Answers
Answer:
x = -1
y = 3
Step-by-step explanation:
Add the two equations together.
You get:
4x = -4
You may notice that there is no y, and that is because the y's cancel out. -y + y = 0, so there's no use in putting y in.
x = -1.
Plugging x in, we get:
-1 - 2y = -7.
Move the -7 over to the left side.
6 = 2y
Therefore, y = 3.
We can check our answer by plugging the values in.
3(-1) + 2(3) is supposed to equal 3.
-3 + 6 = 3, and so we know our answer is correct.
Answer:
x = -1
y = 3
Step-by-step explanation:
hope this helps
thanks for the points
mark me brainly
anddddd
sparkles and love
☆*: .｡. o(≧▽≦)o .｡.:*☆
Related Questions
if 3 candies cost 25 cents how much do 30 candies cost
Answers
Answer:
$2.50
Step-by-step explanation:
3=0.25 and 30=x
30 is 10 times more than 3 which makes the cost 10 times more than 0.25 = 2.50.
3*10=30
.25*10= 2.50
A motorboat, that has speed of 10 km hour in still water, left a pier traveling against the current of the river. Forty-five minutes after the boat left the pier, the motor of the boat broke, and the boat began drifting with the current. After three hours of drifting with the current, the boat was back at the pier where it had started. What is the speed of the current of the river?
Answers
9514 1404 393
Answer:
2 km/h
Step-by-step explanation:
distance = speed × time
The boat's progress upriver can be modeled by ...
(10 -c)(3/4) +(0 -c)(3) = 0
7.5 -3.75c = 0 . . . . simplify
2 -c = 0 . . . . . . . . . divide by 3.75
c = 2 . . . . . . add c
The speed of the current is 2 km per hour.
A chemist creates a solution that contains the following ingredients and quantities
5 cups of potassium
5 cups of water
10 cups of sodium
10 cups of magnesium
20 cups of Silver Oxide
How much Silver oxide water and potassium would be in 1 cup of the solution
Answers
it is 17
Step-by-step explanation:
ur wecom
Answer:
2/5 cups of silver oxide
1/10 cups of water
1/10 cups of potassium
Step-by-step explanation:
5+ 5 + 10 + 10+ 20 = 50
there are 50 total cups
now we must find the number to divide 50 by to get the 1 cup that we need
50 / 50 = 1
Now that we know what to divide by to get the quantities for 1 cup of solution, time to get the quantities
there are 20 cups of Silver oxide
20 / 50 = 2/5 cups
there are 5 cups of water
5 / 50 = 1/10 cups
there are 5 cups of potassium
5 / 50 = 1/10 cups
Frank the football fanatic is the best quarterback in the league. He's better than Quincy the no-quit quarterback, randy the ridiculous runner, and even darrell the daring dodger. (you get the point...he's good!) Last season he scored 179 touchdown. This season he scored 253 touchdown. What was the percent increase in the number of touchdown Frank scored? Round to the nearest percent.
A).41% C).43%
B).42% D).44%
Answers
help me please..........
Answers
Answer: (-3; -11)
Step-by-step explanation:
[tex]\left \bigg \{ {\big{y=7x+10} \atop\big {y=-4x-23}} \right.\\\\7x+10=-4x-23\\7x+10-10=-4x-23-10\\7x=-4x-33\\7x+4x=-4x-33+4x\\11x=-33\\11x \div 11=-33 \div 11\\x=-3\\\\y=7x+10\\y=7 \times (-3)+10=-21+10=-11[/tex]
4.132 ____ 4.192
>
=
Answers
Answer:
4.132 < 4.192Step-by-step explanation:
hope this helps.
The school band has 36 members, including 5 clarinets and 3 French horns.
What is the probability that a band member chosen at random will play the french horn?
A. 2/36
B. 1/36
C. 7/36
D. 2/5
E. 2/7
Answers
Answer:
A. 2/36
Step-by-step explanation:
For the following problem, you must first solve the problem, then write the inequality.
Ms. Stone wants to spend less than $80 on presents for her 2 brothers.
What is the most amount of money she can spend on each of them?
Answers
The most she can spend on each of them is 40
Which quadrant is the point (-3,5) located?
quadrant I
quadrant II
quadrant III
quadrant IV
Answers
Hope this helps
help me with this question please thx!!
Answers
Answer:
B
Step-by-step explanation:
the table represents the equation y= 35x
x = number of hours
Because Y=35x
Hope this helps
plz help
It took a boat 4 hours to travel downstream 120 miles. Upstream, the same trip took 6 hours. Find the rate of the current and the speed of the boat in still water.
