Solve by substitution.
3x+y=1
2x+2y=6
I'll give Brainliest to the first person
Please explain step by step.
Answers
Answer:
x = 1
y = 4
Step-by-step explanation:
Divide the second equation by 2
2x/2 + 2y/2 = 6/2
x + y = 3
Subtract the new equation from the first equation you were given
3x + y = 1
x + y = 3 Subtract
2x = - 2 Divide by 2
2x/2 = -2/2
x = - 1
x + y = 3
-1 + y = 3 Add 1 to both sides
-1 + 1 + y = 3+ 1 Combine
y = 4
Related Questions
In the park, there are some cats and dogs. The number of cats’ feet is double the number of the dogs’ noses. The number of cats is how many times the number of dogs? Let x be the number of cats, and y be the number of dogs. Write the expression that will help you to solve the problem (expression here). The number of cats is what times the number of dogs.
Answers
Answer:
2y=x
Step-by-step explanation:
Normally, if there were the same amount of cats and dogs, the cats' feet would be quadruple the dogs' noses. But, the question states that it is double the dogs' noses. 2 x 2=4, so there are twice as many dogs as cats.
for which value of x dose f(x)=2?
Answers
Answer: X=-4 Hope you get it right! :)
Step-by-step explanation:
Lisa specializes in baking lemon cupcakes. She bakes 3 dozen cupcakes every hour. The cost (in dollars) of making n cupcakes is given by the function C(n) = 60 + 0.45n.
The function that models the number of cupcakes Lisa makes in h hours is n(h) =
. The cost function in terms of hours, h, is given by
. Lisa's cost for making cupcakes for 2 hours is
.
Answers
Answer: 36h, 60+16.2h, and $92.40.
Step-by-step explanation:
n(h)=36h because there are 3 dozen cupcakes made per hour, to get C(h) you just plug in 36h in place of n and simplify, and then for the final answer 2 is plugged into the equation from the second answer.
The area of the base of a rectangular prism is 24 square feet. If the height of the prism is 8 feet, what is the volume?
Answers
Answer:
5
Step-by-step explanation:
I don't understand this if h(x) |1-7| 23-h(9)
Answers
Answer:
The slope-intercept form is
y
=
m
x
+
b
, where
m
is the slope and
b
is the y-intercept.
y
=
m
x
+
b
Find the values of
m
and
b
using the form
y
=
m
x
+
b
.
m
=
0
b
=
9
The slope of the line is the value of
m
, and the y-intercept is the value of
b
.
Slope:
0
y-intercept:
9
Step-by-step explanation:
The measure of the supplement of an angle is 60° less than four times the measure of the complement of the angle. Find the measure of the angle.
Answers
Answer:
140° and 50°
Step-by-step explanation:
The supplement of the angle (180 - x)
The complement of the angle = (90 - x)
(180 -x) = 4(90-x) - 60
180 - x = 360 -4x - 60
180 -x = 300 - 4x
180 - x + 4x = 300
180 + 3x = 300
3x = 120
x = 40
The supplement (180 - x) = 180 - 40 = 140°
The complement (90 - x) = 90 - 40 = 50°
What is the equation of this graphed line?
Enter your answer in slope-intercept form in the box.
Answers
How:
- As you can see the line goes through the y axis at 2- so we can substitute the c in y=mx + c for 2
- To find the gradient use two points on the line and count across and up, I used (-4,-6) and (0,2) which was 2 across and 4 up: 4 divided by 2 is 2 giving us the gradient to substitute the 2 as m into y=mx+c
That gives us y=2x+ 2
Hopes this helped :)
Can someone please help? This is super hard.
Answers
Answer:
Step-by-step explanation:
20.00
A store marks up the price of a pair of sneakers by 25%. The original price is $60. What is the new price?Juan says the sneakers would be $75Abel says the sneakers would be $45.Who is correct? Why?
Answers
Answer:
Juan is correct.
