Explain how to calculate this mentally
1. 15is the percentage of
30
2. 3 is what percentage of 12
3. Six is what percentage of 10
Answer:
1. 50℅
2. 25℅
3. 60℅
hope it helps.
Answer:
Below.
Step-by-step explanation:
1. Divide 15 by 30 which is 1/2.
Then multiply 1/2 by 100 = 50%.
2. 3/12 = 1/4
1/4 * 100 = 25%
3. 6/10 = 0.6
0.6 * 100 = 60%.
Your bedroom wall is 150 inches wide. You want to hang two posters, each 27 inches across, with an equal space between each poster and the wall edges.
How many inches of space should you leave between the wall edge and each poster?
Answer:
32
Step-by-step explanation:
let the space be x
x + 27 + x + 27 + x = 150
3x + 54 = 150
3x = 96
x= 32
Mrs. Claus makes a
delicious fruitcake that
serves 11 people. There are
14 fruitcakes on the table.
How many people will this
feed?
Answer:
14 or 11
Step-by-step explanation:
because 14 is more than 11 and the question asks how many people it feeds not how many people can it feed out the people there
Answer:
I Believe It Will Feed 154 People
Step-by-step explanation:
Because 1 Fruit Cake feeds 11 people so I did 11*14
She said a delicious FRUITCAKE that
serves 11 people. Then she said there are 14 FRUITCAKES.
Please Mark Brainliest!!!!
please help me asap
Answer:
2 5/18
Step-by-step explanation:
It's the last choice
Point R is at (3, 1.3) and Point T is at (3, 2.4) on a coordinate grid. The distance between the two points is ____. (Input numbers and decimal point only, such as 8.2.) (Please walk me through how you got your answer!)
Answer:
[tex] RT = 1.1 [/tex]
Step-by-step explanation:
Distance between R(3, 1.3) and T(3, 2.4):
[tex] RT = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} [/tex]
[tex] RT = \sqrt{(3 - 3)^2 + (2.4 - 1.3)^2} [/tex]
[tex] RT = \sqrt{(0)^2 + (1.1)^2} [/tex]
[tex] RT = \sqrt{0 + 1.21} = \sqrt{1.21} [/tex]
[tex] RT = 1.1 [/tex]
Pls help me and thank you if you help me out
Answer:
I think it would be C.
Step-by-step explanation:
One is positive Four is negative so is 1+(-4)
Find the equation for the line graph below
7= -10s-3 Solve the equation
Answer:
s = 1
Step-by-step explanation:
7 = -10s - 3
=> 7 + 3 = 10s
=> 10 = 10s
=> 10/10 = s
=> 1 = s
Answer: s= -1
Step-by-step explanation:
let m>0. match each inequality with its graph. Explain your reasoning.
Answer:
a. C
b. A
c. B
d. D
Step-by-step explanation:
[tex]a.\ \ \frac{x}{m} < -1 \Longleftrightarrow x < -m[/tex]
Then
The graph that represents the inequality is C.
[tex]b.\ \ \frac{x}{m} > 1 \Longleftrightarrow x > m[/tex]
Then
The graph that represents the inequality is A.
[tex]c.\ \ \frac{x}{m} < 1 \Longleftrightarrow x < m[/tex]
Then
The graph that represents the inequality is B
[tex]d.\ \ -\frac{x}{m} < 1 \Longleftrightarrow -x < m \Longleftrightarrow x > -m[/tex]
Then
The graph that represents the inequality is D.
ILL GIVE BRAINEST HELP PLEASEE IM FAILING
THERE ARE 4 QUESTIONSSSS!!!!!!
1.) Choice B
p= b+h+c
SA= bh + pl
p=15+20+25 = 60
SA= 15(20) + 60(30) = 2100
2.) Choice D
V= lwh
V= (40)(22)(23.5)
V= 20680
1 liter = 1000cm^3
1L = x
1000cm 20680
x= 20.7 liters
3.) Choice B
V= (1/3)a^2(h)
V= (1/3)9^2(6.5)
V= 175.5
4.) I don't know this
Work out the length of ab coordinate
The distance between points AB at A(2, 5) and B(2, 10) is 5 units
What is an equation?An equation is an expression that shows the relationship between two or more numbers and variables.
The distance between two points A(x₁, y₁) and B(x₂, y₂) on the coordinate plane is:
[tex]AB=\sqrt{(y_2-y_1)^2+(x_2-x_1)^2}[/tex]
Let us assume that AB has coordinate at A(2, 5) and B(2, 10), hence:
[tex]AB=\sqrt{(10-5)^2+(2-2)^2}=5\ units[/tex]
The distance between points AB at A(2, 5) and B(2, 10) is 5 units
Find out more on equation at: https://brainly.com/question/13763238
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Suppose that the weather forecast indicates a 10% chance that cold weather will reduce the citrus grower’s profit from $100,000 to $85,000 and a 10% chance that cold weather will reduce the profit to $75,000. Should the grower spend $5000 to protect the citrus fruit against the possible bad weather?