Answers
Answer:
30 miles per hour downstream
20 miles per hour upstream
Step-by-step explanation:
divide 4 by 120 to get the rate downstream
divide 6 by 120 to get the rate upstream
Hope this helps :(
Stephanie earned 8 points for every book she read over the summer. The equation y = 8x represents Stephanie's points based on the number of books she read.
Use the table and equation to complete the statements and find the number of books Stephanie read.
1. Stephanie earned 72 points. Did she read fewer than 2 books, between 2 and 5 books, between 5 and 6 books, or more than 7 books? Explain how you know.
2. The equation y = 8x gives the points, y, earned by reading x books.
Use this equation to find the number of books Stephanie read to earn 72 points. Show your work.
(here are the tables)(plz answer both and dont be greedy as * and say i d k and get pts!)
Answers
Answer: multiply 8 on all x number of books read
Step-by-step explanation:
1 is 8 because 8 × 1 is 8
2 is 16 because 8 × 2 is 16
3 is 24 because 8 × 3 is 24
4 is 32 because 8 × 4 is 32
5 is 40 because 8 × 5 is 40
6 is 48 because 8 × 6 is 48
7 is 56 because 8 × 7 is 56
8 is 64 because 8 × 8 is 64
9 is 72 because 8 × 9 is 72
10 is 80 because 8 × 10 is 80
1. If Stephanie had read fewer than 2 books, she would have earned less than 16 points.
2. Stephanie read 9 books to earn 72 points.
What is an equation?The equation is defined as mathematical statements that have a minimum of two terms containing variables or numbers that are equal.
1. To determine the number of books Stephanie read, we can plug in the number of points she earned, which is 72, into the equation y = 8x and solve for x:
72 = 8x
Dividing both sides by 8, we get:
x = 9
So, Stephanie read 9 books to earn 72 points.
If Stephanie had read fewer than 2 books, she would have earned less than 16 points (since 8 points per book multiplied by 2 books is 16 points).
Similarly,
If Stephanie had read between 2 and 5 books, she would have earned between 16 and 40 points.
If Stephanie had read between 5 and 6 books, she would have earned between 40 and 48 points.
If Stephanie had read more than 7 books, she would have earned more than 56 points.
2. The given equation is as follows:
y = 8x
Substitute the value of y = 72 in the equation,
72 = 8x
Dividing both sides by 8, we get:
x = 9
Therefore, Stephanie read 9 books to earn 72 points.
Learn more about the equation here:
brainly.com/question/10413253
#SPJ2
yan and Kaine are two partners in a business. Ryan makes $3 in profits for every $4 Kaine makes. If Kaine makes $60 profit on the first item they sell, how much profit does Ryan make?
PLS HELP
Answers
Answer: 45
Step-by-step explanation: because 60/4 = 15 and 15 x 3 = 45, Ryan makes $45
I hope this helps
78 ÷ 8 is equivalent to 78.00 ÷ 8. We can write zeros in the tenths place and hundredths place without changing the value. Use the algorithm to solve.
Answers
Answer:
9.75
Step-by-step explanation:
Solve the equation.
x−5(x−1)=x−(2x−3)
exactly how u would do it on paper please
Answers
Answer:
brainlest plzz
2/3x
Step-by-step explanation:
Answer:
this is what I got
Step-by-step explanation:
hope this help
please give it as brainlyest answer and follow
plzzz
FIRST ANSWER GETS BRAINLIEST PLZ DONT PLAY AROUND
Answers
Answer:
3
Step-by-step explanation:
I WILL CHOOSE BRAINLIEST TO BEST ANSWER!!!! WORTH 100 POINTS!!!!!!
Answers
Answer:
its I my sister said
Step-by-step explanation:
What is the solution of the system of equations? (____,____)
Answers
Answer:
isk that one but i think its 0,5
Step-by-step explanation:
Answer:
the solution is (0,5) ... . ...
can some one help me with THIS??????
Answers
Answer:
65
Step-by-step explanation:
The first one is 25
The other one is 90
So
25+90+C=180
C=180-90-25=65
Hello everyone I hope your doing well, I'm having trouble with school at the moment. I have loads of assignments and I need to finish them today. I will have more of these so if anyone is willing to help with all of these please send me a email
Answers
Answer:
A is 55 ÷2=27.5? because 1 is 5 5 so to get 1/2 you will half the first one
HELP! I WILL GIVE BRAINY!!!
The graph shows a function. The equation that represents the function is y = x³ + 1.
Chose true or false for each statement.
A. Each input has exactly one output. T/F
B. The graph shows a nonlinear function. T/F
C. Some inputs have more than one output. T/F
D. The graph can be represented by the form y = mx + b. T/F
Answers
2 more i will give Brainliest
Answers
On interstate highways, the minimum allowable lane width is 12 feet. Write an inequality to show the possible width of a lane.
