A system of equations is shown
Y=2x-5
Y=4x + 3
What is the solution to the system of equations?
A (-4,-13)
B(-4,3)
C (4,-13)
D (4,3)
Answers
Answer:
A. (-4,-13)
Step-by-step explanation:
y = 2x - 5
y = 4x + 3
-2(y = 2x - 5) ==> -2y = -4x + 10
y = 4x + 3 ==> y = 4x + 3
-2y = -4x + 10
y = 4x + 3
___________
-y = 13
/-1 /-1
y = -13
Now we find x, by substituting -13 for y
y = 2x - 5
-13 = 2x - 5
+ 5 +5
-8 = 2x
/2 /2
-4 = x
(x, y) ==> (-4, -13)
Check your answer:
y = 2x - 5
-13 = 2(-4) - 5
-13 = -8 -5
-13 = -13
This statement is correct
Hope this helps!
Related Questions
The sides of an equilateral triangle are all 8 units long. What is the length of the triangle’s altitude?
Answers
Answer:
B or 4[tex]\sqrt[]{3}[/tex]
Step-by-step explanation:
I could be wrong as I'm very new to this math but I believe its 4[tex]\sqrt{3}[/tex]
The rectangular model is made up of squares. Each square is of equal size. What percentage of the model is shaded?
Answers
Answer:
44.5 percent is shaded.
from whole model, 44.5% is shaded of 100%
Solve by substitution or elimination
Answers
Answer:
x=8, y = 0
Step-by-step explanation:
Substitution is easier for this problem.
3x + y = 24 ---> y = 24 - 3x
x^2 + y = 64
Substitute y
x^2 + 24 - 3x = 64
x^2 - 3x = 40
Factor out x
x(x-3) = 40
Pretty much you can guess and check
x = 8
If x = 8, y = 0
or
x^2 - 3x = 40
Complete the square
x^2 - 3x + 2.25 = 42.25
(x-1.5) ^2 = 42.25
Square root both sides
x - 1.5 = 6.5
x=8
x - 1.5 = -6.5
x = -5
Check
x = -5 doesn't work, so x = 8 and y = 0
The are 3 blue marbles, 4 red marbles and 2 yellow marbles. Find the ratio of blue marbles to red and yellow marbles.
Question 2 options:
3:2
4:3
3:4
1:2
Answers
Answer:
3;4
Step-by-step explaining
do the first to ratios the 3rd doesnt matter
:
A median drawn to a side of a triangle is
Select one:
O a. a ray
O b. a segment
O c. a line
Answers
Complete the table.
Milkshakes Cost
Answers
Answer:
3 milkshakes will cost 0.75 cents
4 milkshakes will cost $1.00
Step-by-step explanation:
3 x 0.25 = 0.75
4 x 0.25 = 1.00
Have an amazing day!!
Please rate and mark brainliest!!
If you can help me that would be great the instructions are to factor these polynomial Don’t answer just to get pointsNO LINKS!!!!!!!!!!!
Answers
Answer:
3. 3(x+y)(x-y)
4. (y²+4)(y+2)(y-2)
5. 2(3x+1)(x+2)
Step-by-Step:
3. 3(x²-y²) = 3(x+y)(x-y)
4. y⁴-16 = (y²+4)(y²-4)= (y²+4)(y+2)(y-2)
5. 6x²+14x+4 = 2(3x²+7x+2) = 2(3x+1)(x+2)
PLEASE RATE!!! I hope this helps!!!
If you have any question comment below
(I have verified my answers on an online calculator)
classify these polynomials based on the degree and number terms 3x^2
Answers
Answer:
3x² is "monomial" according to the number of term(s) and "Quadratic" based on degree
Find the pair of acute angles that corresponds to the solution of the equation sin(3x + 11)° = cos(–3x + 79)°
Answers
Answer:
x = 8
Step-by-step explanation:
3x + 2 + 7x + 8 = 90
10x + 10 = 90
10x = 80
x = 8
Determine the point estimate of the population mean and margin of
error for the confidence interval with lower bound 19 and upper bound: 27.
Answers
Using confidence interval concepts, it is found that:
The point estimate of the population mean is of 23.The margin of error is of 4.Given a confidence interval what are the point estimate of the population mean and the margin of error?A confidence interval has two bounds, a lower bound and an upper bound.A confidence interval is symmetric, which means that the point estimate used is the mid point between these two bounds, that is, the mean of the two bounds.The margin of error is the difference between the two bounds, divided by 2.In this problem, the interval is (19,27), hence the point estimate is:
P = (19 + 27)/2 = 23.
