Answer:
3 packages
Step-by-step explanation:
each package has 3
if she buys 1, she has 3 party favors
buys 2, has 6
buys 3, has 9
she can't buy 2 packages, then one friend doesn't get a party favor. so she will have to buy 3 packages, use 7, leave 2 extra.
please give thanks :)
Mary should buy 3 packages to have enough for all the friends.
What is words problem?A word problem is a few sentences describing a 'real-life' scenario where a problem needs to be solved by way of a mathematical calculation.
Given that, Mary is planning her birthday party. She's inviting 7 friends and wants to buy party favours. The favours she wants to come in packages of 3.
Since, Each package has 3 favours
if she buys 1, she has 3 party favours
If buys 2, has 6
And, if buys 3, has 9
she can't buy 2 packages, then one friend doesn't get a party favour.
So, she will have to buy 3 packages, use 7, leave 2 extra.
Hence, she will need 3 packages.
For more references on word problems, click;
https://brainly.com/question/2610134
#SPJ6
Sorry for the blurry picture I'm in a rush if anyone could help me that would be amazing
Answer:
y=1/2x
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form y/x=k or kx
The value of the constant k is equal to the value of the slope m
In this problem we have the point (8,4)
Find the value of k
y/x=k------> substitute the value of x and y
4/8=k
k=1/2
The equation is equal to
y=1/2x
The air pressure P is inversely proportional to the altitude h. write the related variation equation
Step-by-step explanation:
P * h = k, where k is a real constant.
Kate walks 5 miles in 2 hours at a steady pace. how far can she walk in 1 hour and 15 minutes? If answered, you get the brain crown thing
Answer:
2.8125 mile
Step-by-step explanation:
hope its right
Can someone explain this problem to me?? After a price reduction of x%, an item has its price increased to its original value. What was the percent of increase? Express your answer as a common fraction in terms of x.
Answer:
[tex]We\ are\ given\ that,\\Percent\ of\ reduction=x_-\\So,\\Let\ the\ percent\ of\ increase\ be\ x_+\\Let\ the\ original\ price\ of\ the\ item\ be\ y\\Let\ the\ price\ after\ the\ decrease\ be\ z\\.\\Hence,\\y-\frac{x_-}{100} =z\\ z+\frac{x_+}{100}=y\\By\ simply\ adding\ the\ equations,\\(y+z)+(- \frac{x_-}{100}+\frac{x_+}{100})=(z+y)\\Hence,\\- \frac{x_-}{100}+\frac{x_+}{100}=0\\Hence,\\ \frac{x_-}{100}=+\frac{x_+}{100}\\Hence,\\x_-=x_+\\[/tex]
[tex]Hence,\ the\ percent\ of\ increase\ is\ same\ as\ the\ percent\ of\ decrease.[/tex]
Ariana has a dimes and y nickels. She has at most 12 coins worth a minimum of
$0.85 combined. Solve this system of inequalities graphically and determine one
possible solution.
9514 1404 393
Answer:
see attached (7 dimes, 5 nickels)
Step-by-step explanation:
The inequalities are plotted in the attachment. The solution shown is ...
(x, y) = (7, 5)
7 dimes and 5 nickels are 12 coins worth $0.90. This is the maximum number of coins, worth more than $0.85.
solve the inequality for n 14
Answer:
14n
Step-by-step explanation:
just rearrange the number with the variable
A researcher took a poll of people in his state. He asked each person if he or she had any pets (Yes or No) and to state his or her political party affiliation (Republican, Democrat, or Other). If the researcher computed a chi square test of independence using the responses, what would the degrees of freedom value be
Answer:
DF = 2
Step-by-step explanation:
Formula for degree of freedom is;
DF = n - 1
Where n is sample size
In this question, political party affiliation could be Republican, Democrat, or Other. Thus, sample size is 3.
DF = 3 - 1
DF = 2
Thus, degree of freedom value would be 2
Find two positive numbers such that the sum of the first and twice the second is equal to 124 and whose product is a maximum. For your answer, type in the larger of the two numbers.
