Answer:
Reject H0 if Z ≤ critical value
- 2.8747978 ≤ 1.645
Step-by-step explanation:
Setting the null and alternative hypothesis :
H0 : μ = 3.5
H1 : μ < 3.5
Sample size (n) = 40
Mean (m) = 3 minutes
Standard deviation (s) = 1.1 minutes
Test statistic : Z = (m - μ) / (s/√n)
Z = (3 - 3.5) / (1.1/√40)
Z = - 0.5 / 0.1739252
Z = - 2.8747978
Zcritical at α 0.05 = 1.645
This is a left tailed test :
Hence rejection region:
Reject H0 if Z ≤ critical value
- 2.8747978 ≤ 1.645
HELPPPPPPP BRAINLIESTTT
Answer:
7n+5 would get u the perimeter because you can add like terms together so I added all the ns to get that- hope that helps you ❣️
Step-by-step explanation:
simplify
3x+6y+5y-2y
please explain i need help :(
The drama club has $4000 to spend on their winter performance. They have already
spent $1500 on the set, and programs cost $1.75 each.
Thetinequality 1500 + 1.75x<=4000 can be used to determine the number
of programs, x, that can be ordered. Which statement about the number of
programs that can be ordered is true?
The drama club can purchase at least 1.428 programs
The drama club can purchase at most 1.428 programs
The drama club can purchase 1,429 programs
The drama club can purchase 4000 programs
Answer:
The drama club can purchase 1429 programs
Step-by-step explanation:
PLS HELP ASAP
What is the value of X?
The answer is 8 but I need to show the work pls help
Answer:
x = 8
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Geometry
All angles in a triangle add up to 180°Step-by-step explanation:
Step 1: Set up Equation
(7x - 1) + 80 + (6x - 3) = 180
Step 2: Solve for x
Combine like terms: 13x + 76 = 180Isolate x term: 13x = 104Isolate x: x = 8Answer: x = 8
Step-by-step explanation:
Hoped this helped
Determine whether or not the equation shows a proportional relationship. If it does, identify the unit rate (constant of proportionality).
y =25x, a = 5x + 5, m = 105.25n
Answer:
y = 25·x shows a proportional relationship
a = 5·x + 5 does not show a proportional relationship
m = 105.25·n shows a proportional relationship
Step-by-step explanation:
An equation that shows a proportional relationship is of the form, y = kx
Where;
k = The constant of proportionality = y/x
Therefore, the equation, y = 25·x shows a proportional relationship
The constant of proportionality = k = y/x = 25
Similarly, the equation m = 105.25·n shows a proportional relationship
The constant of proportionality = k = m/n = 105.25
When the equation shows a proportional relationship, the graph of the equation passes through the origin, therefore, the equation of the form, y = m·x + c, where c = the y-intercept > 0, the equation does not show a proportional relationship
The equation a = 5·x + 5, which is of the form, y = m·x + c, with c = 5 > 0, therefore, does not show a proportional relationship.
Therefore;
y = 25·x shows a proportional relationship
m = 105.25·n shows a proportional relationship
a = 5·x + 5 does not show a proportional relationship.
Eeeeeeeeeeeeeeeeeeeeeee
Which situation can the integer -4 represent?
Choose the correct answer below.
(A.) walking up 4 stairs
(B.) earning 4 dollars
(C.) gaining 4 yards
(D.) Walking down 4 stairs
Answer:
D
Step-by-step explanation:
because it's going down by 4 not going up so it would represent -4
What is m∠ABC?
A. m∠ABC = 60°
B. m∠ABC = 67°
C. m∠ABC = 120°
D. m∠ABC = 127°
Brainlist for the correct answer
Answer:
The answer is D I'm not sure
Answer:
127 degrees
Step-by-step explanation:
When you add up all three angles of a triangle, the sum will always be 180 degrees. Just add up the two known angles and that will equal Angle ABC because a straight line also equals 180 degrees
During the first week of a certain month, a computer store sells 11 computers. A sale begins on the second week of the week and during the second week the computer store sells 17 computers. What was the percent increase in sales from the first week of the month to the second week of the month ?
Answer:
The percentage increase in sales is 54.45%
Step-by-step explanation:
Here, we want to calculate the percentage increase
mathematically the increase in sales is 17-11 = 6
The percentage increase is ;
6/11 * 100% = 54.45%
Will give the brainiest!!
The graph below shows a line segment XY:
HERE ARE THE MULTIPLE CHOICE ANSWERS: What is the slope of the line segment XY?
−2
− 1 over 2
1 over 2
2
Meryl planted 270 plants in 45 equal rows. Find the unit rate.