Step-by-step explanation:
60+60x0.25= 75
A passenger truck has a capacity of 40 people. If only 80% of their seats are occupied. How many passengers are in the truck?
Answers
Answer:
32
Step-by-step explanation:
80 x 40 = 3,200
3,200 / 100 = 32
3
(
2
n
−
4 what is this = to
)
+
6
n
Answers
Answer:
Step-by-step explanation:
2 • (n2 + 2n + 2)
--------------------------
N
Find the quadratic function represented by the following graph.
Answers
Answer:
f(x) = (-3/4)x^2 + 3
Step-by-step explanation:
First, look at the vertex to see if it intersects the y-axis. It does, which is good, because it makes your job a lot easier by making your equation to fill out y = ax + b. Your b is the y value of your vertex, which in this case is 3. Then, your a is the amount you're multiplying plain old x^2 by to get your values (before adding 3). Because the graph is pointing down, you know right away that it's going to be negative. Also, going to the left or right by 2 (the points you are given) from the vertex gives you a result of going down 3. Normally this would mean you move up by 4 (again, from the vertex), so what do you need to multiply 4 by to get -3? -3/4, so that's your a. This makes your equation (y OR) f(x) = (-3/4)x^2 + 3
I hope I didn't make any mistakes reading your graph! I had a bit of difficulty with it unfortunately.
given m||n, find the value of x. ??
Answers
Step-by-step explanation:
6x - 10 = 7x - 30
6x - 7x = -30 + 10
-x = -20
x = 20°
Value of x is 20°
Answer:
x = 20
Step-by-step explanation:
Given m||n meaning the lines are parallel: Two angles are alternate exterior angles and so their measure is same
7x - 30 = 6x - 10 export like terms to the same side of equation
7x - 6x = 30 - 10
x = 20
The current population of a small city is 38500 people. Due to a loss of jobs, the population is decreasing by an average of 150 people per year. How many years (from now) will it take for the population to decrease to 36400 people?
A) Write an equation you can use to answer this question. Be sure all the numbers given above appear in your equation. Use X as your variable and use no commas in your equation.
B) Solve your equation in part [A] for X
Answers
Answer: Equation form: y=mx+b m=slope b=y-intercept slope= -375 y-intercept= 29000 equation: population now, 0 years x = years from now y= -375x + 29000 375x=3000 x=8
Step-by-step explanation:
what is 2x2 (im in college)
Answers
Answer:
4
Step-by-step explanation:
hope this helps lol
The perimeter of a square is 52cm.Calculate the area.
Answers
Answer:
52÷4=13 cm
the area: 13×13=169[tex]cm^{2}[/tex]
Step-by-step explanation:
Six less than x
I'm in 8th
Answers
Answer
I found this. Does this help?
Step-by-step explanation:
If this is an inequality (6 is less than x, or 6 < x), then x is an integer or other value greater than 6.
The variable statement "6 less than x" is (x - 6)
This is a value (variable and constant) where the value of x is determined by an equation
such as x-6 = 4 (x is positive 2) or y = x-6 (y is 6 less than x).
Graph the line that passes through the points (2,−3) and (4,−3) and determine the equation of the line.
Answers
Answer:
Y = -3
Step-by-step explanation:
First lets use this equation to find the slope of the line:
Y2-Y1/X2-X1
Plug in our values:
(-3+3)/(4-2) = 0/2
The slope is undefined because it cannot be 0.
The Y values of the ordered pairs stay the same so we can see that the graph will stay on the Y value -3.
We would graph this line horizontally on Y = -3
7
An amount of $12,000 is invested at a simple interest rate of 2.15% for 3 years. What is the total investment after 3 years?
Answers
The total value of the investment after 3 years given the amount invested is $12,774.
What is the total value of the investment?The total value of the investment is the sum of the amount invested and the interest earned.
