Answer: F
Step-by-step explanation:
3. Given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solution. Show why this is true by solving the system of equations given. Justify the reason for each step. HINT: Use the addition property of equality and multiplication property of equality in your answers. (8 points: 1 point for each question)
5x + 2y = 7
3x – y = 2
To solve the system using elimination, first multiply the bottom equation by 2. Write the new system of equations. (1 point)
Why is this multiplication allowed? (1 point)
What variable will be eliminated when the equations are combined after
the multiplication? (1 point)
Next, add the equations together. Your answer should be a single equation with one variable. (1 point)
Why can you add the equations? (1 point)
Solve the equation for x. (1 point)
Substitute x back into one of the equations to solve for y. (1 point)
What is the solution to the system of equations? (1 point)
Answer:
Step-by-step explanation:
To solve the system using elimination, first multiply the bottom equation by 2. Write the new system of equations. (1 point)
5x + 2y = 7
6x –2y = 4
Why is this multiplication allowed? (1 point)
Because the entire equation was multiplied by the same number, the equation remains the same.
What variable will be eliminated when the equations are combined after the multiplication? (1 point)
The Y variable
Next, add the equations together. Your answer should be a single equation with one variable. (1 point)
11x = 11
Solve the equation for x. (1 point)
X = 1
What is the solution to the system of equations? (1 point)
X = 1 and Y = 1 so the answer is (1, 1)
(If you solve this again, but eliminate the X variable, you will still receive that answer 1, so Y = 1)
Sorry my first answer was wrong
8 2/9 - 2 2/3
NO LINKS OR ABSURD, OUT OF CONTEXT ANSWERS, THANK YOU.
Answer: 5 5/9
Step-by-step explanation:
try it
Morgan has an 8 1/2 foot board that must be cut into boards that are feet long. How many of the smaller boards can he get from the 8 1/2 foot board?
Which of the following equations could you use to solve the problem?
x * 8 1/2 = 5/6
8 1/2 * x = 5/6
5/6 * 8 1/2 = x
8 1/2 / 5/6 = x
Answer:
8 1/2 / 5/6 = xStep-by-step explanation:
8 1/2 foot board to be cut into 5/6 feet boards.
Number of smaller boards is:
8 1/2 ÷ 5/6 = 17/2 ÷ 5/6 = 17/2 × 6/5 = 51 / 5 = 10 (the whole part)Correct equation is D
Evaluate 6 m plus 1 for m equals negative 2. NO LINKS
Answer:
-11
Step-by-step explanation:
first substitute m for -2. now the equation is 6(-2)+1. next multiply 6 by -2 and you get -12. now add 1 to -12 and you get -11
I would appreciate this a lot if someone could help me with this.
Answer:
Question no. 2 answer is A 100percent confrom
Because of demand, concert tickets that normally sell for 89.99 each are marked up 20%, If Mark wishes to purchase 8 tickets, how much will he pay in total?
20 points will be given
Answer:$863.92
Step-by-step explanation:20% of 89.99 is 18
89.99x8=719.92
18×8=144
719.92+144=
863.92
Answer:
he will pay 864 dollars in total
Step-by-step explanation:
first we have to find 20% of 90 (i just rounded 89.99 to 90).
20% = 1/5, and 1/5 in decimal form is 0.20. (you can find the decimal value by multiplying the numerator and denominator by 10/10 and then simplifying it)
0.20 * 90 is 18, so we then add that to 90 making 108.
next, since Mark is buying 8 tickets, we multiply 108 by 8, giving us 864
therefore, 864 is our final answer
Someone help me with this please, I really need help and its due tmrw...PLEASE
Answer:
The number of hours a student should spend on their homework to expect a 94 on the quiz.
HELPPPPPPP!!!! I NEED ANSWER QUICK!!!!
Answer:
x=8
Step-by-step explanation:
2(2x+7)=46
2x+7=46/2=23
2x=23-7=16
x=16/2=8
Answer:
x = 8.9
2(2x+7)=46
4x+14=46
4x=35
x=8.9
If anyone can figure the answer, please tell me. Anything would be helpful :)
I have to master 20 lessons for khan all 100% and it's very difficult for some of them.
5(20 + ) = 100 + 95 im tryna watch anime but i gotta do another test
Answer:
100=195
Step-by-step explanation:
Im sorry it sort of makes no sense since because of the +.
Which equation is shown in the graph?
Best answer gets brainliest!
