ANSWER THIS PLEASE WILL GIVE BRAINLEST
Answer:
i think it is 11%
Step-by-step explanation:
cause there is 11 of 20
Help ASAPP LIKE PLSSS SO FAST PLS
Answer:
0.44 and 44/100
Step-by-step explanation:
Old MacDonald had a farm. On this farm he had some cows and chickens. When he “took stock” (counted), the farmer had 15 animals and 44 legs. How many cows and chickens did Old MacDonald have?
Answer:
7 Cows and 8 Chickens
Step-by-step explanation:
Note that cows have four legs each and chickens have two legs each.
if there were only cows, then 15 cows times 4 legs for each cow would give 15 x 4 = 60 legs. 60 is greater than 44, so some (maybe all) of the animals are chickens.
If there were only chickens, then 15 chickens times 2 legs for each chicken would give 15 x 2 = 30 legs. 30 is less than 44, so we have confirmed that there is a mixture of both cows and chickens on the farm.
One approach would be to build a table of possibilities:
Total legs will equal number of cows times 4 plus number or chickens times 2 and we know the total number of animals is 15, so we keep cows plus chickens equal to 15 and just keep adding a cow and subtracting a chicken and do the math until.we get 44 legs. We know that it will take less than 13 tries, since we already ruled out 15 cows or 15 chickens. We'll start with 1 cow and 14 chickens and go from there
1 Cow + 14 Chickens = (1 x 4) + (14 x 2) = 4 + 28 = 32 legs
2 Cows + 13 Chickens = (2 x 4) + (13 x 2) = 8 + 26 = 34 legs
3 Cows + 12 Chickens = (3 x 4) + (12 x 2) = 12 + 24 = 36 legs
4 Cows + 11 Chickens = (4 x 4) + (11 x 2) = 16 + 22 = 38 legs
5 Cows + 10 Chickens = (5 x 4) + (10 x 2) = 20 + 20 = 40 legs
6 Cows + 9 Chickens = (6 x 4) + (9 x 2) = 24 + 18 = 42 legs
7 Cows + 8 Chickens = (7 x 4) + (8 x 2) = 28 + 16 = 44 legs
We can stop here because we can see that 7 Cows and 8 Chickens have a total of 44 legs.
Another way to approach this is to use algebra and to make is shorter to write we can assign a variable to each item and relate them in some way.
Let's use the letter x to stand for cows and the letter y to stand for chickens so we don't have to keep writing chickens and cows. x and y are just common letters to use, by the way, could use w and k perhaps since cow has a w and chicken has a k...sadly they both start with c, so we can't use that for both.
We know a couple different, but related, things.
One thing we know is that the total number of animals is 15. We can write that as:
x + y = 15
That means cows (x) plus chickens (y) equals 15.
A second thing we know is that the total number of legs is 44. We can write that as
4x + 2y = 44
That means 4 times x (cow) plus 2 times y (chicken) is equal to 44 since each cow has 4 legs and each chicken has 2 legs.
Since we now have two related equations and two variables we can solve for the variables.
If we take the first equation and rearrange it, by subtracting x from both sides, we can see that one way to do it is the following
y = 15 - x
That means the number of chickens (y) is equal to 15 minus the number of cows (x). As long as we do the same thing on both sides of the equals sign the equation is still.equal...you will see this again below.
