Answers
Answer:
x = -5, and y = -6
Step-by-step explanation:
Suppose that we have two equations:
A = B
and
C = D
combining the equations means that we will do:
First we multiply both whole equations by constants:
k*(A = B) ---> k*A = k*B
j*(C = D) ----> j*C = j*D
And then we "add" them:
k*A + j*C = k*B + j*D
Now we have the equations:
-x - y = 11
4*x - 5*y = 10
We want to add them in a given form that one of the variables cancels, so we can solve it for the other variable.
Then we can take the first equation:
-x - y = 11
and multiply both sides by 4.
4*(-x - y = 11)
Then we get:
4*(-x - y) = 4*11
-4*x - 4*y = 44
Now we have the two equations:
-4*x - 4*y = 44
4*x - 5*y = 10
(here we can think that we multiplied the second equation by 1, then we have k = 4, and j = 1)
If we add them, we get:
(-4*x - 4*y) + (4*x - 5*y) = 10 + 44
-4*x - 4*y + 4*x - 5*y = 54
-9*y = 54
So we combined the equations and now ended with an equation that is really easy to solve for y.
y = 54/-9 = -6
Now that we know the value of y, we can simply replace it in one of the two equations to get the value of x.
-x - y = 11
-x - (-6) = 11
-x + 6 = 11
-x = 11 -6 = 5
-x = 5
x = -5
Then:
x = -5, and y = -6
Related Questions
Which answer is correct?
9= 4 + 5 and 9 = 2 +7
9 = 5 + 5 and 9 = 6 + 4
9=6+3 and 9 = 7+1
9 = 5 + 3 and 9 = 6 +2
Answers
Answer:
9=4+5, 9=7+2, 9=6+3 are correct
Step-by-step explanation:
Someone please help meee
Answers
(1, -4)
You could just count the units
Find the value of x. 120
Answers
Answer:
x = 25
Step-by-step explanation:
2x + 70 = 120 {Subtract 70 from both sides}
2x = 120 -70
2x = 50 {divide both sides by 2}
x = 50/2
x = 25
Cuales son los valores
Answers
Answer:
Can you please translate this into English so I can help you?
Step-by-step explanation:
Help me please thank you
Answers
Distribute
(x-6)(x-7)
a) x^2-13x-15
b) x^2-13x+42
c) x^2+x+42
d) x^2+x-15
Answers
Answer:
B. x² - 13x + 42
Step-by-step explanation:
A restaurant bill came to food total of $50 you want to leave a 20% tip for the server how much is the total bill
Answers
Answer:
20 percent of 50 is 10
Step-by-step explanation:
I THINK THATS IT I DONT REALLY KNOWAnswer:
$50×.20=10 50+10=$60 the total is $60
Juan sells 3 oranges for every 2 apples. How many apples should Juan expect to sell
when Juan sells 15 oranges:
Answers
Answer:
10 apples
Step-by-step explanation:
We can write a ratio to solve
3 oranges 15 oranges
--------------- = -----------------
2 apples x apples
Using cross products
3x = 2 * 15
3x = 30
Divide by 3 on each side
3x/3 = 30/3
x = 10
Answer:
He can expect to sell 10 apples
help pleaseeeeeeeeeee
Answers
Answer:
I don't help ppl who just takes points from ppl with out helping :) Look at the past answers from her.
Step-by-step explanation:
Answer:
4, 7, 9, 12, 18, 32
Step-by-step explanation:
The sign shows that any number that is equal to, or more than, 36 is a valid answer. It can't be 3 because 3 x 9 is 27, and 27 is less than 36, so that wouldn't be true. 4 x 9 is 36, and 36 = 36, so that would be true, and obvoiusly all the other numbers that are over 4, when multiplied by 9, will equal more than 36, so they are all correct, except for the 3 and none answers. I hope this helps you out :)
Pls and thanks help me
Answers
A student solved the equation 2x+6=12 using algebra tiles. incorrectly says the solution is 9. Solve the equation. What mistake might the student have made? btw giving brainliest!
Answers
The diameter of a circle is 0.82 inches. What is the approximate area of the circle?
