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i have no idea what you were trying to do and no its not correct.
easiest way is to do the elimination method but you could do substitution method if you wanted to


first find the lowest common variable for y spot in both equations that will be easy to eliminate we want to eliminate the y so we can solve for the x coordinate best would be
2(2x+3y=-27)
3(-3x+2y=23)
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now subtract the 2 equations
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divide by 13

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Dependent and Independent Events
The occurrence of some events may affect the probability of occurrence of others. For example, the complementary events A and A cannot occur simultaneously. If one took place the other is out of the game:
P(A|A) = 0
regardless of the probability P(A). (P(A|B) denotes the conditional probability of A assuming B.) We say that the event A is not independent of the event A (assuming P(A) ≠ 0 of couse.) And, in general, an event A is not independent of an event B iff P(A) ≠ P(A|B), i.e., if occurrence of B affects the probability of A. It may not be obvious right away, but the relationship "not independent" is symmetric: if A is not independent of B then also B is not independent of A. Formally,
if P(A) ≠ P(A|B) then P(B) ≠ P(B|A).
To see why that is so we invoke the defintion of conditional probability,
P(A|B) = P(A∩B) / P(B),
so that P(A) = P(A|B) implies P(A∩B) / P(B) = P(A), or
P(A∩B) = P(A) P(B),
which also may serve as the definition of independency of A from B. But the later relationship is symmetric! It implies
P(B) = P(A∩B)/P(A) = P(B|A),
which exactly means that B is independent of A. We see that two events A and B are either both dependent or independent one from the other. The symmetric definition of independency is this
(*) P(A∩B) = P(A) P(B).
Two events A and B are independent iff that condition holds. They are dependent otherwise.
It's a frequent misconception that the independency or dependency of two events relates to their having or not having an empty intersection. The case of A and its complement A supplies a clear example of two dependent events with empty intersection.
Another example was introduced in the discussion of conditional probabilities, where we considered the sets
Ω = {1, 2, 3, 4, 5, 6, 7, 8},
A = {1, 3, 5, 7},
B = {7, 8},
A+ = {1, 2, 3, 5, 7} and
A- = {3, 5, 7}.

We found that P(B) = 1/4 whilst
P(B|A+) = 1/5,
P(B|A) = 1/4,
P(B|A-) = 1/3.

What this says is that B and A are independent whereas B is dependent on both A+ and A-. (Note that B∩A+ = B∩A = B∩A- = {7}.)

Returning to the question of survival and life expectancy, AN is the event of a new-born reaching the age of N years. By the meaning of it, for N > M, AN⊂AM and therefore AN∩AM = AN. In particular this means that
P(AN∩AM) = P(AN)
so that P(AN∩AM) = P(AN)·P(AM) is equivalent to P(AN) = P(AN)·P(AM) which is only possible if P(AN) = 0 or P(AM) = 1. Since the latter is unrealistic and the former is unlikely for a reasonable age N, the two events AN and AM can't be independent. In fact, the probability of reaching a certain age grows with aging. As the time goes by, the size of the surviving population goes down while the number of person in a certain (advanced) age group is fixed. Thus the probability (which is the ratio of the two quantities) of getting into that group is indeed increasing with age.
in reference to: http://www.cut-the-knot.org/Probability/IndependentEvents.shtml

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60/2=30 dollars
200/4=50 dollars
50+30=80 dollars worth

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x doesnot equal 10
to prove it put 10 in place of x and solve
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incorrect
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correct

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SUBTRACT 4 from bothe sides
10-4=6

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F=first number S=second number

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this is not a math question we cant answer. this is your opinion and your understanding of the processes and what you've learned and how they apply.
im not writing short paragraphs for your homework
Q1 first question unreadable and doesnt make sence. last question your opinion. you can find the definitions in the book
Q2 HINT "IN YOUR OWN WORDS" make up your own problem and solve it. nothing i can do for you dont ask these type of questions as this would be called cheating on your homework.