Now we can then substitute 15 - x for y in the second equation and then all we have is x in that equation. (We can do this because y is equal to 15 minus x...they both have the same value and mean the same thing...they are equal to each other)
4x + 2(15 - x) = 44
As you can see, we now have 2 times 15 minus x where we had 2 times y before. If we multiply the 2 through we get because 2 times 15 is 30 and 2 times x is 2x
4x + 30 - 2x = 44
We can subtract the 2x from 4x and we get
2x + 30 = 44
Now we can subtract 30 from both sides of the equation because as long as we do the same thing on both sides of the equals sign the equality holds true
2x + 30 - 30 = 44 - 30
30 minus 30 is zero and 44 minus 30 is 14 so now we have
2x = 14
If we divide both sides by two, we still maintain the equality and we get x on one side as 2x divided by 2 is 1x or just x and we get 7 on the other side as 14 divided by 2 is 7
x = 7
That means we have 7 Cows as x represents cows, so half the problem solved
If we now go back to our first equation,
x + y = 15
We can replace x with 7 and get
7 + y = 15
We can subtract 7 from both sides and maintain the equality and isolate y
7 - 7 + y = 15 - 7
Again, 7 minus 7 is zero so we have isolated y and 15 minus 7 is 8
y = 8
This means we have 8 Chickens since y represents chickens
Once again we have shown that Old MacDonald has 7 Cows and 8 Chickens
The data gives the values of the 29 teams in the National Basketball Association, along with their operating incomes and revenues. Plots and correlations show that revenue predicts team value much better than does operating income. The least-squares regression line for predicting value from revenue is as follows: value = -123.298 + 4.242 revenue (a) What is the slope of this line?: 4.242 (b) The HORNETS are the NBA's most valuable team, valued at $547 million, with $147 million in revenue. Use the line to predict the value of the HORNETS from their revenue. What is the error in this prediction?: -123.298 + (4.242 * 147) = 500.276 547 - 500.278 = 46.724 (c) What is the correlation of revenue and value?: r = ?
Answer:
4.242;
$500.276 ; $46.724
Step-by-step explanation:
Given the regression equation :
value = -123.298 + 4.242 revenue
y = - 123.298 + 4.242x
y = team value ; x = Revenue
(a) What is the slope of this line?
From ;
y = mx + c
Where ; m = slope
Comparing the equation with, the model equation ;
mx = 4.242x ; Hence, slope, m = 4.242
(b) The HORNETS are the NBA's most valuable team, valued at $547 million, with $147 million in revenue. Use the line to predict the value of the HORNETS from their revenue.
Predicted value of hornets based on their revenue :
Revenue = $147,000,000
y = - 123.298 + 4.242(147)
y = - 123.298 + 623.574
y = 500.276
Predicted value is about $500.276 million.
What is the error in this prediction?:
Error = Actual - predicted value
Error = 547 - 500.276 = $46.724 million
Which of the following describes the transformation of p(x)=x3 to the function q(x)=−(x−6)3−4 ?
A.)p is reflected over the y-axis and then tranlated 6 units right and 4 units up.
B.)p is reflected over the x-axis and then translated 6 units left and 4 units up
C.)p is reflected over the y-axis and then translated 6 units left and 4 units down.
D.)p is reflected over the x-axis and then translated 6 units right and 4 units down.
Answer:
A
Step-by-step explanation:
(X) =x3 to the function q(x-6)3-4
The attachment im confused?
Answer:
? confused
Step-by-step explanation:
Answer:
Me too
Step-by-step explanation:
what is 20 xy -35xyz + 15x?
Answer:
5x(−7yz+4y+3)
Step-by-step explanation:
solve the equation with variables on the same side.
4b-2=6
Answer:
b = 2
Step-by-step explanation:
4b −2 = 6
First. Add 2 to both sides
4b −2 = 6
+2 +2
4b = 8
Second. Divide both sides by 4
4b/4 8/4
b = 2
Hope I helped!!
The surface area of a right circular cone is 20 cm. The radius of the base and the slant height are each multiplied by 5, enlarging the cone. What is the surface area of the new cone?
Answer: The answer is B. 50
Step-by-step explanation:
Answer:
its c
Step-by-step explanation:
i took the test
1
2
(x − 106) = 12 + 7x
Answer:
X=−10
Step-by-step explanation:
i hope this helps you ^_^
have a nice day/night
Equation/Question:
1/2(x-106)=12+7x
Answer/Steps to answer: (x= -10)
1. Simplify 1/2(x-106) to x-106/2.
x-106/2=12 + 7x
2. Multiply both sides by 2.
x−106=24+14x
3. Subtract x from both sides.
−106=24+14x−x
4. Simplify 24+14x-x to 24+13x.
-106=24+13x
5. Subtract 24 from both sides.
-106-24=13x
6. Simplify -106-24 to −130.
-130=13x
7. Divide both sides by 13.
130/13=x
8. Simplify 130/13 to 1010.
-10=x
9. Switch sides.
x=-10
-------------
Checking:
1/2(x−106)=12+7x
1. Let x=-10x=−10.1
1/2(−10−106)=12+7×−10
2. Simplify -10-106 to −116.
1/2×−116=12+7×−10
3. Move the negative sign to the left.
-116/2=12+7×−10
4. Simplify 116/2 to 58
−58=12+7×−10
5. Simplify 7×−10 to −70.
−58=12−70
6. Simplify 12-70 to −58.
−58=−58
Done by NeighborhoodDealer
The formula to convert degrees Fahrenheit degrees Celsius is C = (F - 32) Which formula can be used to convert degrees Celsius to degrees Fahrenheit?
