Answer:
x = 2, y = -1
Step-by-step explanation:
To solve a pair of equations using substitution, first solve one of the equations for one of the variables. Then substitute the result for that variable in the other equation.
12x+15y=9,−12x−18y=−6
Choose one of the equations and solve it for x by isolating x on the left hand side of the equal sign.
12x+15y=9
Subtract 15y from both sides of the equation.
12x=−15y+9
Divide both sides by 12.
x= 1/12 (−15y+9)
Multiply 1/12 times −15y+9.
x = -5/4y+3/4
Substitute -5y+3/4 for x in te other equation, -12x - 18y = -6
-12 ( -5/4y+3/4) -18y = -6
Multiply −12 times -5y +3/4
15y−9−18y=−6
Add 15y to −18y.
−3y−9=−6
Add 9 to both sides of the equation.
−3y=3
Divide both sides by −3.
y=−1
Substitute −1 for y in x= -5/4y+3/4. Because the resulting equation contains only one variable, you can solve for x directly.
x= -5/4(-1)+3/4
Multiply -5/4 times -1.
x = 5+3/4
Add 3/4 to 5/4 by finding a common denominator and adding the numerators. Then reduce the fraction to lowest terms if possible.
x=2
The system is solved.
uM ANY help pls?
Hopely someone can help!
Answer:
He made 35% of his shots he did not make 65& of his shots
Step-by-step explanation:
7/20=35%, 20/7=65%
Salma, joe, and alan sent a total of 106 text messages during the weekend, salma sent 9 fewer messages than alan. Joe sent 3 times as many messages as alan. How many messages did they each send?
Answer:
Salma, joe, and alan sent 14, 69, and 23 text messages respectively
Step-by-step explanation:
Given that Salma, joe, and alan sent a total of 106 text messages during the weekend, it means that
s + j + a = 106 where s, j, and a are the number of messages sent by Salma, joe, and alan respectively
Given salma sent 9 fewer messages than alan
s = a - 9
Joe sent 3 times as many messages as alan
j = 3a
hence
a - 9 + 3a + a = 106
5a - 9 = 106
5a = 106 + 9
5a = 115
Divide both sides by 5
a = 115/5
= 23
s = 23 - 9
= 14
j = 3* 23
= 69
What is the slope of the linear equation represented by the table. NEEDED PLSS
Answer:28/4
Step-by-step explanation:
Change of y over the change of x.
Y is +28
X is +4
Help ASAP!!!! I’ll give you brainlest
Answer:
A I THINK IM SORRY IF IM WRONG
Step-by-step explanation:
Answer:
It is the second one
Step-by-step explanation:
helppppp pleaaaaaseee
Find a solution to each equation without writing anything down. 2(x+1)=10
Answer:
4
Step-by-step explanation:
Plz answer only if u know u are correct
Answer:
Y=-2x+6
Step-by-step explanation:
what is the median of 9.3 an 6.8?????
Answer:
Désolé mec mais je n'ai pas compris ta question
Help Please!? Thank You!
Solve the system of linear equations by elimination x + 2y = 13 --x+y=5
Answer:
{x,y} = {1,6} Have a great day
Answer: welp its already answred
Step-by-step explanation:
PLEASE HELP WILL MARK BRAINLY
Use a ratio box to solve this problem: Five hundred fifty students attended the assembly. If the ratio of boys to girls in the assembly was 6 to 5, how many girls attended the assembly?
Answer:
250 girls
Step-by-step explanation:
Please let me know if you want me to write an explanation for my answer :)
Michael needs to gain weight. He weighs 120 pounds and thinks he can gain 2 pounds a week. He wants to weigh at least 165 pounds. How long will it take him to reach this goal? inequality: solution:
Answer:
The answer is B
Step-by-step explanation:
janet buys 12 pencils for $1.49. what is the cost per pencil?
Answer:
0.124$
...............
you can simply divide the price of the pencils = 1•49$
by the number of pencils bought = 12
1•49/12
= 0•124$
Answer: 0.124166667 U.S. dollars
((1 U.S. dollar) + (49 U.S. cents)) / 12 =
0.124166667 U.S. dollars
Question 3
This table shows a linear relationship between the amount of water in a tank and time.
Time (minutes) Water (gallons)
0 30
5 20
10 10
Which of these statements is true?
Multiple choice question.
A)
The water in the tank is increasing at a rate of 2 gallons per minute.
B)
The water in the tank is increasing at a rate of 10 gallons per minute.
C)
The water in the tank is decreasing at a rate of 2 gallons per minute.
D)
The water in the tank is decreasing at a rate of 10 gallons per minute.
Answer:
C
Step-by-step explanation:
In five minutes it decreased by 10 gallons (5x2=10), In 10 minutes it decreased by 20 gallons.
what times 1,000 equals 4,320
Answer:
4.32
Step-by-step explanation:
Call the unknown number = x
We have: 1000x = 4320
=> x = [tex]\frac{4320}{1000}[/tex] = 4.32
=> The number we need to find is 4.32
Answer:
4.32
Step-by-step explanation:
Help am i correct please Ehejahrs
The square of an add number is
17
How long will it take for $1,000 to increase to $3,000 if placed into an account earning 3.2% compound
quarterly? (round to the nearest year)
5
Half of Ethan string is equal to 2/3 of Kayla stream the total length of the string is 10 feet how much longer is Ethan string Kayla string
Answer:
10/7 feet
Step-by-step explanation:
Let e = Ethan
k = Kayla
The following equations can de derived from the equation :
1/2 e = 2/3k
multiply both sides of the equation by 2
e = 4/3k --- 1
e + k = 10 --- 2
Substitute for e in equation 2
4/3k + k = 10
7/3k = 10
multiply both sides of the equation by 3/7
k = 30/7
Substitute for k in equation 1
e = (4/3) x 30/7 = 40/7
difference in length = 40/7 - 30/7 = 10/7
Jim buys some tacos and burritos which cost him $15.75. John buys some tacos and burritos which cost him $8.25. Tacos cost $1.50 each and burritos cost $2.25 each, how many of each did Joe and John buy?
