3x+9y=12
-3x-6y=18
Solve the system by using elimination
Answers
Answer: (x, y) = (-26, 10)
This means x = -26 and y = 10 pair up together
===============================================================
How to get that answer:
Add the equations straight down. Think of having 3 separate columns for the three different like terms.
3x + (-3x) becomes 0x and that's just 0. So the x terms go away9y + (-6y) is the same as 9y-6y which turns into 3y12 + 18 becomes 30After all that, we're left with the simpler equation 3y = 30. That solves to y = 10 after dividing both sides by 3.
Plug this back into any equation involving x and y. Solve for x
3x+9y = 12
3x+9(10) = 12
3x+90 = 12
3x = 12-90
3x = -78
x = -78/3
x = -26
We have found that x = -26 and y = 10 pair up together to form the solution.
-------------------
Checking the answer:
Plug (x,y) = (-26, 10) into the first equation
3x+9y = 12
3(-26)+9(10) = 12
-78+90 = 12
12 = 12
We get a true equation since the same thing is on both sides.
Repeat the same idea for the second equation
-3x-6y = 18
-3(-26) - 6(10) = 18
78 - 60 = 18
18 = 18
The second equation is true as well.
Both equations are true, so the solution (x, y) = (-26, 10) is confirmed.
Answer:
-26, 10
Step-by-step explanation:
See the steps below:)
Related Questions
|4(x-3)|=15
PLS I NEED HELP ASAP
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Answer:
27/4 or negative 3/4
Step-by-step explanation:
no files i’ll report your answer
50 point answer
•
In the diagram below, lines TK and I are
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L
M
<
A. skew
B. parallel
C. perpendicular
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Answer:
C. PerpendicularStep-by-step explanation:
The lines are making 90° with each other.
JK ⊥ LM, the lines are perpendicularCorrect choice is C
G = { liquid, solid, gases} what type
of set is G.
a) Empty set
b) Firite set
c) Infinite set
d) Undefined set
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Answer:
Step-by-step explanation:
I think it’s b…
solve (√100 +√25). ASAP
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Answer:
Step-by-step explanation:
15
The ramp on the back of a moving van is 7 ft high and rises at an angle of 28°. How long is the ramp? Round to the nearest foot.
Answers
Answer:
6 feets
Step-by-step explanation:
Height of ramp = 7feets
θ = 28°
Length of ramp = x
Using trigonometric relation :
Sin θ = opposite / hypotenus
Sin 28 = 3 / x
0.4694715 = 3 / x
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x = 3 / 0.4694715
x = 6.39 feets
The length of the ramp = 6 feets
Which type of sampling method is being employed in the following example:
“A person is trying to decide between two different tablets. So, the person asks a
few customers standing at the technology counter in the department store if they
like the iPads or the Android based tablets."
Answers
Answer: Convenience sample
Step-by-step explanation: The person asks the fist people in the store she sees at the technology counter so it is not a random sample.
In the star below, all of the inscribed angles are congruent. Find the measure of each inscribed angle.
Answers
Answer:
36 degrees for each angle.
Step-by-step explanation:
If you divide 180 by 5 (for each point in the star) you get 36 degrees.
Write the equation of a line that is parallel to y=−5/4x+7
and that passes through the point (-4,1)
Answers
Answer:
y=-5/4x-4.
Step-by-step explanation:
parallel lines have to have the same slope so they don't intersect each other
original equation with the same slope and rewrite it using point slope form:
y-y1=-5/4(x-x1) now Substitute the point(-4,1)
y-1=-5/4(x-(-4))
y-1=-5/4(x+4)
Now we can distribute the -5/4 and add 1 to the right to get our final slope-intercept form:
y-1=-5/4x-5
y=-5/4x-4.
The parallel line of y=-5/4x+7 that passes through point (-4,1) is y=-5/4x-4.
Answer: y=-5/4x-4.
Step-by-step explanation:
divide this plzzzzzzzzzzzzz
13/3562
Answers
Answer: 0.0036496350364964
Step-by-step explanation:
If x = 4, what is the value of 4x + 3?
Answers
Answer:
19
Step-by-step explanation:
4(4)+3=19
answer or ill die from death
Answers
Answer:
y>-4
Step-by-step explanation:
Divide both sides by 2 and you get y>-4, which is B.
Answer:
y>−4 is the answer for y (djidjdejksekekek) [only for 20 characters sorry]
Michelle is giving a haircut and a permanent to another woman. The
total bill is $77. If the woman tips Michelle 15%, how much will the tip
be?
Answers
Answer:
$77 x 15/100 = $11.55
Step-by-step explanation:
15 percent of 77 dollars is 11.55
PLEASE HELP WILL MARK BRAINLIST
Find the length of YVU. Round to the nearest hundredth.
U
Y
V
85
1089
Z
X
W
XV = 24 meters
6.33
Answers
Step-by-step explanation:
m<UZV = 180-108=72°
arc YVU = 180+72+85= 337°
diameter XV = 24 m
so, the length of arc YVU =
337/360 × π × D
= 0.94 × 3.14 × 24 m
= 70.84 meters
Answer:
70.58
Step-by-step explanation:
just did it. other dude's decimals are wrong.
Tyler asks for a fish tank for his birthday. The task he wants is a rectangular prism 20 inches long, 10 inches wide, and 12 inches tall.
Answers
Answer:
2400 in^3
Step-by-step explanation:
Tyler asks for a fish tank for his birthday. The task he wants is a rectangular prism 20 inches long, 10 inches wide, and 12 inches tall. How much water will the fish tank hold?
the capacity of the tank can be determined by calculating the volume of the tank
volume of a prism = length x width x height
20 x 10 x 12 = 2400 in^3
help
In the Line Plot above, what number is the outlier in the data points?