Answer:
Answer is in photo
Step-by-step explanation:
Suppose that scores on a particular test are normally distributed with a mean of 140 and a standard deviation of 18. What is the minimum score needed to be in the top 5% of the scores on the test? Carry your intermediate computations to at least four decimal places, and round your answer to one decimal place.
Answer:
153.16
Step-by-step explanation:
We solve using z score formula
z = (x-μ)/σ, where
x is the raw score = ???
μ is the population mean = 140
σ is the population standard deviation = 8
Top 5% means the score is in the 95th percentile
The z score of 95th percentile = 1.645
1.645 = x - 140/8
Cross Multiply
1.645 × 8 = x - 140
13.16 = x - 140
x = 13.16 + 140
x = 153.16
Therefore, the minimum score needed to be in the top 5% of the scores on the test is 153.16
Which statement describes the rate of change of the following function?
f(x) = -5x - 7
A.
The function has a varying rate of change when x < 7.
B.
The function has a varying rate of change when x < 5.
C.
The function has a constant rate of change, decreasing for all x at a rate of 7.
D.
The function has a constant rate of change, decreasing for all x at a rate of 5.
Given:
The function is
[tex]f(x)=-5x-7[/tex]
To find:
The rate of change of the given function.
Solution:
We have,
[tex]f(x)=-5x-7[/tex] ...(i)
It is a linear function because the degree or power of x in this function is 1.
Slope of a linear function is always constant.
The slope intercept form of a linear function is
[tex]f(x)=mx+b[/tex] ...(ii)
where, m is slope and b is y-intercept.
On comparing (i) and (ii), we get
[tex]m=-5[/tex]
It means, the function has a constant rate of change, decreasing for all x at a rate of 5.
Therefore, the correct option is D.
TVs are measured by
their diagonals. If a 60
inch TV has a height of
24 inches, how wide is
the screen?
Answer:
Step-by-step explanation:
Diagonal is 60 inches, height is 24 inches so
60^2 = 24^2 + width^2
6.25 inches
Javier worked out the following on his math homework: “What equation best represents the relationship between x and y in the graph?" Javier’s answer was y= -4x - 2. Is he correct? If not, explain what he did wrong AND give the correct answer. *
12 points
Answer:yes he is correct
Step-by-step explanation: if you go on a certain site and you put in the equation, you press enter then it will pop up with what you want to do. Press graph, then you can compare the graphs and if it is the same you know it is correct
PLEASE HELP!!!
Which of the following values could x represent in the bar diagram?
ABC or D?
9514 1404 393
Answer:
both C and D are correct
Step-by-step explanation:
The diagram shows that x is the total of $40 and 20% of $40.
Description A would be represented by the difference of $40 and 20% of $40, not the sum.
Description B would be represented by 20% of $40, not the sum of that and $40.
Both descriptions C and D are properly represented in the diagram.
Mrs. Arnold took a survey of the types of pants her students were wearing. She collected the data below. What percent of her students were wearing shorts? Jeans: 14 Shorts: 9 Capris: 2
Answer:
36%
Step-by-step explanation:
Jeans: 14
Shorts: 9
Capris: 2
Total number of students = Number of Jeans + Number of Shorts + Number of Capris
Total number of students = 14 + 9 + 2 = 25
% of students wearing shorts = Number of shorts / Total number of students * 100
% of students wearing shorts = 9 / 25 * 100 = 0.36 * 100 = 36%
solve 16y² = 36 using the square root property
Answer:
2/3-3/2
Step-by-step explanation:
The sum of the firstnith term of series
is given by Sn = n2+ 5 n-6. Find the
general term (tn) and (+20)
Answer:
Tn = 2n+4
T20 = 44
Step-by-step explanation:
Given Sn = n²+ 5 n-6
Tn = Sn - Sn-1
Sn-1 = (n-1)² + 5(n-1) - 6
Tn = n²+ 5n-6 - ((n-1)² + 5(n-1) - 6))
Tn = n²+ 5n-6-(n²-2n+1+5n-5-6)
Tn = n²+ 5n-6-n²+2n-1-5n+5+6
Tn = 2n-7+11
Tn = 2n+4
Get the general term is 2n+4
To get the 20th term;
T20 = 2(20) + 4
T20 = 40+4
T20 = 44
Hence the 20th term of the sequence is 44
I really need help with these two, I'd really appreciate an answer as soon as possible. (Questions in picture below)
Answer:
2.$9.25 3.11
Step-by-step explanation:
For the first question virtually you could just go through each one and determine how they would fit. But what I did for both is determine the change in the first column (5 in #2 3 in #3) Then subtract the second change from the first in the second column (185-138.75 and 132-99) you come up with a rate of change like (46.25 and 33) then using that number dividing by the change from the first column (46.25/5=9.25 and 33/3=11) And to check applying all of that to the other changes.
