3x – 9y = 0
–x + 3y = –3
A. infinitely many
B.1
C.2
D.0
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What is the solution to the system of equations?
2x + y= -3
x - 2y= -4
(___,___)
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In a recent golf match, Tiger’s score was 4 less than Phil’s score. Their combined scores totaled 140. Let p represent Phil's score and t represent Tiger's score.
Which pair of equations can be used to determine their scores?
A. p – t = 140
p + t = 4
B. p + 140 = t
p = 4
C. p + t = 140
p – t = 4
D. p + t = 140
p + t = 4
(i think this one is C)
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The system of equations is coincident.
What are the missing values?
3x + y= 7
9x + __ y= __
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Allison and her husband Noah both get in their cars and begin to drive at the same time. Allison starts 360 mi from their home and drives directly home at a constant rate of 50 mph. Noah starts at their home and drives away from the home at a constant rate of 40 mph. The system that models this situation is given, where d represents the distance from home, and t represents time, in hours. The solution to the system is (4, 160).
What is the correct interpretation of the solution to this system?
d = 360 - 50t
d =40t
A. Noah will be 160 mi from home and Allison will be 4 mi from home.
B. Allison and Noah will both be 160 mi from home after 4 h.
C. Noah will be 4 mi from home and Allison will be 160 mi from home.
D. Allison and Noah will both be 4 mi from home when they drive for 160 min.
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please help me I dont understand these.
if x varies directly with y, and x=9 when y =6, find x when y = 15
explain
Direct variation problems use the equation y = kx
Replace y and X with the two known numbers to solve for k:
6=k9
Solve for K by dividing both sides by 9:
k = 6/9, reduces to 2/3
Now replace y and k into the formula to solve for x:
15 = 2/3x
Solve for X by dividing both sides by 2/3:
X = 15 / 2/3
X = 45/2 as an improper fraction, 22 1/2 as a proper fraction or 22.5 as a decimal.
Not sure which format the answer needs to be in, so I gave all three.
Use a proportion:
Yardstick is 3 feet long
The statement that best describes the domain of this function is Option(C).
In mathematics, a function is an expression, rule, or law that describes the relationship between one variable (the independent variable) and another variable (the dependent variable).
The domain of a function is the set of all the function's possible x-values.
According to the definition of domain, when 1 ≤ x ≤ 9, the function is completely defined, hence option(C) is correct.
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The third answer cHoICE is the correct answer
At x = -2, the graphs of equations 2x - y = 6 and 5x + 10y = -10 intersect at the point (-2,-2).
A graph is a visual representation that shows the relationships between two or more items or values. It typically involves plotting points and connecting them to form a diagram.
To find the point of intersection of the graphs of equations 2x - y = 6 (i) and 5x + 10y = -10 (ii), we can follow these steps:
List out the points that satisfy each equation:
For equation (i):
For equation (ii):
Plot the points on a graph and join them to get the graph of each equation.
Identify the point(s) of the intersection of the two graphs. From the graph, we see that the two graphs intersect at the point (-2,-2).
Therefore, we can conclude that at x = -2, the graphs of equations 2x - y = 6 and 5x + 10y = -10 intersect at the point (-2,-2).
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Answer:
The solution to the equation is: (x,y) = (2,-2) If that helps
Step-by-step explanation:
// Solve equation [1] for the variable y
[1] y = 2x - 6
// Plug this in for variable y in equation [2]
[2] 5x + 10•(2x-6) = -10
[2] 25x = 50
// Solve equation [2] for the variable x
[2] 25x = 50
[2] x = 2
// By now we know this much :
x = 2
y = 2x-6
// Use the x value to solve for y
y = 2(2)-6 = -2
Solution :
{x,y} = {2,-2}
☆ please work out on paper if you can☆