Answer:
We can think in this situation as:
There is 10% (or a probability equal to 0.1) where the citrus grower's profit will be reduced by $15,000
There is 10% (or a probability equal to 0.1) where the citrus grower's profit will be reduced by $25,000
And in the remaining 80% (or a probability equal to 0.8), the profit does not change.
Then the expected value for the total profit can be written as:
EV = $100,000 + ( 0.1*(-$15,000) + 0.1*(-$25,000) + 0.8*$0)
= $96,000
In the case where the citrus grower spends $5000 to protect the fruits against possible bad weather, there is a 100% that is profit will not change, but he must pay $5,000
Then his profit will be:
P = $100,000 - $5,000 = $95,000
So in this case, the profit is $1000 less than the expected profit in the prior case. So the scenario where he does not buy the protection has a larger expected profit, which may mean that is better to not buy it (in a straight mathematical point of view)
One also could think that the values are really close together, so buying the protection does not mean a big change, and increases the security
which formula represents a substance that contains covalent bonds 1) LiCl 2)CaCl2 3)K2O 4)CO2
Answer:
It is CO2 Number 4
Step-by-step explanation:
Answer:
Step-by-step explanation:
1. What value of x makes the equation 3x - 6 = 9 true?
Answer:
5
Step-by-step explanation:
this is basic algebra so it's important to understand this concept now. you need to combine like terms so 3x-6=9 becomes 3x=15 (you add the 6 to add like terms). You then divide the 3 from 3x on both sides to get x=5
The value of x makes the equation 3x - 6 = 9 true is: x = 5.
Here, we have,
given that,
the equation is: 3x - 6 = 9
so have,
3x-6=9
We need to combine like terms
=> 3x = 9 + 6
(we add the 6 to add like terms).
becomes, => 3x=15
we then divide the 3 from on both sides
=> 3x/3 = 15/3
we get
=> x=5
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2y − 7x + 4x2 + 3y + 7x
A 4x2 − 14x + 5y
B 4x2 − 14x
C 4x2 + 14x + 5y
D 4x2 + 5y
Answer:
5y + 8
Step-by-step explanation:
Enter the value for x that makes the equation 5 + 3x - 37 = 6x + 23 - 8x true.
Answer:
pretty sure the answer is 11
Answer:
x = 11
Step-by-step explanation:
5 + 3x - 37 = 6x + 23 - 8x
3x - 6x + 8x = 37 - 5 + 23
11x - 6x = 60 - 5
5x = 55
x = 55/5
x = 11
Thus, the value for x is 11
-TheUnknownScientist
Use the Distributive Property and mental math to find the product.
5(88) =
Answer:
440
Step-by-step explanation:
I learned with parenthesis if its like this 4(7)
It usually means to multiply
soo
88 times 5
=440
soo
88
The ratio of apples to strawberry's is 2:10 if there is 60 strawberry's how many apples are there
(4x3−12x2−5)−(−8x2+4x+3)=
find the difference
Answer:
4x³ - 4x² - 4x - 8
General Formulas and Concepts:
Pre-Algebra
Distributive PropertyAlgebra I
Combining Like TermsStep-by-step explanation:
Step 1: Define expression
(4x³ - 12x² - 5) - (-8x² + 4x + 3)
Step 2: Simplify
Distribute negative: 4x³ - 12x² - 5 + 8x² - 4x - 3Combine like terms (x²): 4x³ - 4x² - 5 - 4x - 3Combine like terms (Z): 4x³ - 4x² - 4x - 8What is 4,000 times 48?
The answer is 192,000
Answer:
yes 4000×48=192000
very clever....(dead serious)
39 decreased by a number p
Answer:
mm
Step-by-step explanation:
I don't know sooorryy
Solve the system by substitution.
-2y = x
7x+9y = -45
Answer:
9
Step-by-step explanation:
substitute the value
ANHL player's labor negotiating committee is to be selected from 8 player representatives from the Eastern Conference and 7 player representatives from the Western Conference. Find the probability of selecting 3 Eastern Conference representatives and 2 Western Conference representatives.
a. 1/ 3003
b. 1/3
c. 56/143
d. 140/429
Answer:
21 / 143
Step-by-step explanation:
Given that:
Number of Eastern conference reps = 8
Number of western conference rep = 7
Probability of selecting 3 from Eastern reps and 2 from western reps
Probability = required outcome / Total possible outcomes
Total possible outcomes:
selection to be made = 3+ 2 = 5
Total Number of players = 8 +7 = 15
Total possible outcomes
Using combination formula :
nCr = n! / (n-r)!r!