Answers
I dont know if this is what you need hope it helps
so we get to see the lane/ line
please help ........................................
Answers
Answer:
3.35 decimeters
Step-by-step explanation:
You just add 2.65+.7
The triangular sail has an area of 25 square feet. The sail's height is 10 feet. What is the length of the base of the sail? Hint: Remember that the area of 25 square feet is half of the rectangle. Don't forget units (feet) in your answer. I'LL MAKE FIRST GOOD ANSWER BRAINLIEST PLEASE HELP
Answers
Answer:
5 feet
Step-by-step explanation:
Given the speeds of each runner below, determine who runs the fastest.
Brooke runs 15 feet per second.
Liz runs 204 feet in 14 seconds.
Emily runs 1 mile in 406 seconds.
Frank runs 621 feet in 1 minute.
Answers
Answer:
Brooke runs the fastest.
Answer:
Brooke runs the fastest
Step-by-step explanation:
Hope this helped:)
Risky Retzlaff is cutting it close! She has 20 minutes to get to her destination and it is 25 miles away. She drives 3/5 miles in 10 minutes, and 1/6 in 5 minutes. How many miles does she have to drive in her last 5 minutes? really need help
Answers
Answer:y =
40 mi
Step-by-step explanation:
y = -.75(85) + 103.75
y = -63.75 + 103.75
y = 40 mi from home after 85 min
Select the correct points.
Identify the pair of points that can represent an increasing function that has a greater rate of change than that of the function
y=8/5x+3/5
Answers
Answer: Slope = 3.200/2.000 = 1.600
Geometric figure: Straight Line
Slope = 3.200/2.000 = 1.600
x-intercept = 3/8 = 0.37500
y-intercept = -3/5 = -0.6000
Step-by-step explanation: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
y-(8/5*x-3/5)=0
STEP
1
:
3
Simplify —
5
Equation at the end of step
1
:
8 3
y - ((— • x) - —) = 0
5 5
STEP
2
:
8
Simplify —
5
Equation at the end of step
2
:
8 3
y - ((— • x) - —) = 0
5 5
STEP
3
:
Adding fractions which have a common denominator :
3.1 Adding fractions which have a common denominator
Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:
8x - (3) 8x - 3
———————— = ——————
5 5
Equation at the end of step
3
:
(8x - 3)
y - ———————— = 0
5
STEP
4
:
Rewriting the whole as an Equivalent Fraction :
4.1 Subtracting a fraction from a whole
Rewrite the whole as a fraction using 5 as the denominator :
y y • 5
y = — = —————
1 5
Equivalent fraction : The fraction thus generated looks different but has the same value as the whole
Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator
Adding fractions that have a common denominator :
4.2 Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator
Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:
y • 5 - ((8x-3)) 5y - 8x + 3
———————————————— = ———————————
5 5
Equation at the end of step
4
:
5y - 8x + 3
——————————— = 0
5
STEP
5
:
When a fraction equals zero :
5.1 When a fraction equals zero ...
Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.
Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.
Here's how:
5y-8x+3
——————— • 5 = 0 • 5
5
Now, on the left hand side, the 5 cancels out the denominator, while, on the right hand side, zero times anything is still zero.
The equation now takes the shape :
5y-8x+3 = 0
Equation of a Straight Line
5.2 Solve 5y-8x+3 = 0
Tiger recognizes that we have here an equation of a straight line. Such an equation is usually written y=mx+b ("y=mx+c" in the UK).
"y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.
In this formula :
y tells us how far up the line goes
x tells us how far along
m is the Slope or Gradient i.e. how steep the line is
b is the Y-intercept i.e. where the line crosses the Y axis
The X and Y intercepts and the Slope are called the line properties. We shall now graph the line 5y-8x+3 = 0 and calculate its properties
Graph of a Straight Line :
Calculate the Y-Intercept :
Notice that when x = 0 the value of y is -3/5 so this line "cuts" the y axis at y=-0.60000
y-intercept = -3/5 = -0.60000
Calculate the X-Intercept :
When y = 0 the value of x is 3/8 Our line therefore "cuts" the x axis at x= 0.37500
x-intercept = 3/8 = 0.37500
Calculate the Slope :
Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is -0.600 and for x=2.000, the value of y is 2.600. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 2.600 - (-0.600) = 3.200 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / R
Find the sum.
start fraction 1 over 7 end fraction + two-fifths
A. one-fourth
B. start fraction 3 over 7 end fraction
C. The fraction states 14 over 35.
D. Start Fraction 19 over 35 End Fraction
Answers
the denominators need to be equal to add so 1/7 converts to 5/35 and 2/5 converts to 14/35
so 5/35 + 14/35 = 19/35
Can someone pls help mee
Answers
Answer:
Here is your answer