21 1941
The temperature which repeats frequently is -22. the range of the record low temperatures in Juneau, Alaska is -22°.
Learn more about temperature ;
https://brainly.com/question/20295014