What is the solution to this system of linear equations?
y − 4x = 7
2y + 4x = 2
A. (3, 1)
B. (1, 3)
C. (3, −1)
D. (−1, 3)
I WILL MARK AS BRAINLIEST IF CORRECT!
Answer:
[tex]x = - 1[/tex]
[tex]y = 3[/tex]
Step-by-step explanation:
[tex]y - 4x = 7(eqn \: 1)[/tex]
[tex]2y + 4x = 2(eqn \: 2)[/tex]
[tex]solving \: by \: eliminating \: one \: variable[/tex]
[tex](y - 4x = 7)[/tex]
[tex] + (2y + 4x = 2)[/tex]
[tex]3y = 9[/tex]
[tex]y = 3[/tex]
[tex]y - 4x = 7[/tex]
[tex]3 - 4x = 7[/tex]
[tex] - 4x = 7 - 3[/tex]
[tex] \frac{ - 4x}{ - 4} = \frac{4}{ - 4} [/tex]
[tex]x = - 1[/tex]
The solution to this system of linear equations will be (–1, 3). Then the correct option is D.
What is the solution of the equation?The solution of the equation means the value of the unknown or variable.
The equations are given below.
y − 4x = 7 ...1
2y + 4x = 2 ...2
Add both equations, then we have
3y = 9
y = 3
Put y = 3 in equation 1, then we have
3 − 4x = 7
4x = –4
x = –1
The solution to this system of linear equations will be (–1, 3).
Then the correct option is D.
More about the solution of the equation link is given below.
https://brainly.com/question/545403
#SPJ2
Choose the linear equation written in slope intercept
form that matches each graph
Answer:B
Step-by-step explanation:the line touches the graph on the y axis at 3 so the y intercept has to be a positive 3. Then it goes up 1 over 3 each time. Meaning it’s Y=1/3X+3
You have 20 minutes to finish 10 math problems for homework. Write and solve an inequality that
represents how many minutes you can spend per problem.
HURRY PLEASE
Answer:
one min
Step-by-step explanation:
Answer: 2 minutes
20/10=2
PLZ HELP I WILL GIVE 20 POINTS WHOEVER ANSWERS FIRST:
Answer:
-2
Step-by-step explanation:
So to find slope you just subtract y^1 - y^2 and divide it by x^1 - x^2
The first point is (2, 1)
The second is (0, 5)
1 is our y^1 and 5 is our y^2
1 - 5 = -4
2 is our x^1 and 0 is our x^2
2 - 0 = 2
So our slope is -4/2, reduced its -2
I hope this helped, please mark Brainliest, thank you!
4x²-6xy
PLZ
HELP
I
GIVE
5
STARS
yep I get the same thing what the other person is right
Write 65% as a rate (fraction).
Answer:
65/100
Step-by-step explanation:
Answer:
65/100= 13/20
Step-by-step explanation:
divide by 5
While driving off the coast of Mexico, Jose dove below the surface 17 feet. He then swam up 6 feet. He saw a big shell, so he dove a another 8 feet down. He swims back up 4 feet to look at fish. What was the depths at which he finds the fish? A.-30, B.30, C.-15, D.-17
Answer: 15
Step-by-step explanation:
Bloome’s Flower Shop purchases vases by the caseload. Each case contains 24 vases. On average, 3 vases are usually cracked and cannot be used. At this rate, how many vases should be expected to be cracked if Bloome’s orders 216 vases?
Answer:
72
Step-by-step explanation:
What is the slope of the line?
Answer:
-3/4
Step-by-step explanation:
where the dot needa go ?
Answer:
where the green circle is where it goes
c+8+-20
c=
it made me write 20 characters
Which of the equations matches the line shown in the diagram?
A) y=-5/3x B) y=-5/3x-1 C) y=5/3x+1 D) y=5/3x-1/3
the correct answer it's equation D
Answer:
This is really easy: Its D) y=5/3x-1/3
Step-by-step explanation:
Brainliest to right answer.
Answer:
c=-5
Step-by-step explanation:
Answer:
c = -5
Step-by-step explanation:
This is the answer because:
1) We first have to isolate the variable by dividing each side by factors that don't contain the variable.
Hope this helps!
The Ride-It Store rents bicycles.The cost is $8.50 for 1 hour, $13.65 for 2 hours,$18.80 for 3 hours, and $23.95 for 4 hours.If the pattern continues, how much will it cost Nate to rent a bike for 6 hours?
Answer:
in six hours it would be $34.25
Step-by-step explanation:
The computation of the total cost for 6 hours is shown below:
For one hour it would be $8.50
For two hours
= $13.65 - $8.50
= $5.15
For three hours
= $18.80 - $13.65
= $5.15
For four hours
= $23.95 - $18.80
= $5.15
For five hours
= $23.95 + $5.15
= $29.10
For six hours
= $29.10 + $5.15
= $34.25
Hence, in six hours it would be $34.25
Write the equation of a line in slope intercept form that has a slope of -3 and passes through the point (0,7)
The Allied Taxi Company charges $2.50 to pick up a passenger and then adds $1.95 per mile. Isaac was charged $27.46 to go from one city to another. If x represents the
BIG POINTS IF YOU ANSWER CORRECTLY PLEASE ANSWER ASAP number of miles driven by the taxi, which linear equation can be used to solve this problem, and how many miles did Isaac travel, rounded to the nearest tenth?
