1. 7x-4y= -8 and x+2y= 14 solution as (x,y) pls help!!
Answers
Answer:
(2 2/9, 12 5/9)
Step-by-step explanation:
multiply both sides of x+2y=14 by 2: 2x+4y=28
Add 7x-4y=-8 and 2x+4y=28: 9x=20
x=20/9
Plug in 20/9 into x+2y=14: 20/9+2y=14
2y=11 7/9
y= 11 14/9
y= 12 5/9
Answer:
29,-14
Step-by-step explanation:
Related Questions
There are 22 students in the class. Make two groups such that the first group has 8 students less than the second one.
Answer should look like:
The numbers of students in groups are ___ and ___ .
Answers
Answer: The number of students in groups are 7 and 15
Step-by-step explanation:
7+15=22
15-7=8
Use the Distributive Property to simplify the expression. -4(x + 3)
Answers
The answer simplified is
-4x-12
I NEED HELP IMMEDIATELY I WILL MAKE IT BRAINLIEST, GIVE 5 STARS, AND THANK YOU.
Mr.Brown has $410,000 in a retirement account that earns 3.85% interest each year. Find the amount earned each year by his investment.
Answers
Answer:
425,785
Step-by-step explanation:
Turn the percent into a decimal now:
3.85 ( i believe )
Then it would have become as:
0.0385.
Multiply 410,000 x 0.0385 and you could add ur answer ( as well )
Which will give you to:
425,785
Sorry for not putting step-by-step I was thinking about the brainlliest
First person right....
1. A survey asked 200 Grade 4 students about their reading preferences. Based on Graph #1, about how many of them would you expect to prefer comic books?
A. 10
B. 20
C. 70
D. 80
E. 100
2. About how many students do not prefer non-fiction?
A. 60
B. 75
C. 100
D. 150
E. 180
3. Overall, about how many students prefer literature (poems, plays, or novels)?
A. 45
B. 90
C. 100
D. 130
E. 180
Graph #2: Membership in School Clubs
4. At Rory’s school, students must join one after-school club. Based on the data in Graph #2, which club attracted about 30% of students?
A. yearbook
B. art
C. drama
D. hiking
E. running
F. science
5. Approximately What percent of students chose not to join the yearbook club?
A. 15%
B. 30%
C. 75%
D. 85%
E. 90%
6. About what percent of students joined the art club?
A. 30%
B. 25%
C. 20%
D. 15%
E. 5%
Answers
Answer:
1. A
2.150
3.c
4. d
5.im not sure
6. B
Step-by-step explanation:
Help me please! It’s due in like 10 minutes and I’m barely on the 8th question !!!
Answers
Answer:A
Step-by-step explanation:campbella helped
Answer:
A
Step-by-step explanation:
6(5-3x) -5(3x+2)
multiply each expression by the number outside the bracket
6×5=30,6×-3x=-18x -5×3x=-15x,-5×+2=-10
30-18x-15x-10
group the like terms
30-10-18x-15x
20-33x
Please help me give me the explanations of them not just the answer and yes I’m giving 24 points
Answers
Answer:
well the middle on is 3
Step-by-step explanation:
First questions answer is:
23.4 - 8.78 = 14.62
you subract 23.4 by 8.78. Since the number 23.4 is bigger than 8.78, the answer is not negative.
how you subtract the two numbers are you line up the decimal points, and then add a 0 next to the 4 in the term 23.4, and just subtract the two terms, 8.78.
Second question answer is:
4
if you add 2+4 you get 6.
Third question answer is:
$110
you add 47.91 + 23.96 + 35.09 and you get 106.96, which is closest to 110, so She spent about $110
Hope this helped, if I'm wrong on anything, feel free to correct me
Two fifths of the 40 students earned an A, what percent of the students earned an A
Answers
Answer:
40%
Step-by-step explanation:
2/5 = 0.4 or 40% (2 x 2 = 4, 5 x 5 = 10)
Therefore 40% of the students earned an A.
What does this mean "Go from -2
What is this -2
Answers
Before you multiply or divide a fraction by a mixed number, you have to make sure they are both in the same___________?
Answers
Answer:
Step-by-step explanation:
form. Meaning you need make both fractions improper
please help I dont know how to do this.
Answers
Answer: The expression would be 2b+7
Step-by-step explanation:
b will be the number of blue beads for the bracelet.
The number of red beads will be represented as b + 7.
Determine the expression for the total number of beads.
Then we can written it as,
= b + (b +7)
= 2b + 7.
:)
show work plas 20 point given
Answers
question 7
1 kilometer = 1000 meters
(you multiply the number of kilometers by 1000)
1000 + 400 = 1400
question 8
1 kilometer = 1000 meters
2000 - 1000 = 1000
8. 1000
check the work in the photo
If xx and y vary directly and y is 21 when x is 7, find y when x is 5
Answers
Answer:
y = 15
Step-by-step explanation:
We need to solve for k
y = x
21 = 7k Divide both sides by 7 to solve for k
3 = k
y = xk
y = 5(3)
y = 15
Answer: y = 15
Step-by-step explanation:
What is 1 raised to the fourth power?