Answers
Answer:
.53
Step-by-step explanation:
your diameter is .82,so divide it by two to get your radius
.82 / 2 = .41
A = [tex]\pi[/tex] r ^2
A = [tex]\pi[/tex] .41 ^2
A = .53
Answer:
0.53
Step-by-step explanation:
Mr. Jackson orders lunches to be delivered to his workplace for himself and some coworkers. The cost of each lunch is $6.25. What expression could Mr. Jackson use to find the cost of ordering n lunches?
Answers
The question is incomplete, here is the complete question.
Mr. Jackson orders lunches to be delivered to his workplace for himself and some coworkers. The cost of each lunch is $6.25. There is also a one-time delivery fee of $3.50. What expression could Mr. Jackson use to find the cost of ordering n lunches
Answer:
6.25x + 3.50
Step-by-step explanation:
Mr. Jackon orders lunch for his coworkers and himself at the cost of $6.25
The delivery fee is $3.50
Therefore the expression that can be used to find the cost of ordering lunch is
n = 6.25(x) + 3.50
n= 6.25x + 3.50
Answer All 5 and I will give you brainliest
Answers
Answer: Number 1 is B Number 2 is D Number 3 is C Number 4 is D Number 5 is A
Step-by-step explanation:
What can be concluded about a
apply.
cylinder and a cone
cone with the same height and radius measures? Check all that
D The cone has the greater volume.
The cone and cylinder have the
same base area.
The volume of the cone is
3
the volume of the cylinder.
CD The cylinder can fit inside the cone.
The cone and cylinder have the same diameter.
Answers
Answer:
b c e
Step-by-step explanation:
Please help I need help
Answers
9514 1404 393
Answer:
(d) SA = 36π
Step-by-step explanation:
The surface area of a cylinder is ...
SA = 2πr(r +h)
Here, the radius is r=2 and the height is 7, so we have ...
SA = 2π(2)(2+7) = 36π . . . . matches choice D
__
Dimensions are in meters, so area is in square meters.
Find the area. Answer ASAP pls pls
Answers
Answer:
57.4
Step-by-step explanation:
3. Write an equation for the exponential function represented in the table and graph
below. Help please
X
у
-2
1.5
-1
3
0
6
1
12
2.
24
Answers
Answer:
The exponential equation is y = -2×(1/2)^x
Answer: what he said
Step-by-step explanation:
If x = 3 units, y = 6 units, and h = 5 units, find the area of the parallelogram shown above using decomposition.
Answers
Answer:
12 square units
Step-by-step explanation:
Hope it helps
model the decimal . then write percent and fraction equivalents .0.53
Answers
Decimal
Fraction
Percentage
0.53
53/100
53%
Help I need help I don’t know how to do this
Answers
8x²+2xy-20xy-5y²
2x(4x+y) -5y (4x+y)
= (2x-5y) (4x+y)
Write an equation that you can use to solve for x.
Enter your answer in the box.
Answers
Answer:x= 40
Step-by-step explanation:
x+80+60= 180 (angles on a straight line)
can someone help me with this question
Answers
Answer:
16
Step-by-step explanation:
which one is it help please
Answers
Find the equivalent of 2x^2 + (4x -6x^2) + 9 - (6x + 3)
A. -4x^2 - 2x +12
B.-4x^2 -2x + 6
C.-10x +6
D. 18x +12
Answers
Answer:
B.-4x^2-2x+6.
Step-by-step explanation:
=2x^2+4x-6x^2+9-6x-3.
=2x^2-6x^2+4x-6x+9-3.
=-4x^2-2x+6.
I need help plz help me !!
Answers
Answer:
110
Step-by-step explanation:
y = 11/6x where x is in minutes
there are 60 minutes in an hour
plug in 60 as x
11/6 *60 = 11*10 = 110
Answer:17
Step-by-step explanation:
Which is a better estimate for the volume of a paper cup?
A. 12 tablespoons
B. 12 gallons
Answers
PLEASE HELP ME ASAP I'LL GIVE BRAINLIEST
Answers
Answer:
Y = 6
Step-by-step explanation:
Rearrange terms
4+ =10
+ 4 = 10
Subtract 4 from both sides of the equation:
+ 4 =10
+ 4 −4 = 10 − 4
Simplify: Subtract Numbers:
Solutions is y= 6
rewrite the question in slope-intercept form:
2x-4y-12= -13-2x
Answers
Answer:
y= x + 1/4
Step-by-step explanation:
did the math and that should be your answer
please help me with this question!
Answers
You have to use SohCahToa to figure out the length of AB