Answer:
(°C×9/5)+32= 32°F is the answer
A party rental company has chairs and tables for rent. The total cost to rent 6 chairs and 2 tables is $24. The total cost to rent 3 chairs and 5 tables is $45. What is the cost to rent each chair and each table?
Step-by-step explanation:
6c+2t=24
3c+5t=45
8t=64
t=8
c=1.66
if you share 7 apples equally with three people then there are two and one thirds
Answer:
1.55555555
Step-by-step explanation:
7 - 2 1/3
4 2/3
4 2/3 /3
=1.5555555
HURRY ASAP IM ABT TO TURN THIS IN
Answer:
-1
Step-by-step explanation:
can anyone help me? plz if you let me know the answer that would be greatly appreciated
20 points to who ever answers first WITH WORK CITED!!!
Answer:
To find the area of a regular polygon, all you have to do is follow this simple formula: area = 1/2 x perimeter x apothem. Here is what it means: Perimeter = the sum of the lengths of all the sides. Apothem = a segment that joins the polygon's center to the midpoint of any side that is perpendicular to that side.
WILL MARK BRAINLIEST ONLY HAVE 10 MINUTES I ADD EXTRA POINTS
Answer:
2/1
Step-by-step explanation:
The left triangle is twice as large as the one on the right, so it would be 2/1.
Y varies directly as x If y= 90 and x =10 find y if x = 7
Answer:
Y = 63
Step-by-step explanation:
I think if x and y are proportional when y is 90 and x is 10 then that would mean that x multiplied by 9 would equal y so:
7 x 9 = 63
Write an equation for line m
Answer: i think it is (5,6) if it is wrong sorry
Don't for get to drop a heart
Step-by-step explanation:
1. Find the slope of the line using the points (10, 4) and (20, 0).
Answer:
10/-4 or 5/-2
Step-by-step explanation:
use y2-y1/x2-x1 equation.
A factory received a shipment of 19 bolts, and the vendor who sold the items knows there are 7 bolts in the shipment that are defective. Before the receiving foreman accepts the delivery, he samples the shipment, and if too many of the bolts in the sample are defective, he will refuse the shipment. For each of the following, give your responses as reduced fractions. If a sample of 7 bolts is selected, find the probability that all in the sample are defective. If a sample of 7 bolts is selected, find the probability that none in the sample are defective.
Answer:18
Step-by-step explanation: 19-7=12 bolts and 7+7=14 so 12-14=18
If a sample of 7 bolts is selected, then the probability that all in the sample are defective = [tex]\frac{7}{50388}[/tex]
If a sample of 7 bolts is selected, then the probability that none in the sample are defective = [tex]\frac{66}{4199}[/tex]
What is probability?"Probability is a branch of mathematics which deals with finding out the likelihood of the occurrence of an event."
Formula of the probability of an event A is:P(A) = n(A)/n(S)
where, n(A) is the number of favorable outcomes, n(S) is the total number of events in the sample space.
What is the formula for combination?[tex]^nC_r=\frac{n!}{r!(n-r)!}[/tex]
For given question,
Out of 19 bolts, 7 bolts are defective.
So 19 - 7 = 12 bolts are non-defective.
If sample of 7 bolts is selected.
The total number of ways of selecting 7 bolts from the 19 bolts.
Using combination formula,
[tex]^{19}C_7\\\\=\frac{19!}{7!(19-7)!} \\\\=50388[/tex]
Let event A: all bolts in the sample are defective
n(A) = 7
So the probability that all in the sample are defective would be,
[tex]P(A)=\frac{7}{50388}[/tex]
Let event B: no bolt in the sample are defective
This means the sample of 7 bolts has non-defective.
The total number of ways of selecting 7 bolts from the 12 non-defective bolts.