Answer:
6 plants per row
Step-by-step explanation:
270 divided by 45 gives you 6, which is your individual value per row
Answer:
6 plants per row
Step-by-step explanation:
This is a fraction equal to
270 Plants ÷ 45 Rows
We want a unit rate where
1 is in the denominator,
so we divide top and bottom by 45
270 Plants ÷ 45
45 Rows ÷ 45
=
6 Plants
1 Row
=
6 Plants
Row
= 6 Plants per Row
Type the correct answer in the box. Use numerals Instead of words. Consider the function shown on the graph. у 8 8 02 4 2 2 X -10-8 -6 0 2 N- 6 6 8 10 -2 -4 -6 -8 Complete the statements to make them true,
domain x >
range y >
Answer:
Domain → [-5, ∞)
Range → [-2, ∞)
Step-by-step explanation:
Domain:
Domain of a function on from its graph is represented by the set of x-values (Input values).
Range:
Range of a function is a set of y-values (output values).
From the graph attached,
Graph starts from x = -5 and tends towards the infinity, so the domain will be,
Domain → [-5, ∞)
Similarly, y-values vary from y = -2 to y = ∞
Therefore, Range → [-2, ∞)
Given the graph of the function:
Domain is: [-5, ∞)
Range is: [-2, ∞)
Domain and Range of a FunctionThe domain of a function are all the values of x that are plotted on the x-axis, while the corresponding y-values are the range of the function.
Thus:
From the given graph representing a function:
Domain of the function is between -5 to infinity.
Range of the function is between -2 to infinity.
Therefore, given the graph of the function:
Domain is: [-5, ∞)
Range is: [-2, ∞)
Learn more abut domain and range of function on:
https://brainly.com/question/25915612
I need the answers ASAP ? No rocky ?
Answer:(-1,1) - (4,4)
Step-by-step explanation:
ez
16 Four biased coins, A, B, C and D are thrown.
The probability that each coin will land on Heads is shown in the table.
Coin
Probability
A
0.33
B
0.033
1
С
3
D
30%
i) which coin is least likely to land on Heads?
ii) Which coin is most likely to land on Heads?
Julie says ,
"The probability that coin C will land on Heads is the same as the probability that coin C will land on Tails."
b) Is she correct?
Give a reason for your answer.
Coin B is going to be thrown 4000 times
c) work out an estimate for the number of times coin B will land on Heads.
and also please give me step by step thanks x
Answer:
Step-by-step explanation:
There are no results for ADD YOUR ANSWERQuestion16 Four biased coins, A, B, C and D are thrown.The probability that each coin will land on Heads is shown in the table.CoinProbabilityA0.33B0.0331С3D30%i) which coin is least likely to land on Heads?ii) Which coin is most likely to land on Heads?Julie says ,"The probability that coin C will land on Heads is the same as the probability that coin C will land on Tails."b) Is she correct?Give a reason for your answer.Coin B is going to be thrown 4000 timesc) work out an estimate for the number of times coin B will land on Heads.and also please give me step by step thanks x
Check your spelling or try different keywords
Find the values of X and Y
Answer:
x=90, angle bisector theorem
y=43,
90+47+y=180
=137+y=180
y=43
The sum of two numbers is 40. One number is 4 times as large as the other. What are the numbers? Larger number: Smaller number:
Answer:
The answer is 8
Step-by-step explanation:
S×4+s=40
s×5=40
40÷5=8
Have a great day:)
How many 8ths of an inch are there in 3/4
Answer:One-half names the same number as two-quarter or as three sixths or as four-eights . Three-fourths is equal to six-eighths because they are different ways of expressing the same number.
Step-by-step explanation:
A family restaurant chain wants to test the market for a new menu item: a grilled chicken sandwich with chipotle salsa. They are interested in both how to market the item and the right price to charge for it. They decide to offer the sandwich at 60 different restaurants in the chain, using two different descriptions on the menu. Half the restaurants' menus will emphasize "healthy eating" and half will emphasize "value." These two groups of restaurants will be further divided in three groups, each charging either a High, Medium, or Low price for the sandwich. After a month, they will measure what proportion of customers order the new sandwich.
Answer:
Experimental units, factors & treatments in experiment.
Step-by-step explanation:
Experimental Units are the 60 restaurants.
Factors are the : Menu description & price
Treatments in experimental design : Healthy Low Price, Healthy Medium Price, Healthy High price & Value low price, Value medium price, Value high price.
How would I solve this? I tried and I got a reallly crazy number... I think I messed up somewhere. The question is... Jack and Mark work together on a job, but not equal hours. Mark gets paid $11 per hour and Jack gets paid $10 per hour. Together they worked 58 hours and earn a total of $601. How many hours did each one work?
I made these equations.
m+j=58
11m+10j
The first one I rearranged to m=58-j.
