Question:
A carpenter sands 1/2 of a dresser in 3/4 hour. At this rate, how long does it take the carpenter to sand 1 dresser?
Answer:
[tex]1\ dresser = \frac{3}{2} hour[/tex]
Step-by-step explanation:
Given
[tex]\frac{1}{2} dresser = \frac{3}{4} hour[/tex]
Required
How long will it take to sand 1 dresser
[tex]\frac{1}{2} dresser = \frac{3}{4} hour[/tex]
Multiply both sides by 2
[tex]2 * \frac{1}{2} dresser = \frac{3}{4} hour * 2[/tex]
[tex]1\ dresser = \frac{3}{4} hour * 2[/tex]
[tex]1\ dresser = \frac{3}{2} hour[/tex]
Hence;
It'll take 3/2 hour to sand 1 dresser
Answer:
Step-by-step explanation:
hey babe
Use area models to multiply
Answer:
195
Step-by-step explanation:
13*15=195
Use the Pythagorean Theorem to find the length of the leg in the triangle shown below. The figure shows a right triangle with one leg marked 20. The hypotenuse is marked 52.
Answer:
48
Step-by-step explanation:
The Pythagorean Theorem is:
[tex]a^2+b^2=c^2[/tex]
where [tex]a[/tex] and [tex]b[/tex] are the legs of the right triangle. [tex]c[/tex] is the hypotenuse of the triangle.
In this right triangle, we know that one leg is 20 and the hypotenuse is 52. Therefore,
[tex]a=20[/tex]
[tex]c=52[/tex]
Since we don't know the other leg, we can leave it as [tex]b[/tex]. Substitute the values into the theorem.
[tex]20^2+b^2=52^2[/tex]
Evaluate the exponents first.
⇒ 20²=20*20=400
⇒ 52²= 52*52= 2704
[tex]400+b^2=2704[/tex]
Since we want to find [tex]b[/tex], we must isolate [tex]b[/tex]. First, subtract 400 from both sides of the equation.
[tex]400-400+b^2=2704-400[/tex]
[tex]b^2=2704-400[/tex]
[tex]b^2=2304[/tex]
[tex]b[/tex] is being squared. The inverse of a square is a square root. Take the square root of both sides of the equation.
[tex]\sqrt{b^2}=\sqrt{2304}[/tex]
[tex]b=\sqrt{2304}[/tex]
[tex]b=48[/tex]
The length of the other leg is 48
Which expression is equivalent to -6 - ( 2)?
Answer:
-8
Step-by-step explanation:
A researcher performed an experiment with two groups. She found the difference of the means for each group. Then she combined the groups, chose two new groups, and found the difference between the means of those new groups. She repeated this process 200 times. The normal distribution of the difference in the means she found is given below. How great would the difference in means between the first two groups have to be in order to considered significant? -At least 7 -At least 8 -At least 9 -At least 10
Answer:
at least 10
Step-by-step explanation:
because i cant explain it.
Answer:
2 standard deviations above the mean is significant
Step-by-step explanation:
Add an apple orchard, small bags contain 7 apples. Alexa and her family bought 91 apples for a party. How many small bags did they buy? I need the problem solved out thanks
In this problem, we'll need to divide the number of apples by the amount of apples in a small bag. This will leave us with the number of small bags needed for the amount of apples.
91 / 7 = 13
Therefore, Alexa and her family bought 13 small bags of apples.
An equivalent fraction to 5/16 is
a. 5/32
b. 10/32
c.1/2
d. 10/16
Answer:
B is the answer..................
==================================================
Explanation:
Multiply top and bottom of the original fraction by 2
[tex]\frac{5}{16} = \frac{5*2}{16*2} = \frac{10}{32}[/tex]
Or you could go in reverse to divide each part of 10/32 by the GCF 2
[tex]\frac{10}{32} = \frac{10\div 2}{32\div 2} = \frac{5}{16}[/tex]
-------------------
Another alternative is to use your calculator to find the decimal version of each answer choice
5/32 = 0.15625
10/32 = 0.3125
1/2 = 0.5
10/16 = 0.625
And compare these results with 5/16 = 0.3125
Both 5/16 and 10/32 have the same decimal value 0.3125, which makes them equal.
Find the sum 46 +47 +48 +49+...+138 + 139.
Answer:
8695
Step-by-step explanation:
Took forever on calculator but I did it!
Answer:
8695
Step-by-step explanation:
There is a formula for adding all integers from 1 to some integer n.
[tex] 1 + 2 + 3 + ... + n = \dfrac{n(n + 1)}{2} [/tex]
In other words, to add all integers from 1 to an integer, multiply the integer by the next greater integer and divide by 2.
For example, what is
1 + 2 + 3 + 4 ?