The total value of the investment = amount invested + simple interest earned
$12,0000 + (principal x time x interest rate)
$12,000 + (12,000 x 0.0215 x 3) = $12,774
To learn more about interest, please check: https://brainly.com/question/26164549
Laura drove 140 miles on 5 gallons of gasoline. At this rate, how many gallons of gasoline would she need
drive an additional 98 miles?
(A) 3.5 gallons
(B) 4 gallons
((c) 4.5 gallons
(D) 5 gallons
Answers
Answer: A is allways right but ill do the math
Step-by-step explanation:
-150x +15-31x +60-50x -20x
Answers
Answer:
-251x + 75
Step-by-step explanation:
-150x + 15 - 31x + 60 - 50x - 20x
-251x + 75
(I simplified it by combining all the like terms such as -150x, -31x, -50x, and -20x. Adding all of the negative numbers together gets you negative 251x. Then there are positive 60 and positive 15. Adding both positive numbers together gets you a positive 75. When I put both of the solutions together, I got -251x + 75)
fill in the blank to solve the equation below
12 + 24 = 2(6 + _)
Answers
Answer:
12 + 24 = 2(6 + 12)
Step-by-step explanation:
hope this helpss :D
much appreciated if this were marked brainliest <3
Answer:
=12
=2(6+12)
=2(6)+2(12)
=12+24
Step-by-step explanation:
Hope that this is helpful .
Have a great day.
PLEASE HELP ASAP POINTS!!
Write the equation of a quadratic function that has been shifted 3 units down, to the right 2 units, and
stretched vertically by a factor of 5.
Answers
Answer:
y = 5(x² - 2) - 3
Step-by-step explanation:
In y = a(x² - b) + c, a is the stretch factor, -b is the horizontal, and c is the vertical
You did not give us the parent function, so I am going to assume it is y = x²
y = x²
3 units down means the function will be moved 3 units down, so it will look like:
y = (x²) - 3
Shifted 2 units to the right will result in a -2, so we add that in:
y = (x² - 2) - 3
The stretch factor is 5, which goes in front of everything else, multiplying the quadratic,
y = 5(x² - 2) - 3
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
What’s 75% of 2,900.00
Answers
Answer:
2175
Step-by-step explanation:
Answer:
2175
Step-by-step explanation:
9 trigonometric ratio
Answers
Answer:
A
Step-by-step explanation:
Using the sine ratio in the right triangle
sin ? = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{26}{29}[/tex] , then
? = [tex]sin^{-1}[/tex] ([tex]\frac{26}{29}[/tex] ) ≈ 64° ( to the nearest degree ) → A
Answer:
A
Step-by-step explanation:
[tex]Sin X = \dfrac{Opposite}{hypotenuse}\\\\Sin \ X =\dfrac{26}{29}\\\\X = Sin^{-1} \ (0.8965)\\\\x = 63.7[/tex]
x = 64
i have to evaluate for both a and b. i dont know how to do that. helpp
Answers
Answer:
[tex]f(0)=4[/tex]
[tex]f(6)=8[/tex]
Step-by-step explanation:
Solution is attached
the sum of three times a number and eleven is greater than or equal to fifty
Answers
Answer:
3n + 11 ≥ 50
Step-by-step explanation:
The word "sum" refers to addition as it is the term for the answer to an addition problem, so you know that there should be an addition sign in this inequality.
The word "times" means to multiply!
So you are multiplying 3 by some number which we will call it n. Now it says the SUM of 3n and eleven...meaning you are adding 3n and 11.
Greater than or equal to is a way of saying this symbol "≥" And "fifty" in numbers is 50
Your answer should be 3n + 11 ≥ 50
Hope this helps :)
Are the following two expressions equivalent?
13×x
7x+6x
Answers
Yes, 13x and 7x+6x are equivalent. When you simplify 7x+6x you get 13x.
Question
Write an equation of the line that passes through the points.
(0, −2), (4, −2)
Answers
The equation of the line is y = -2
m∠1=12x-11°
m∠2=10x+17°
Answers
Answer:
Step-by-step explanation:
X=26