Using combination formula,
[tex]^{12}C_7\\=\frac{12!}{7!(12-7)!}\\\\ =792[/tex]
son n(B) = 792
So, the probability that none in the sample are defective would be,
[tex]P(B)=\frac{792}{50388} \\\\P(B)=\frac{66}{4199}[/tex]
Therefore, If a sample of 7 bolts is selected, then the probability that all bolts in the sample are defective = [tex]\frac{7}{50388}[/tex]
If a sample of 7 bolts is selected, then the probability that none in the sample are defective = [tex]\frac{66}{4199}[/tex]
Learn more about probability here:
brainly.com/question/11234923
#SPJ2
URGENT!!!!!! PLEASE ANSWER !!!!!!
7) Grace earns $18 per hour working as a math tutor. Write and solve an
inequality that can be used to find how many hours she must work in a week to
earn at least $378.
_6)
Answer:
The equation is 18h=378
h=21
Step-by-step explanation:
So first you have to set up the equation
so if she makes 18 dollars an hour the first part of the equation would be 18h
She made 378 dollars in one week so now the equation is 18h=378
The answer is h=21 because 378/18 is 21
Write an equivalent algebraic equation for the sentence below.
the quotient of x and 7 is eqyal to the difference of x and 4
Answer:
7x = x - 4 (or 6x = -4 if you want to simplify)
Step-by-step explanation:
I WILL GIVE BRAINLIEST PLS PLS PLS HELP ITS DUE TOMORROW PLS DO ALL FOR BRAINLIEST
Answer: Sorry but I don't know which one to do and can you move it too the left a little bit so I may see the whole sentence?
Step-by-step explanation:
help me please!!!!!!!1111
Which digit in the following number is the one that determines its precision?
10.846
Answer:
The precision is determined by the POSITION of the number 6 - NOT its value.
HELP!!! Problem solving with Angles! <3
Answer:
x= 41 degrees
Step-by-step explanation:
We know that 76+63+x= 180 degrees, so 139+x= 180
If you rearrange it, it becomes x= 180-139 or x= 41 degrees
Answer:
The answer is 41
Step-by-step explanation:
This a a supplementary angles that add up to 180°. Therefore, if we had this in the equation we get 180° ---> 76 + 63 + 41 =180
Brainliest?
Suppose that your boss must choose three employees in your office to attend a conference in Jamaica. Because all 27 of you want to go, he decides that the only fair way is to draw names out of a hat. What is the probability that you, Rebecca, and John are chosen
Answer:
1/2925 = 0.0003 = 0.03% probability that you, Rebecca, and John are chosen.
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
In this question, the order in which the people are chosen is not important, so the combinations formula is used to solve the question.
Combinations formula:
[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
Desired outcomes:
Only 1 outcome in which these 3 people are selected, so [tex]D = 1[/tex]
Total outcomes:
3 people from a set of 27, so
[tex]T = C_{27,3} = \frac{27!}{3!(27-3)!} = 2925[/tex]
Probability:
[tex]p = \frac{D}{T} = \frac{1}{2925} = 0.0003[/tex]
1/2925 = 0.0003 = 0.03% probability that you, Rebecca, and John are chosen.
I WILL GIVE 75 POINTS HELP!!!!
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Answer: I would help but im on a phone and the files wont work for me it says "cannot open file try again later"
Step-by-step explanation:
THINK SMARTER
Julie wants to make a drawing that is the size of
the original drawing. Sahil makes a drawing that is the size of the
original. A tree in the original drawing is 12 inches tall. What will be the
difference between the height of the tree in Julie's and Sahil's drawings?
Please help
Answer:
1 in
Step-by-step explanation:
We are given that
Height of tree in original drawing=12 in
Julie's drawing tree height=1/4 of original size
Sahil's drawing tree height=1/3 of original size
We have to find the difference between the height of the tree in Julie's and Sahil's drawings.
Height of tree in Julie's drawing=[tex]\frac{1}{4}\times 12[/tex]in
Height of tree in Julie's drawing=3 in
Height of tree in Sahil's drawing=[tex]\frac{1}{3}\times 12[/tex]in
Height of tree in Sahil's drawing=4 in
Difference between the height of the tree in Julie's and Sahil's drawings=4 in-3in
Difference between the height of the tree in Julie's and Sahil's drawings=1 in