Multiply 4 by the next integer, 5, and divide by 2.
(4 * 5)/2 = 20/2 = 10
Check: 1 + 2 + 3 + 4 = 3 + 3 + 4 = 6 + 4 = 10
We see that the formula works.
Now we need to apply that formula to this problem, but there's a little more to it.
If the problem were
1 + 2 + 3 + ... + 138 + 139, then we'd apply the formula and that would be it.
In this problem, though, we don't start the sum at 1. We start the sum at 46.
The trick here is to add all integers from 1 to 139, and then we subtract the sum of all integers from 1 to 45, so we are left with only the sum of the integers from 46 to 139.
Sum of integers from 1 to 139:
[tex] 1 + 2 + 3 + ... + 139 = \dfrac{139(139 + 1)}{2} = \dfrac{139(140)}{2} = 9730 [/tex]
Sum of integers from 1 to 45:
[tex] 1 + 2 + 3 + ... + 45 = \dfrac{45(45 + 1)}{2} = \dfrac{45(46)}{2} = 1035 [/tex]
Now we subtract the sum to 45 from the sum to 139.
46 + 47 + 48 + ... 138 + 139 = 9730 - 1035 = 8695
Answer: 8695
Imagine a spherical cell with a radius of 10 pm. What is the cells surface area in pm2? Its volume, in pm3? What is the ratio of surface area to volume for this cell? Now do the same calculations for a second cell, this one with a radius of 20 pm. Compare the surface-to-volume ratios of the two cells. How is this comparison significant to the functioning of cells? (Note. For a sphere of radius r, surface area = 4rcr2 and volume = rrr3. Remember that the value of it is 3.14.)
Answer:
comparing the two cells, we can see that the surface area to volume ratio gets smaller as the cell gets bigger, making it harder for optimum amount of material that is needed to sustain the cell to cross the cell membrane. If a cell should grow beyond a certain limit, enough material will not be able to cross the membrane to nourish the cellular volume.
Step-by-step explanation:
For the cell with radius r = 10 pm
The surface area is from the area of a sphere
Area A = [tex]4\pi r^{2}[/tex]
A= 4 x 3.14 x [tex]10^{2}[/tex] = 1256 pm^2
volume is calculated from the volume of a sphere
Volume V = [tex]\frac{4}{3}\pi r^3[/tex]
V = [tex]\frac{4}{3}[/tex] x 3.14 x [tex]10^{3}[/tex] = 4186.67 pm^3
Ratio of surface area to volume = 1256/4186.67 = 0.29
For the second cell with radius r = 20 pm
The surface area of the cell is
A = [tex]4\pi r^{2}[/tex] = 4 x 3.14 x [tex]20^2[/tex] = 5024 pm^2
Volume = [tex]\frac{4}{3}\pi r^3[/tex] = [tex]\frac{4}{3}[/tex] x 3.14 x [tex]20^{3}[/tex] = 33493.3 pm^3
Ratio of surface area to volume = 5024/33493.3 = 0.15
comparing the two cells, we can see that the surface area to volume ratio gets smaller as the cell gets bigger, making it harder for optimum amount of material that is needed to sustain the cell to cross the cell membrane. If a cell should grow beyond a certain limit, enough material will not be able to cross the membrane to nourish the cellular volume.
Part A
Is there a transformation that maps shape l onto shape ll?explain your answer.
Part B
Is there a transformation that maps shape l onto shape lll? Explain you answer.
Part C
Is there a transformation that maps shape l into shape lV? Explain your answer.
Part D
Is there a transformation that maps shape l onto shape V? Explain your answer.
(Plzzz someone help with this)
Answer:
Step-by-step explanation:
A). Yes. If we rotate shape I by 90° clockwise about the origin shape I will overlap shape II.
Coordinates of one point of figure I are A(-1, 3).
After rotation 90° clockwise,
(x, y) → (y, -x)
Following this rule,
A(-1, 3) → A'(3, 1)
It clearly states that figure I will overlap figure II.
B). No. because length of the quadrilateral I is different from the length of the quadrilateral given in figure III while width are same.
Both are different quadrilaterals.
C). Yes. If the figure I is reflected over x-axis, we get figure III.
D). Yes. By the translation of figure I by 3 units right and 4 units down we get image figure V.
Rule followed for the translation,
(x, y) → (x+3, y-4)
Resolve the vector into components. 1. A vector starting at the point Q = (4, 6) and ending at the point P = (1, 2).