1.95x + 2.50 = 27.46; Isaac traveled 15.4 miles.
1.95x + 2.50 = 27.46; Isaac traveled 12.8 miles.
2.50x + 1.95 = 27.46; Isaac traveled 11.8 miles.
2.50x + 1.95 = 27.46; Isaac traveled 10.2 miles.
Answer:
It should be the second one
Step-by-step explanation:
Answer:
The answer is - 1.95x + 2.50 = 27.46; Isaac traveled 12.8 miles.
Step-by-step explanation:
You are ordering planks of
wood that are 8' long each.
You need 15 pieces cut 3' long,
and 9 pieces cut 4' long. How
many planks of wood should
you order?
you need 10 8' planks of wood because 15x3= 45+9x4= 77, then 77÷8= 9.625, but you can't get .625 of a plank, so 10. hope you get a good grade!
Write the equation of the line that passes through the given points.
Answer:
y=3x-3
Step-by-step explanation:
the y(intercept)= -3 because the point is at -3 on the y-axis. from there the line goes up 3 and over 1. the slope would be 3.
All together the equation of the line is:
Y=3x-3
The coin jar was filled with pennies and nickels in the ratio of 7 to 2. If there were 28 nickels in the jar, how many coins were there?
Suppose that y is inversely proportional to the 4th power of x, and that y=15 when x=5. What is y when x=7? Round your answer to two decimal places if necessary.
Answer:
y = 3.91 when x =7
Step-by-step explanation:
y = k / x⁴
Where,
k = constant of proportionality
y=15 when x=5
y = k / x⁴
15 = k / 5⁴
Cross product
15 × 5⁴ = k
15 × 625 = k
9,375 = k
What is y when x=7?
y = k / x⁴
= 9,375 / 7⁴
= 9,375 / 2401
= 3.9046230737192
Approximately
y = 3.91
HELP PRETTY PLEASSSEEE
Answer: b.) 14
Step-by-step explanation:
Answer:
14
Step-by-step explanation:
The absolute value is always positive and 18-4 =14
the sum of three times a number x and nine"
Answer:
3x+9
Step-by-step explanation:
you are multiplying 3 and x because it says "three times a number x" which means 3x and you are adding it to 9 which is 3x+9.
If x = 14, which equation is true?
A.3 ( 20 − x ) = 44
B.3 ( 12 − x ) = 6
C.2 ( x − 3 ) = 22
D.2 x − 3 = 22
Answer:
C. 2 ( x − 3 ) = 22Step-by-step explanation:
if x = 14
2 ( x − 3 ) = 22
2 (14 - 3) = 22
2 (11) = 22
22 = 22
therefore, the answer is C.
-3v-2=-2-8v+5v How many solutions? Will mark brainlest
Answer:
infinite solutions
Step-by-step explanation:
-3v-2=-2-8v+5v
Combine like terms
-3v-2 = -2 -3v
Add 3v to each side
-3v-2+3v = -2 -3v+3v
-2 = -2
Since this is always a true statement, there are infinite solutions
Find the length of the arc on a circle with a radius of 7 centimeters and a central angle of 74 degrees
Answer:
Length of arc: 9.04cm
Step-by-step explanation:
Circumference = pi x diameter (or radius times 2 in this case)
C = pi x (7 x 2)
C = pi x 14
C is equal to around 43.98cm
In order to find the length of the arc, you use the central angle and turn it into a fraction, and then multiply that fraction by the circumference.
74 degree angle/ 360 degrees --> 74/360
74/360 x 43.98 = 9.04cm
umm i dont get none of this to be honest
The diagonal of a square is 15 inches. Find the area of the square.
Answer:
112.5in²
Step-by-step explanation:
Answer
[tex]225in^{2}[/tex]
Step-by-step explanation:
hope this helped :-)
HURRY ASAP HELP
Store A charges $1,200 for repairs with a 6 percent sales tax. Store B charges $1,350 with a 7 percent sales tax. Explain how you would determine the amount of money saved by using Store A instead of Store B?
Step-by-step explanation:
Store A:
6% of 1,200 is 72
72 + 1,200 = 1,272
Thus, store A has a total of 1,272
Store B:
7% of 1,350 is 94.5
94.5 + 1,350 = 1444.5
Thus, Store B has a total of 1444.5
1444.5 - 1,272 = 172.5
Thus, Store A is cheaper.
Answer:
sales tax- rate×original amount
A- 6/100(1200)=72
B- 7/100(1350)=94.5
First answer the problem 3,216 divided by 8 and ur quotiont/answer u then will look at the answer and find the first diget and then answer what place is that didet in.
Answer:
Quotient/Answer = 402
Hence the first digit is 4 and it's place value = hundreds
Step-by-step explanation:
Quotient = Dividend ÷ Divisor
Dividend = 3216
Divisor = 8
Quotient = 3216 ÷ 8
= 402
We are asked to find the place value of the first digit
Hence the first digit is 4 and it's place value = hundreds
Anyone in 10th grade geometry I could really use a partner to help me with it please?! :)
Answer:
I can help
Step-by-step explanation:
I'm in honors classes