Answer:
C) y=x^2+x-6
Step-by-step explanation:
Looking at the first picture, the equation is way too high, thus A is incorrect
Looking at the second picture, the equation is also too high, thus B is incorrect
Looking at the third picture, the equation is at the graph, thus C is correct
Looking at the fourth picture, the equation is more at the right than at the left thus the equation is incorrect
Hope this helps!
ive found 2 i just need one more but if you can list everything it can be great
PLEASE ANSWER BOTH QUESTIONS. Use Graph to help answer them. NO LINKS.
Need answer fast, for this st*pid IXL question:( 10 points! Hurry please! I have 10 more questions left to get to 100%!!!!
poor ixl 78+78 i think because it had 78 and she drove 78
PLS HELP URGENT WILL GIVE 25 POINTS AND Brainliest
Answer:
Ok
Step-by-step explanation:
D.
C.
B.
:)
ok
can u pls brainlyest me
i have alot of work to do so this would make me go faster if u help me with this question In the picture
Bruce walks 3/4 mile in 1/5 hour. What is his speed in miles per hour? (label your answer mph) * worth 25 points and brainlyiest pls no links or deleting this Ty
Michael consumes a 16-ounce bag of potato chips and 12-ounce bag of pretzels every day after school. How many more ounces of potato chips than pretzels will Michael have eaten at the end of a 5 day school week?
A.
20 ounces
B.
80 ounces
C.
60 ounces
D.
28 ounces
Every day, Michael consumes 4 more ounces than the pretzels. Multiply 5 by 4 to recieve the answer:
4 x 5 = 20
So the answer is A.
Please help me with this answer!
Answer:
y=7/4x
Step-by-step explanation:
The manager of a local automobile store wants to conduct a customer satisfaction survey. Who should the manager survey to best find out what he wants to know?
Answer:
the customers
Step-by-step explanation:
because they are the main target of this survey
Sergio claims that StartFraction 20 Over 20 EndFraction = 1 percent. Which statement is true regarding his claim?
Answer: You dont give the statement. But 20/20 is 100% if that helps!
Step-by-step explanation:
Mr. DaCosta and his workers are tiling a bathroom wall using square-inch tiles. The area of the wall is 6,048 square inches. There are 72 rows of tiles.
How many tiles are in each row?
A.
85
B.
84
C.
840
D.
805
Answer: B.84
Step-by-step explanation:
1) Substitute the given information into the equation Area= length * width
2) 6,048 = 72 * x
3) Divide by 72 to find x
6,048/72 = 84
4) The answer is 84 tiles in each row
A circle has a radius of 15 centimeters and an area of 225π cm2. If the radius is multiplied by 3, what is the area of the new circle?
The camp has an elevation of 2700m. It is 1500m east of the origin. What are the camp's x and y coordinates?
Please help!! will give brainliest. Will be helpful
Solve 3(x−13)=y−2 for y. Then tell whether x and y show direct variation. Please help me with this. 60 points!
Answer: if you put 60 points onto the question it divides it by 2 for 2 different question get half of what it is so if you want each person to get 60 you need to add 120 points
Step-by-stepStep-by-step explanation:
Answer:
y=3x+13
Step-by-step explanation:
Sam’s discount shoes is have a 40 percent off sale. A — use the percent ruler at right to find how much Lorna will save on her purchase of 80 dollar professional basketball shoes. B What will she pay for the shoes?
Answer:
A, 32
B, 48
Step-by-step explanation:
Since the discount is 40% off, she will save 40% of the 80 dollar shoes, which is 40% of 80 dollars. 40 * 80 = 3200, and 3200/100 = 32 dollars worth of savings. She will pay a total of 80 dollars minus the 32 dollar discount to get a total of 48 dollar payment.
Answer:
40% off that means her shoes will be 60% of the value so 80* 0.6 or 60% = $48 she will pay and 32 she will save
Solve for b.
b - 7 = -20
A. b = -27
B. b = -13
C. b = 13
D. b = 27
Answer:
B. b = -13
Step-by-step explanation:
b - 7 = -20
move variables and numbers to different sides of the equal sign by adding 7 to both sides
b - 7 + 7 = -20 + 7
b = -13
Does anyone know this cause I'm kinda confused
It wasn't all that bad. The snowmobile only needed towing out. From that incident, she owes them $42. How much is her total debt to her parents?
Select all the fractions that are equivalent to 4.05¯¯¯¯¯.
405/99
401/99
81/33
802/198
405/100 (can only give 2 answers, so yea...)