Answer:
Jack earns $37
Mark earns $21
Step-by-step explanation:
m + j = 58
11m + 10j = 601
j = 58 - m
11m + 10(58 - m) = 601
11m + 580 - 10m = 601
1m = 601 - 580
m = 21
j = 58 - m
j = 58 - 21
j = 37
what is the square root of 625
Answer:
25
Step-by-step explanation:
25 times 25 =625
Answer:
25
Step-by-step explanation:
for questions like these it is best to use a calculator
if you use a TI 84 calculator then press the blue button that says "2nd" and
then on that same column there will be a button that says [tex]x^{2}[/tex]
press these buttons then enter the number that you want to find the square root of
then press "enter" and your answer will be there
5-x< 13
Idk what it si
Answer:
Step-by-step explanation:
5-x< 13
-5 -5
-x< 8
Answer:
-8
Step-by-step explanation:
5-x<13
-x<13-5
-x<8
-x/-1<8/-1
x<-8
Help pls I am in 4th and my sister is at school so she can't help pls I was sick when we learned this I need like a couple more and then I can do the rest :(
Answer:
3/20
Step-by-step explanation:
you multiply 1/4 and 2/5 to get the answer
What is the approximate area of the circle shown below?
A. 94 cm2
B. 11,310 cm2
C. 2827 cm2
D. 188 cm2
Please help
Answer:
Step-by-step explanation:
we have the diameter =60 cm, the radius is 60/2=30 cm
A circle is 3.14*r^2=2827 cm^2
Answer: C. 2827 cm2
Step-by-step explanation:
The area of a circle is calculated by pir^2; r = the radius
In the diagram, the diameter is provided. The radius is half of the diameter. 60/2 = 30, so the radius is 30 cm.
Plug these values into the formula
A = 3.14*30^2
A = 2827.43, which would round to 2827 cm2
School lunches cost $224.75 for 15.5 weeks. About how much would the lunches cost per week?
Answer:$14.50
Step-by-step explanation:
Divide 224.75 by 15.5 and you will get the cost for per week.
An order is written for 1200 adult weight 164 pounds and is 5/9 all with a BSA of 1.9 m to the physician ordered o n c o v i n 2 mg / M2 for chemotherapy treatment of a malignant tumor. Oncovin is supplied as 1 mg/ml. What volume should the patient receive per dose?
Answer:
The volume per dose that the patient should receive is 3.8 ml
Step-by-step explanation:
The physician ordered oncovin 2 mg/m² for chemotherapy treatment of a malignant tumor.
The adult's BSA (Body surface area) = 1.9m²
Hence, the amount of oncovin needed based on his body weight is:
2mg/1 m² = x mg/1.9m²
Cross Multiply
x mg = 2mg × 1.9
x = 3.8mg
We are told , oncovin is supplied:1 mg/ml
Hence:
This means
1 mg = 1 ml
3.8 mg = x ml
Cross Multiply
x ml = 3.8 ml
The volume per dose that the patient should receive is 3.8 ml
The price of a ticket to a show was $18.30 after a 25% discount. What was the original price?
Answer:
24.40
Step-by-step explanation:
divide this by 3, which gets you 6.10, or 1/4 of the total, then add that onto the 18.30 and boom
Help me please!!!!!!!
Answer:
yes
Step-by-step explanation:
that symbol means <= which means x is less than OR equal to 5/2
Owen made exactly 72% of his free throws during the first half of the basketball season, and he made six free throws during the second half of the season. For the entire season he made exactly 60% of his free throws. What is the fewest possible number of free throws Owen could have attempted during the second half of the season?
Answer:
The fewest possible number of free throws Owen attempted is 15 throws
Step-by-step explanation:
From the first half,
72% = 72/100 = 18/25, reduced to its simplest ratio.
It means that he made at least 18 free throws in the first half of the season.
From the second half,
Let x be the fewest possible outcome of free throws, and the sum of total is 60% = 60/100 = 0.6
Considering the 6 free throws during the second half of the season,
(18+6)/(25+x) = 0.6
24/(25+x) = 0.6
Solving for x,
24 = 0.6(25+x)
24 = 15+0.6x
24-15 = 0.6x
9 = 0.6x
x = 9/0.6 = 15
x = 15 free throws
The fewest possible number of free throws Owen attempted is 15 throws
Ellen needs to make b batches of blueberry scones this weekend for her family's brunch party. She needs 2 cartons of blueberries for each batch, and each carton costs $4. Pick all the expressions that represent how much Ellen will spend on blueberries.
Answer:
Ellen will spend
$4(2b) on blueberries
Where b = number of batches of Blueberry scones she wants to make
Step-by-step explanation:
From the above question:.
Ellen needs to make b batches of blueberry scones this weekend for her family's brunch party.
Since she needs 2 cartons of blueberries for each batch, and each carton costs $4
1 batch = 2 cartons of blueberries
b batches =
Cross Multiply
b × 2 cartons
= 2b cartons of blueberries.
We also know that:
1 carton blueberries = $4
2b cartons of blueberries = x
Cross Multiply
x = 2b × $4
Therefore, Ellen will spend :
$4(2b) on blueberries
Which of the following DOES NOT equal 8%?
A.)0.08
B.)0.08
C.)8/100
D.)8.0%
E.)8.0%
F.)2/25
G.)4/5
Answer:
g
Step-by-step explanation:
8/100 is the same as 0.08 and 8,0% doesn't change and 2/25 is 8% as 1/25 is 4 so 2 would be 8 and it is g as 4/5 is 80%
PLEASE MAY I HAVE BRAINLIEST