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find common denom fastest is to just multiply the two denoms
20*16=320
16*7=112
20*3=60
add
reduce by 4 172/4=43 320/4=80

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i dont like fractions so first thing i do is multiply the denominators together
7y * 3 * 5 = 105y
now multiply everything by 105y



add 35y to both sides
divide by 56
reduce by 2

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so

simply multiply every thing by (x+4)

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incomplete question
u have a speed limit and asking distance?
according to your question the way its written its infinite kilometers.
,
are you trying to find out the same speed limit in kilometers?
speed btw requires some type of time variable seconds minuts hours...
if the speed limit is 55mph and you need to find the same speed limit in kph use the converson 1mile=1.609344kph
or use a converson calculator 55mph=88.51392kph
or paper pencil way with 55*1.609344kph=88.51392kph

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if
then

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y is always at 2 so no matter what x you have y will stay at 2
1,2
2,2
3,2
4,2
its a horizontal line at (0,2)
domain is what the x's are and range is what the y's are
y is always 2 so the range = {2}
x can be any numer negative or possitive so domain ={-infinity,infinity}

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ADD 6X to both sides
ADD 9 to both sides
DIVIDE by 7

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or simply cross cancel

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multiply denominators together 5*3*2=30 then multiply everything by that number

add like terms
subtract 20 and 3x from both sides
divide by 7

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.

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.

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this is a perimeter problem minus 1 top side, total(t) square inches
the top and bottom are l*w
the two long sides are h*l
the two short sides are h*w

since theres only the bottom we dont multiply by 2 for the lw sides

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7/9 , 9/11 , 11/13 , 13/15
so we know its between 13 and 15 dollars
it makes since that its adding a dollar more per rose
3 for 5 4 for 6 5 for 7 6 for 8 7for 9
so 11 for 13 , 12 for 14 , 13 for 15
12 for 14 dollars

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Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons: For these solutions to exist, the discriminant should not be a negative number. First, we need to compute the discriminant : . Discriminant d=56 is greater than zero. That means that there are two solutions: . Quadratic expression can be factored: Again, the answer is: 3.87082869338697, 0.129171306613029. Here's your graph:

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uh the largest triangle would be exactly half of the area of the rectangle by drawing the diagnal creating 2 90 degree triangles
fastest way is find area of rectangle and divide by 2
140/2=70

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well is the interest per month or year also is it compound interest or simple interest...without these variables its not possible to get the correct answer unless you want 4 answers to the question. please make sure the question has its specifics or its an incomplete question or ask for all 4 possibilities.
6%of 60000= 360 meaning total of 6360
so if its 6% a month its something like
pay the 50 first month
6360-50=6310 *.06=6688.6
6688.6-50=6638.6 shed never pay it off so i doubt this method
say just simple interes of 6% no per month or year.
6%of 60000= 360 meaning total of 6360
6360/50=127.2 months
.2*30=6 days
127/12=10.58
10years 7months 6days
the principle is simple 50*12months=600, 600*10years=6000, so 10 years for simple interest payback of the principle. another 7months and 6 days for the simple interest...idont know if this is the answer you arelooking for but good luck
either way i wouldnt lend someone 6 grand if they only paying me back 50 bucks a month or id charge compound interest atleast because of how long it takes them to pay it back but its just a question.

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look for squares
squares shown then seperate below
square root of a square canceles out
add like terms

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m=my age d=daughter age

im going to explain the above equation as its second nature for me but for some this may be hard to get this equation from words:
1) the is same as "5 years ago the sum of my age and my daughters age" and are the present ages so subtracting 5 years from each of them makes it 5 years ago
2) is same as "the average of the present ages of my daughter and my self" average is adding both ages and dividing them by the number of ages added
3) is same as "five times the average of the present ages of my daughter and my self" multiplying by 5
4) is same as "a third of five times the average of the present ages of my daughter and my self" multiplying by a third

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"my daughter will be 15 years old in 5years" so
who is tim?
dumb question we dont know who tim is and what tim's age is so its an incomplete question but if you wanted to find your age it is as follows.
substitute for
solve for
add like terms and distribute the and
multiply by and subtract from each side

.
check




correct

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there is no average theres only 1 definite solution =
average is where u take a set of numbers and then divide by how many numbers there are to get average number.

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well the f(x) doesnt apply
in this case