In △ABC, AB = 13.2m, BC = 6.9m and ∠ACB = 90°. H lies on AC such that ∠BHC = 46°. Find (i) ∠ABH (ii) The length of AH
Answer:
(i) ∠ABH = 14.46⁰
(ii) The length of AH = 4.6 m
Step-by-step explanation:
From the image uploaded;
Consider △ABC;
the length of b is calculated by applying Pythagoras theorem as follows;
b² = c² - a²
b² = (13.2)² - (6.9)²
b² = 126.63
b = √126.63
b = 11.25 m
Also, ∠ABC is calculated as;
[tex]Cos \ B = \frac{a^2+c^2-b^2}{2ac} \\\\Cos \ B = \frac{(6.9)^2+(13.2)^2-(11.25)^2}{2(6.9 \times13.2)}\\\\ Cos \ B = \frac{95.288}{182.16} \\\\ Cos \ B = 0.5219 \\\\B = Cos ^{-1} (0.5231)\\\\B = 58.46 ^o[/tex]
Consider △CBH, ∠CBH is calculated as;
∠CBH = 90⁰ - 46⁰ = 44⁰
(i) ∠ABH will be calculated as;
∠ABH = θ
θ + 44⁰ = ∠ABC
θ + 44⁰ = 58.46⁰
θ = 58.46⁰ - 44⁰
θ = 14.46⁰
Thus, ∠ABH = 14.46⁰
(ii) The length of AH
length HC is calculated as;
[tex]tan \ 46^o =\frac{6.9}{HC} \\\\HC = \frac{6.9}{tan \ 46^o } \\\\HC = 6.66 \ m[/tex]
length of AH = CA - HC
x = b - HC
x = 11.25 - 6.66
x = 4.6 m
length of AH = 4.6 m
If an object on earth weighs 42 lbs, what is its weight on the moon?
Answer:
6.93 lbs.
Step-by-step explanation:
The weight on the moon is approximately 16.5% of what you would weigh on Earth. Using this information, we can say that 16.5% of 42 lbs would equal how much the object would weigh on the moon.
I prefer to convert percentages the decimal way, so let's do it that way. 16.5% is 0.165 as a decimal, so now all we have to do is multiply 0.165 by 42 (since we are saying 16.5% of 42 lbs), and we get 6.93 lbs.
Hope this helps! :)
A rectangular prism is 12 cm long, 6 cm wideand 5 cm high. What is the volume of the rectangular prism?
Inequ
What is the solution to the inequality -3.x + 7 > 1?
Х
DONE
Answer: x < 2
-3x + 7 > 1
<=> -3x > - 6
<=> x < -6/-3
<=> x < 2
Step-by-step explanation:
What is an equation of the line that passes through the points (-6,-3) and (-3,-5)
Answer:
y = - [tex]\frac{2}{3}[/tex] x - 7
Step-by-step explanation:
A( [tex]x_{1}[/tex] , [tex]y_{1}[/tex] ) , B( [tex]x_{2}[/tex] , [tex]y_{2}[/tex] )
y - [tex]y_{1}[/tex] = m( x - [tex]x_{1}[/tex] )
m = [tex]\frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex]
~~~~~~~~~~~~~
( - 6, - 3 )
( - 3, - 5 )
m = [tex]\frac{-5+3}{-3+6}[/tex] = - [tex]\frac{2}{3}[/tex]
y + 5 = - [tex]\frac{2}{3}[/tex] ( x + 3)
y + 5 = - [tex]\frac{2}{3}[/tex] x - 2
y = - [tex]\frac{2}{3}[/tex] x - 7
Somebody help!!! Please!!!