Let t = the number of tacos and b= the number of burritos.
1. Which equation represents Joe?
2. Which equation represents John?
3. John bought:
tacos
burritos
4. Joe bought:
tacos
burritos
You are walking in the woods when you spot a bald eagle high up in a tree. You measure the angle of elevation to the eagle to be 67 degrees. You then walk directly to the tree and determine that you were standing 150 ft from the tree when you saw the bald eagle. How high up in the tree was the bald eagle?
Answer:
Step-by-step explanation:
infinite
The height of up in the tree was the bald eagle is, 352.5 feet
What is Division method?Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications.
For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.
Given that;
You measure the angle of elevation to the eagle to be 67 degrees.
And, The angle of elevation to the eagle to be 67 degrees.
Now, Let the height of up in the tree was the bald eagle is, x
Hence, We can formulate;
⇒ tan 67° = x / 150
⇒ 2.35 = x / 150
⇒ x = 2.35 × 150
⇒ x = 352.5 feet
Thus, The height of up in the tree was the bald eagle is, 352.5 feet
Learn more about the divide visit:
https://brainly.com/question/28119824
#SPJ3
The ratio of 15 days to a week is
The ratio of 15 days to a week is 15 : 7.
[tex] \\ [/tex]
Explanation :Ratio of 15 days to a week :
[tex] \sf : \implies 15 \: days : 1 \: week = \dfrac{15 \: days}{1 \: week}[/tex]
[tex] \\ [/tex]
Now, we know that 1 week has 7 days.
[tex] \sf : \implies 15 \: days : 1 \: week = \dfrac{15 \: \cancel{days}}{7 \: \cancel{days}}[/tex]
[tex] \sf : \implies 15 \: days : 1 \: week = \dfrac{15}{7}[/tex]
[tex] \sf : \implies 15 \: days : 1 \: week = 15 : 7[/tex]
[tex] \\ [/tex]
Hence, The ratio of 15 days to a week is 15 : 7.
Please help me find x
you have to find the angles inside the triangle first so
- 180-109 = 71° (angles on a straight line add up to 180°)
- 55° (vertically opposite angles)
71+55= 126
180-126= 54
x=54°
math help please (question 9)
*theres also a hint*
Answer:what are the answer choices
Step-by-step explanation:
Answer:
Point A = (0,1) Point B = (1,2) Point C = (2,4)
Step-by-step explanation:
To find a point's "ordered pair" (x and y coordinates), consider each line a single digit unless the problem states/shows otherwise (ex. if the lines were evidently counting by 2's). Here, we can see each line represents a single digit. First count how many lines to the left/right of the y axis the point is (this will be your x point - ex. point B in this problem has an x valued at 1 because the point was one line to the right of the bold vertical line in the middle (the y axis). If the point is to the left, it is a negative x value, right would be positive, and if the point is on the y axis line. x is 0. You are essentially counting how far along the x axis the point is. Same applies to the y values, given you do the opposite and count how far from the x axis (horizontal bold line) the point is. Above that line is positive, below is negative, and again, if the point is on the x axis (bold horizontal line), the y value is 0. Then simply fill your values in in their corresponding places in the brackets: (x,y).
Hope this helps :) I know math can be especially hard to grasp so it's always okay to ask for help/explanation.
A company charges its customers a flat fee of $6 plus an additional $5 per hour to kennel a dog. A function, C(h), can be used to describe the relationship between the number of hours, h, and the total amount, in dollars, of charges.
Write an equation in function notation to represent the function.
Clara earns $9 per hour for her work. She earned $315 last week
A. Write an equation to represent the number of hours (h) Clara worked last week. Write your answer in the text box
B. How many hours did Clara work last week?
Answer:
35 hours
Step-by-step explanation:
Clara worked for 35 hours because when you do $315/9 it equals 35. So 35 represents the hours she worked last week, and then the equation would just be, 315/9.
ANSWER FOR BRAINIEST
A line passes through the point (-2,9) and (0,-3)
Answer:
Step-by-step explanation:
Answer:
y = - 6x - 3
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (- 2, 9) and (x₂, y₂ ) = (0, - 3)
m = [tex]\frac{-3-9}{0+2}[/tex] = [tex]\frac{-12}{2}[/tex] = - 6
The line crosses the y- axis at (0, - 3 ) ⇒ c = - 3
y = - 6x - 3 ← equation of line
Find an ordered pair (x, y) that is a solution to the equation. 6x-y=9
Answer:
(0, -9)
Step-by-step explanation:
-y= -6x + 9
y = 6x -9
plug in 0 for x
(0, -9)
Perform the indicated row operation:
2 −1 −4 7
−1 2 1 −1
0 10 8 2
equation
2 −1 −4 7
0 10 8 2
Answer:
-1,2,1,-1
3,4,5,5
The other answer is for the question after this one on the edge assignment
Answer:
1ST ANSWER
0 10 8 2
2ND ANSWER
0 3 -2 5
Got it right on edg