Answers
What is the diameter of a hemisphere with a volume of 863 in3 to the nearest tenth
of an inch?
Answers
Answer:
Step-by-step explanation:
somehow i got 146.729521 inches...
Answer:127.5in
Step-by-step explanation:
use V=2/3(pi)r^2
863=2/3(pi)(r^2)
isolate the radius
then you get r=63.8
63.8*2= 127.5in
The question in the image
Please help
Answers
⋆⋆⋆⋆⋆⋆⋆⋆⋆⋆⋆⋆⋆⋆⋆⋆
MP= 2∠MQP= 2(44)=88°✄----------------
hope it helps...have a great day!!Isabel owns a T-shirt cart and has a contract with a local sports arena to distribute T-shirts outside the venue. Isabel is paid a flat rate of
$255 and a variable rate per T-shirt. The following table represents the total amount of money isabel makes. Let & denote the
number of T-shirts that Isabel sells and let y denote the amount of money that Isabel makes. What is the estimated amount of money
that Isabel makes if she sells six T-shirts?
T-shirts
0
1
2
3
4
Money
$255 $270 $289 $312 $339
Answers
Answer:
$355
Step-by-step explanation:
find the inverse of f(x)= 2x/(5x+6)
Answers
Answer:
[tex]f(x) = \frac{2x}{5y+6}[/tex]
Step-by-step explanation:
Answer:
Below!
Step-by-step explanation:
f(x) = 2x/5x+6
Sub y for f(x) : y = 2x/5x+6
Swap x and y : x = 2y/5y+6
Multiply both sides by 5y+6 : 2y = (5y + 6) x
Distribute x : 2y = 5xy + 6x
Change sign : 2y - 5xy = 6x
Factor out y : (2-5x)y = 6x
Divide both sides by 2-5x : y = 6x/2-5x
Substitute for y : f^-1(x) = 6x/2-5x
Answer: f^-1(x) = 6x/2-5x
That's the best I could do with my current math knowledge, I hope it makes sense :)
Selection two: solving two step equations (7 of 10) 20-n=48
Answers
Please Mark BRAINLIEST!
Stephanie just redecorated her bedroom. She wants to paint her door green but needs to know the surface area of the door to see if she has enough paint. What is the surface area of the door?\
PLS HELP ME
Answers
Answer:
Step-by-step explanation:
2(80*3)+2(3*200)+2(80*200)=33680cm
Find the sum: 11 + 15 + 19 + .......+ 83
Answers
Answer: i dunno what '.......' was suppose to mean but 11 + 15 + 19 + 83 = 128
Step-by-step explanation: b more specific dood -_-
The sum of the arithmetic series is:
893
What are arithmetic progressions?
An arithmetic sequence with a specific number of terms is the sum of all the terms in an arithmetic series.
An arithmetic sequence's first n terms are added together to form (n/2).(a1+an). The arithmetic series formula is what it is known as.
Solution:
Given:
a1 = 11, a2 = 15 and an=83
Step-1:
d= a2 ₋ a1
d= 4
Now, an = a ₊ (n ₋ 1)d
83 = a ₊ (n ₋ 1)4
83 = 11 ₊ 4n ₋4
83 = 7 ₊ 4n
4n = 83 ₋ 7
n = 19
Step-2:
Now, Sn = n/2 (a1 ₊ an)
Sn = 19/2 (11 ₊ 83)
Sn = 19/2 ₓ 94
Sn = 893
Hence we get the answer as 893
Learn more about "Arithmetic progressions" here-
brainly.com/question/6561461
#SPJ2
please help asap!!!!!!!!
Answers
Answer:
Step-by-step explanation:
x=-2, y=3,1 = 2, then
Answers
Answer:
anyone answer yet
Step-by-step explanation:
I am wondering also
Find the value of x need ASAP
Answers
Answer:
x=75°
Step-by-step explanation:
the triangle is an isosceles triangle (which you can tell since they show you that the two sides are congruent)
so this means that the base angles are congruent
so, x=75°
Marking brainliest!!
Was the KKK prominent people ?
Answers
Prominent definition; important/famous
They were definitely important and famous, just not in the best light ya feel me?
the mean of six numbers is 12.five of the numbers are 11,7,21,14 and 9.calculate the sixth number
Answers
Answer:
10
Step-by-step explanation:
hey lol pls help ;)
A) the angles are alternate exterior angles
B) the angles are interior angles
C) the angles are supplementary angles
D) the angles are vertical angles
Answers
write the first six cube of natural number
Answers
Answer:
1, 8, 27, 64, 125, 216, 343, 512, ... 1, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, ...
Step-by-step explanation:
Answer:
The cube of first six natural numbers are
1, 8, 27, 65, 125, 216
Step-by-step explanation:
Natural Numbers are known as 1, 2, 3, 4, ..., ∞
Now,
For Cube of first six natural numbers
1³ = 1
2³ = 8
3³ = 27
4³ = 64
5³ = 125
6³ = 216
Thus, The cube of first six natural numbers are
1, 8, 27, 65, 125, 216
-TheUnknownScientist
Entry function to model the situation. Then find the value of the function after the given amount of time. Use T as your variable and round you're answer to the nearest sent. Fiona salary is $21000, and she excepts to receive a 3% raise each year; 8 years. The function is y= Her salary after 8 years is $=
Answers
Answer:
her salary after 8 years is $26,602
Step-by-step explanation:
Given that
Fiona salary is $21,000
She received 3% raise each year
We need to find her salary after 8 years
So, here we apply the future value formula
i.e.
= Present value × (1 + rate of interest)^number of years
= $21,000 × (1 + 0.03)^8
= $21,000 × 1.03^8
= $26,602
hence, her salary after 8 years is $26,602