Answers
Answer:
1
Step-by-step explanation:
1 * 1 * 1 * 1 = 1
The length of a rectangular garden is 20 feet and the width is 15 feet. What is ratio of length to width?
Answers
Answer: 4:3 because 20 divided by 5 is 4 and 15 divided by 5 is 3.
Graph the following in cartesian plane. With solution.
1.) 5x - 4y = 20
2.) 3x + 3y = 15
3.) y = 3/4x - 2
4.) y = -3/2x + 3
pls help me I need this pls, I only need the solution, thx
Answers
Step-by-step explanation:
1.) 5x-4y=20
y=5/4x-5
5x/4-5=0
x=4
2.) 3x+3y=15
y=-x+5
x+5=0
-x=-5
=x=5
3.) y=3/4x-2
3/4x-2=0
x=0
3x4x/4 -2 x4x-0x4x
3-2x4x=0x4x
3-8x=0
8x=-3
=x=3/8
4.) y=3/2x+3
3/2x+3=0
x=0x
3x2x/2+3x2x=0x2x
3+3x2x=0x2x
3+6x=0
6x=-3
x=_3/6
=x=-1/2
Determine which expression is equivalent to the expression 5 over 4 times g minus 3 minus 7 over 12 times g minus the expression one over 3 times g plus 15
Answers
Answer:-4/15 - 17
negative 4 over 15 plus negative 17
Explain: negative 4 over 15 plus negative 17
Can someone help me with my math if you help me i will give you a brainliest
Answers
Answer:
Step-by-step explanation:
So its difficult to show
Y= X-6 so what ever x is, y is six less than that so
X= -4 Y= -10
X= 0 Y=-4
X=4 Y=0
X=8 Y= 4
Then plot these on a graph like co-ordinates (x,y) and draw a straight line through them
Y= 4/3x -2 so whatever x is y is 4/3 and 2 less then that
X=-4 Y= -5
X=0 Y= -2
X=4 Y=1
X= 8 Y= 4
Then plot these on a graph like co-ordinates (x,y) and draw a straight line through them
Y= -2
Find minus 2 on the y axis and draw a horizontal line through it all the way across the grid.
Y= 2+ 1/4x so whatever x is y is 1/4 of x add 2
X=-8 Y= 0
X= -4 Y = 1
X=0 Y=2
X=4 Y=3
X=8 Y=4
Then plot these on a graph like co-ordinates (x,y) and draw a straight line through them
Do this method for 9
y = 2x -3 so whatever x is, y is 2 times that -3
y=2x +1 so whatever x is y is 2 times that +1
y= 2x so whatever x is y is 2 times that
Then plot the answers on a graph like co-ordinates (x,y) and draw a straight line through them
Make sure to label each line
Hope this helps
Mackey invested some money in an account paying 6% interest for one year. She invested $1000 more than this amount in an account paying 8.5%. How much did she invest in total if the total interest earned in the year was $737.50?
Answers
Step-by-step explanation:
Let's assume the amount Mackey initially invested in the 6% account is x dollars.
According to the given information, Mackey invested $1000 more than x in the 8.5% account, which means she invested (x + $1000) dollars in that account.
The total interest earned from the 6% account would be 0.06x dollars, and the total interest earned from the 8.5% account would be 0.085(x + $1000) dollars.
The total interest earned in the year is given as $737.50, so we can set up the equation:
0.06x + 0.085(x + $1000) = $737.50
Simplifying the equation:
0.06x + 0.085x + 0.085($1000) = $737.50
Combining like terms:
0.145x + $85 = $737.50
Subtracting $85 from both sides:
0.145x = $737.50 - $85
0.145x = $652.50
Dividing both sides by 0.145:
x = $652.50 / 0.145
x ≈ $4500
Therefore, Mackey initially invested approximately $4500 in the 6% account, and she invested $1000 more, which means she invested a total of $5500.
$4500
$4500
$4500
$4500
HELP ANSWER THIS I WILL GIVE TEN POINTS AND THANKS!
REMEMBER TO EXPLAIN STEP-BY STEP! AND GET THE CORRECT ANSWER!
The units and tens digits of one-two digit integer are the tens and units digits of another two- digit integer, respectively. If the product of the two integers is 4930, what is their sum?
Answers
Answer:
(10t + u)(10u + t) = 4,930
100tu + 10t^2 + 10u^2 + tu = 4,930
101tu + 10t^2 + 10u^2 = 4,930
10t^2 + (101u)t + (10u^2 - 4,930) = 0
(101u)^2 - 4(10)(10u^2 - 4,930)
= 10,201u^2 - 400u^2 + 197,200
= 9,801u^2 + 197,200
We see that u = 5 gives 442,225.
√442,225 = 665
(10t + 5)(50 + t) = 4,930
500t + 10t^2 + 250 + 5t = 4,930
10t^2 + 505t - 4,680 = 0
2t^2 + 101t - 936 = 0
t = (-101 + √(101^2 - 4(2)(-936)))/(2×2)
= (-101 + √17,689)/4
= (-101 + 133)/4 = 32/4 = 8
So the numbers are 58 and 85.