Answer:
y = -1 !!!!!!!!!!! :)))))))))))))
Answer:
y=-1
Step-by-step explanation:
symmetry is where it is the same on both sides, so that would be the line between the top and bottom point and because they are up and down it is a y whereas if it were side to side it would be x. it is on the left side which are negatives and it is one over to the left making it y=-1
Prove that Tan x + Cos x = 1 /Sin x .Cos x
Answer:
tanx + cotx = [tex]\frac{1}{sinxcosx}[/tex]
Step-by-step explanation:
Explanation
Take R.H.S = [tex]\frac{1}{sinxcosx}[/tex]
= [tex]\frac{sin^{2}x+cos^{2}x }{sinxcosx}[/tex]
= [tex]\frac{sin^{2}x }{sinx cosx} + \frac{cos^{2} x}{sinxcosx}[/tex]
= [tex]\frac{sinx}{cosx} + \frac{cosx}{sinx}[/tex]
= tanx + cotx
tanx + cotx = [tex]\frac{1}{sinxcosx}[/tex]
TWO MULTIPLE CHOICE QUESTIONS PLS HELP
Answer:
sorry i only know the number 2.
so the answer is the first one...
If g(x) = x2 + 2, find g(3). (2 points)
9
8
11
6
Answer:
The answer is 11
Step-by-step explanation:
so substitute 3 for x, then your equation would be 3^2 + 2
3^2 is 9
9 + 2 = 11
6. 5x + 3x + 38+5x-10 180
Answer:
38
Step-by-step explanation:
Simplifying
6 + -5x + -3x = 38
Combine like terms: -5x + -3x = -8x
6 + -8x = 38
Solving
6 + -8x = 38
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-6' to each side of the equation.
6 + -6 + -8x = 38 + -6
Combine like terms: 6 + -6 = 0
0 + -8x = 38 + -6
-8x = 38 + -6
Combine like terms: 38 + -6 = 32
-8x = 32
Divide each side by '-8'.
x = -4
Simplifying
x = -4
Answer:
I think the answer is 14.5x-132
Step-by-step explanation:
6.5x+3x+5x=14.5x
38+10-180=-132
=14.5x-132
Find the value of k, if x + 3 is a factor of 3x² + kx + 6. *
PLZZ HELP ME AND ONCE AGAIN THANK YOU
Answer:
2nd option
Step-by-step explanation:
the domain is from 0 to infinity
we count 0 because
f(0)=1 (just look in the graph)
so
[tex]x \geq 0[/tex]
which is the 2nd option
Plss answer!!
MERRY Christmas!!!
Critical Question. AAAAA
Answer:
Step-by-step explanation:
abc = 1
We have to prove that,
[tex]\frac{1}{1+a+b^{-1}}+\frac{1}{1+b+c^{-1}}+\frac{1}{1+c+a^{-1}}=1[/tex]
We take left hand side of the given equation and solve it,
[tex]\frac{1}{1+a+\frac{1}{b}}+\frac{1}{1+b+\frac{1}{c}}+\frac{1}{1+c+\frac{1}{a}}[/tex]
Since, abc = 1,
[tex]\frac{1}{c}=ab[/tex] and c = [tex]\frac{1}{ab}[/tex]
By substituting these values in the expression,
[tex]\frac{1}{1+a+\frac{1}{b}}+\frac{1}{1+b+\frac{1}{c}}+\frac{1}{1+c+\frac{1}{a}}=\frac{1}{1+a+\frac{1}{b}}+\frac{1}{1+b+ab}+\frac{1}{1+\frac{1}{ab}+\frac{1}{a}}[/tex]
[tex]=\frac{b}{b+ab+1}+\frac{1}{1+b+ab}+\frac{ab}{ab+1+b}[/tex]
[tex]=\frac{1+b+ab}{1+b+ab}[/tex]
[tex]=1[/tex]
Which equal to the right hand side of the equation.
Hence, [tex]\frac{1}{1+a+b^{-1}}+\frac{1}{1+b+c^{-1}}+\frac{1}{1+c+a^{-1}}=1[/tex]