15C5 = 15! / 10!5! = (15 * 14 * 13 * 12 * 11) / (5*4'3*2*1) = 360360 / 120 = 3003
Total possible outcomes = 3003
Required outcome :
8C3 * 7C2
8C3 = 56 ; 7C2 = 21
8C3 * 7C2 = 56 * 21 = 1176
required outcome / Total possible outcomes
= 1176 / 3003
= 21 / 143
Using the hypergeometric distribution, it is found that the probability is:
c. 56/143
The players are selected from the sample without replacement, hence, the hypergeometric distribution is used.
Hypergeometric distribution:
[tex]P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}[/tex]
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
The parameters are:
x is the number of successes. N is the size of the population. n is the size of the sample. k is the total number of desired outcomes.In this problem:
There are 15 representatives, hence [tex]N = 15[/tex]8 are from the Eastern Conference, hence [tex]k = 8[/tex]Sample of 5, hence [tex]n = 5[/tex].The probability is P(X = 3), hence:
[tex]P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}[/tex]
[tex]P(X = 3) = h(3,15,5,8) = \frac{C_{8,3}C_{7,2}}{C_{15,5}} = 0.3916[/tex]
For which the equivalent fraction is option c.
A similar problem is given at https://brainly.com/question/24826394
Ed is a mid segment for this triangle solve for X
I will give a brainless if a kind human being could answer this problem and explain it this is due in 15 mins and I’m confused :(
I will give a Brainlist also :)
Answer:
Step-by-step explanation:
What you are being told is that 3x - 7 is twice as big as x. You can see that because ST (for example) is cut into 2 equal parts. So is UT (cut into two equal parts). So the parts of the Big Triangle (SUT) are twice as Big as the parts of the small triangle DET
So multiply x by 2
3x - 7 = 2x Add 7 to both sides
3x - 7 + 7 = 2x + 7
3x = 2x + 7 Subtract 2x from both sides
3x-2x = 7
x = 7
Approximately 54% of mathematics students do their homework on time. In a class of 250 students, what is the mean, variance, and standard deviation if we assume normality and use the normal distribution as an approximation of the binomial distribution?
A) Mean = 135 Variance = 62 Standard Deviation = 8B) Mean = 53 Variance = 62 Standard Deviation = 8C) Mean = 54 Variance = 8 Standard Deviation = 62D) Mean = 135 Variance = 8 Standard Deviation = 62
Answer:
A) Mean = 135 Variance = 62 Standard Deviation = 8
Step-by-step explanation:
Given that :
Proportion (p) = 54%
Sample size (n) = 250
Using Normal approximation :
Mean = np
Mean = 250 * 0.54 = 135
Variance = npq ; q = 1 - p = 1 - 0.54 = 0.46
Variance = (250 * 0.54 * 0.46) = 62.1 = 62
Standard deviation = √variance = √62.1
Standard deviation = 7.8803553 = 8
the part of width 4 metre is surrounded inside a Square Garden of length 60 m find the area of the path
Incomplete question. Repost the complete problem.
Evaluate the expression 6³
Answer:
6 to the power of 3 means your base number is 6 and the 3 is how many times you multiply 6 by itself (6×6×6). the answer is 216
help please with number 2 help please thank you
Answer:
He will save $300
Hope this helps
need help on this geometry problem! ASAP
Answer:
x=75
Step-by-step explanation:
[tex]We\ are\ given\ that:\\AD\ is\ the\ altitude\ of\ \triangle ABC\\Hence,\\ADC=90[As\ altitudes\ intersect\ the\ base\ side\ at\ 90]\\Hence,\\As\ ADC=(x+15)\ and\ ADC=90\\x+15=90\\x=90-15\\x=75[/tex]
This is only the value of x in terms of AD being an altitude, and is independent off the sides.
The Aluminum Association reports that the average American uses 56.8 pounds of aluminum in a year. A random sample of 51 households is monitored for one year to determine aluminum usage. If the population standard deviation of annual usage is 12.3 pounds, what is the probability that the sample mean will be more than 59 pounds _________.
a) 0.1003
b) 0.3997
c) 0.6003
d) 0.8997
e) 0.0003
Answer:
A: 0.1003
Step-by-step explanation:
We are given;
Population mean; μ = 56.8
Population size; n = 51
Population standard deviation; σ = 12.3
We want to find; P(x > 59)
We will use the z-score formula.
z = (x - μ)/(σ/√n)
z = (59 - 56.8)/(12.3/√51)
z = 1.28
From z-distribution table attached, we have; P(z < 1.28) = 0.8997
Thus;
P(z > 1.28) = 1 - 0.8997 = 0.1003