58 + 85 = 143
Three research departments have 8 ,10 , and 7 members, respectively. Each department is to select a delegate and an alternate to represent the department at a conference. In how many ways can this be done?
Answers
We can conclude that exists 211680 ways.
How many ways can this be done?We know that the three research department is have 8, 10, and 7 members.
We choose a delegate and an alternate to represent the department.
First case: department have 8 members.
So, for a delegate, we have 8 options, and for a alternate 7, so a total of
\(8 \times 7 = 56 \ \text{options}\)
Second case: department have 10 members.
So, for a delegate, we have 10 options, and for a alternate 9, so a total of
\(10\times 9 =90 \ \text{options}\)
Third case: department have 7 members.
So, for a delegate, we have 7 options, and for a alternate 6, so a total of
\(7\times6 = 42 \ \text{options}\)
Therefore, we get:
\(56 \times 90 \times 42 = \bold{211680}\)
Hence, we conclude that exists 211680 ways.
For a similar problem about this, please click the link below:
https://brainly.com/question/30958797
For the first department with 8 members, there are 8 choices for selecting a delegate. After choosing a delegate, there remain 7 members, so there are 7 choices for selecting an alternate. Therefore, there are 8 × 7 = 56 ways to select a delegate and an alternate from the first department.
Similarly, for the second department with 10 members, there are 10 choices for selecting a delegate and 9 choices for selecting an alternate. Hence, there are 10 × 9 = 90 ways to select a delegate and an alternate from the second department.
For the third department with 7 members, there are 7 choices for selecting a delegate and 6 choices for selecting an alternate. Thus, there are 7 × 6 = 42 ways to select a delegate and an alternate from the third department.
To find the total number of ways to select delegates and alternates from all three departments, we multiply the number of choices for each department together:
56 × 90 × 42 = 211,680.
Therefore, there are 211,680 ways to select a delegate and an alternate from each department.
An airplane on autopilot took 7 hours to travel 5,005 kilometers. What is the unit rate for kilometers per hour?
and explain your answer plz
Answers
Answer:
Step-by-step explanation:
rate=distance/time
5005/7
=715
The answer is 715. To get the answer, you just divide 5005 by 7 since the rate of speed is steady.
PLEASE HELP 20 points!!! Which of these is a ratio table? A 2-column table has 3 rows. Column 1 is labeled A with entries 1, 2, 3. Column 2 is labeled B with entries 5, 6, 7. A 2-column table has 3 rows. Column 1 is labeled A with entries 1, 2, 3. Column 2 is labeled B with entries 4, 5, 7. A 2-column table has 3 rows. Column 1 is labeled A with entries 1, 2, 3. Column 2 is labeled B with entries 1, 4, 9. A 2-column table has 3 rows. Column 1 is labeled A with entries 1, 2, 3. Column 2 is labeled B with entries 2, 4, 6.
Answers
Answer:
b
Step-by-step explanation:
Answer:
isnt it D?
Step-by-step explanation:
the two numbers are constantly the same ratio so its that right?
A submarine was situated 800 feet below sea level. If it ascends 250 feet, what is its new position?
A. -550 ft.
B. 550 ft.
C. 1050 ft.
D. -1050 ft.
Answers
Answer:
answer a
Step-by-step explanation:
-800 + 250 = -550
Answer:
A. -550 ft
Step-by-step explanation:
-800 + 250 = -550
Jose goes out to lunch. The bill, before tax and tip, was $10.45. A sales tax of 8% was added on. Jose tipped 17% on the amount after the sales tax was added. What was the total cost of the meal, plus tax and tip? Round to the nearest cent.
Answers
help please here is the Question Each week as part of her workout, Monica walks 0.5 mile, runs 1.6 miles, and then walks 0.75 mile.
How many total miles will Monica walk and run in a year? Reminder: there are 52 weeks in a year.
Answers
Explanation:
First add all the amounts (.5+.75+1.6)
Then multiply by the number of weeks in a year (52)
And bam, you have your answer.
How many milometers are in 1 foot?
Answers
Answer:
1 Foot = 304.8 Millimeters
Step-by-step explanation:
:/
304.8 mm are in a foot
PLEASE HELPPP
a hot water tank was full of hot water before eddy used 15 gallons to wash clothes now there is only 80% of the water. how much water, in gallons, does the hot water tank hold?
Answers
Why?: Take 80 percent of 15 gallons.
I need help, please quickly
Answers
Answer: The ratio is 18:3
Step-by-step explanation:
Answer: 6 to 1
Step-by-step explanation:
A ratio refers to a fraction. In this case the question asks how many players to coaches there are.
The word "to" means that is where the fraction bar goes.
Players/Coaches
There are 18 players and 3 coaches.
18/3
18 can be divided by 3, 6 times so the fraction can be simplified to
6/1 meaning there are 6 players for every coach.
you will have to zoom in some
Answers
Answer:
The answer is D
Step-by-step explanation:
Find the function f(g(x)) if f(x) = x^2 + 2x. Given g(x) = x + 1. Also find f(g(2)) = f(2).
Please provide an explanation as well. Thank you! :)
Answers