2. A vector starting at the point P = (1, 2) and ending at the point Q = (4, 6).
Answer:
1. Horizontal component = -3 units
Vertical component = -4 units
2. Horizontal component = 3 units
Vertical component = 4 units
Step-by-step explanation:
If a vector M, starting at point A = (a, b) and ending at point B = (c, d) is given, then the vector can be resolved into x and y components as follows;
M = AB
Where;
AB = B - A
AB = (a, b) - (c, d)
AB = (a-c, b-d)
AB = (a-c)i + (b-d)k
Therefore, a-c and b-d are the x and y components of the vector M.
(1) Let the vector be M:
Starting point of M = Q = (4, 6)
Ending point of M = P = (1, 2)
So,
M = PQ
Where;
PQ = Q - P
PQ = (1,2) - (4,6)
PQ = (1-4, 2-6)
PQ = (-3, -4)
Therefore,
M = PQ = -3i - 4j
The x and y components of M are therefore, -3 and -4 respectively.
(2) Let the vector be M:
Starting point of M = P = (1, 2)
Ending point of M = Q = (4, 6)
So,
M = PQ
Where;
PQ = Q - P
PQ = (4,6) - (1,2)
PQ = (4-1, 6-2)
PQ = (3, 4)
Therefore,
M = PQ = 3i + 4j
The x and y components of M are therefore, 3 and 4 respectively.
Note: The x and y components are also called the horizontal and vertical components respectively.
If (a,-3) is a point in the graph of y=x^2+4 what is a?
Answer:
A would be 13
So the full point would be (13,-3)
Which of the following transformations will produce similar figures? Select all that apply. (-x, y) (x + 2, y - 5) (2x, 4y) ( 1/2x,1/2 y)
Step-by-step explanation:
there are no different answers they are all the same
Answer:
The answer is A,B, and D
Step-by-step explanation:
Hope this helps =)
X/3+1=7/15 WHAT IS THE ANSWER
Answer:
x=-8/5
Step-by-step explanation:
5x+15=7
5x=7-15
5x=-8 divide
-8/5
How long will it take to walk 6 km if your speed is 2.0 km/hr
Answer:
3 hrs
Step-by-step explanation:
6/2=3 so 3 hours
(3,4) in function notation
f(3) = 4 is the answer
The idea is that y = f(x) is the output while x is the input
A point like (3,4) has x = 3 and y = 4 pair up together
Solve the equation, P= n+k+m for n
Answer:
n = p-k-m
Step-by-step explanation:
You would just say, like k and m and 1 and 2. But instead of adding them you just bring the to the other side like
p = n+1+2
-1 -1
p-1 = n+2
-2 -2
p-1-2 = n
p-k-m-n
A student dropped a textbook from the top floor of his dorm and it fell according to the formula s(t) = −16t 2 + 8√t , where t is the time in seconds and s(t) is the distance in feet from the top of the building.What was the average speed of the fall? Use the fact that the pencil hit the ground in exactly 2.8 seconds. Round your answer to 2 decimal places.
Answer:
-29.61m/sStep-by-step explanation:
Given the distance of fall of the student in term of the time t expressed by the equation s(t) = −16t² + 8√t, to get the average speed of fall of the pencil after 2.8 secs, we will need to differentiate the given function first since Velocity is the change in distance of a body with respect to time i.e
V = d(s(t))/dt
s(t) = −16t² + 8t^1/2
V = -32t+1/2(8)t^(1/2 - 1)
V = -32t+4t^-1/2
The average speed of the fall Using the fact that the pencil hit the ground in exactly 2.8 seconds, will be gotten by substituting t = 2.8 into the resulting equation.
V = -32t+4(2.8)^-1/2
V = -32t+4/√2.8
V = -32+4/1.6733
V = -32+2.391
v = -29.61m/s
Hence the average speed of the fall is -29.61m/s
The average speed of the fall is -29.61m/s
Calculation of the average speed:[tex]V = d(s(t))\div dt\\\\s(t) = −16t^2 + 8t^{1/2}\\\\V = -32t+1/2(8)t^{(1/2 - 1)}\\\\V = -32t+4t^{-1/2}[/tex]
Now here t = 2.8 seconds
So,
[tex]V = d(s(t))\div dt\\\\s(t) = −16t^2 + 8t^{1/2}\\\\V = -32t+1/2(8)t^{(1/2 - 1)}\\\\V = -32t+4t^-1/2[/tex]
V = -32+2.391
v = -29.61m/s
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If 46 people can fit into 64 square teet. Which proportion should you use to estimate how many people are in a 600
square foot area?
Answer:
431.25 approximately 431
Step-by-step explanation:
one way of calculating it would be to get the measure per one person which would be equal to 46 / 64 = 0.7 people in one square feet
then multiply 0.7 by the total distance = 431.25 approximated to 431
Bea earned $11,700 commission for selling a house, calculated as 6/100 of the selling price. What was the selling price of the house?
Answer:
195,000
Step-by-step explanation:
11,700=6/100p
11,700* 100/6=100/6*6/100p
p=195,000
Carrie has $87 left in her bank account. If she writes a check for $99, what will Carrie’s balance be?
Answer:
[tex] -12 [/tex]
Step-by-step explanation:
You start with 87 dollars.
[tex] 87 [/tex]
You write a check for 99 dollars.
Writing a check means taking money out of the bank.
[tex] 87 - 99 [/tex]
[tex] -12 [/tex]
She will have -12 dollars.
She is in debt for 12 dollars.
She owes the bank 12 dollars.
Three quarters make up what fraction of a dollar?
Write an improper fraction and a mixed number for the shaded portion of the group of figures.
Answer:
I will do a random number
2/3=1 2/3
Step-by-step explanation:
And I think that is what u want
[tex]2\frac{1}{3}[/tex] is a mixed fraction and 7/3 is a improper fraction.
What is Fraction?A fraction represents a part of a whole.
We need to write a improper fraction and a mixed number for the shaded portion of the group of figures
Fractions are three types proper, improper and mixed fraction
A proper fraction is a fraction which has its numerator value less than the denominator.
A improper fraction is a fraction which has its numerator value greater than the denominator.
A fraction represented with its quotient and remainder is a mixed fraction.
[tex]2\frac{1}{3}[/tex] is a mixed fraction
7/3 is a improper fraction.
Hence, [tex]2\frac{1}{3}[/tex] is a mixed fraction and 7/3 is a improper fraction.
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solve the given triangles by finding the missing angle and other sides lengths.
Answer:
75+48+x=180
x=180-123
=57degree
side length=3+3+3=9
Given f(x) = 3x – 5, solve for x when f(x) = 1
The value of x when f(x) = 1 is x = 2.
What is a function?A relation between a collection of inputs and outputs is known as a function. A function is a connection between inputs in which each input is connected to precisely one output. Each function has a range, co-domain, and domain.
Given:
The function,
f(x) = 3x – 5.
Solving for x when f(x) = 1,
1 = 3x - 5
3x = 6
x = 2
Therefore, the value is x = 2.
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In one of your Political Science courses there are 51 Democrats, 47 republicans, and 2 independents. Of the 20 women in the class 16 are Democrats and 4 are Republicans. Round all answers to 1 decimal places. What percentage of the Democrats and Republicans students are Republican women? Among the women in the class, what is the percent of Republican? Among the Republicans in class, what is the percentage of women?
Answer:27
Step-by-step explanation:
Rtf
write the sentence as an equation
c equal the product of n and 177 reduced by 314
Answer:
c = 177n - 314
Step-by-step explanation:
c = 177n - 314
Which of these is not a factor you need to consider when choosing a bank?
a. The number of ATM machines
b. Branch locations
c. How often you need access to your money
d. The amount of money you paid in income taxes last year
Answer:
A, B, and C all deal directly with the bank. While D does not deal with your bank it is a personal finance question that would NOT change your banking. So the correct answer would be D
Step-by-step explanation:
The amount of money you paid in income taxes last year.
What do you mean by the bank?Bank, is an institution that deals in money and its substitutes and provides other money-related services. In its role as a financial intermediary, a bank accepts deposits and makes loans.
What are the types of banks?A bank is a financial institution licensed to receive deposits and make loans. Banks may also provide financial services such as wealth management, currency exchange, and safe deposit boxes. There are several different kinds of banks including retail banks, commercial or corporate banks, and investment banks.
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Help me please with this question
Answer:
C.
Step-by-step explanation:
His initial cost of the phone bill was $25.90, which is the constant. He is charge $0.18 for each text. So you will have to add the initial bill and costs of the texts to get final cost on the phone bill, which is $30.40.
The ratio of cars in a parking lot is 8 to 5 trucks. There are 25 trucks in the parking lot. How many total cars and trucks are in the parking lot?
Any one know how to do this my son need help !!!!
Answer: B) Profit per shirt goes from $10 to $15
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Explanation:
Focus on the two points (2,0) and (3,10). The slope of the line through these points is
m = (y2-y1)/(x2-x1)
m = (10-0)/(3-2)
m = 10
Meaning the profit per shirt for this line is $10 per shirt.
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Now move onto the other line. Focus on the points (9,40) and (11,70)
m = (y2-y1)/(x2-x1)
m = (70-40)/(11-9)
m = 15
The profit per shirt has gone up to $15 per shirt
Answer:
I would personally say that his profit per shirt increases
Step-by-step explanation:
- he only made 10 after selling 7 shirts : can't be (• #1)
- they tell you that it's a profit function: so can't be (• #3)
- he spent 25 after he hit 50: can't be (• #4)