The margin of error is:
M = (27 - 19)/2 = 4.
More can be learned about confidence interval concepts at https://brainly.com/question/25890103
Find the lateral area of a cone.
Answers
Answer: B. 1178 cm²
What we are solving for:
The lateral area is, put simply, the surface area of the cone not including the bottom.
The formula is:
L = πr[tex]\sqrt{h^{2} +r^{2} }[/tex]
Height of the cone:
This calls for the height, since it is a right triangle we can use the Pythagorean theorem to solve.
a² + b² = c²
15² + b² = 25²
225 + b² = 625
b² = 400
b = [tex]\sqrt{400}[/tex]
The height is 20 cm
Solving:
Back to the formula,
L = πr[tex]\sqrt{h^{2} +r^{2} }[/tex]
L = π15[tex]\sqrt{(20)^{2} +(15)^{2} }[/tex]
L ≈ 1178.1 cm²
The lateral area of the cone is B. 1,178 cm².
Thomas lives more than 0. 55 km and less than 0. 75 km from his school.
Thomas lives from his school?
A. 0. 06 km
B 0. 50 km
c. 0. 60 km
D. 1. 30 km
Which choice could be the distance Thomas lives from school?
Answers
Answer:
D. answer po
Step-by-step explanation:
Tama yan na D
4x — 3 = 6х - 7
i need it now
Answers
Answer:
x = 2
Step-by-step explanation
4x - 3 = 6x - 7
+7 +7 Adding seven so we can isolate on the Xs
4x + 4 = 6x
-4x -4x Once again, trying to isolate the X
4 = 2x
/2x Divide by 2
2 = x
What is the value for m and n?
Answers
Answer:
M = 8 N = 10
Step-by-step explanation:
Multiplying exponents adds the exponent, meaning that inside of the brackets, it is a^4 * b^5. Multiply the exponents by two because you are squaring the entire equation. Therefore, m=8 and n=10
Option a to buy a house has a monthly cost of 618 dollars, up-front cost of 24,000 dollars, and advantages of a home equity and a yard for a pet. option b to rent close to work has a monthly cost of 950 dollars, up-front cost of 1,900, and advantages of convenient location, garage, and pool. option c to rent further out has a monthly cost of 600 dollars, up-front cost of 1,200, and advantages of 2 bedrooms, light-rail, and pool. which housing choice fits within your recommended monthly budget of $650-780? which option requires you to have at least $24,000 saved?
Answers
Option c is the best option that can be recommended since it has the least total cost for a year.
What is the up-front cost?An upfront cost is an initial sum of money owed in a purchase or business venture.
Option a:
Monthly cost = $618
Up-front cost = $24000
Total cost for a year= 618*12+24000 = $31416
Option b:
Monthly cost = $950
Up-front cost = $1900
Total cost for a year= 950*12+1900= $13300
Option c:
Monthly cost = $600
Up-front cost = $1200
Total cost for a year= 600*12+1200= $8400
Therefore, option c is the best option that can be recommended since it has the least total cost for a year.
To get more about upfront costs visit:
https://brainly.com/question/1803016
Answer:
1st question is A and C only, 2nd question is A only
Step-by-step explanation:
Got it right on edge. Have a great day :)
Originally, a department store bought a set of dishes at a cost of $57.68 and marked it up 125%. After a month, the set of dishes had not sold, so the store marked it down 50%. What was the discounted price?
Answers
Answer:
$64.89
Step-by-step explanation:
57.68 + 1.25 × 57.68
= 57.68 + 72.1
= 129.78
The original price was $129.78.
129.78 – 0.50 × 129.78
= 129.78 – 64.89
= 64.89
The discount price was $64.89.
What is x in this equation -3x+7 = 1
Answers
Not spinning a 5 and flipping tails
Btw the spinner is 1-5
Answers
Answer:
Im confused w ur question or i dont know maybe im just dum.b
Step-by-step explanation:
A plane takes off from an airport at an angle of 14.5°. If the plane is traveling at a velocity of 220 feet per second, how high off of the ground is the plane at 10 seconds?
Answers
The distance of the plane travelling at 220 feet per second off the ground is 151.71feet
How to calculate the maximum height of an objectMaximum height of the plane is expressed as:
[tex]M=\frac{u^2sin^2\theta}{2g}[/tex]
u is the velocity = 220ft/s
θ is the angle of elevation = 14.5°.
g is the acceleration due to gravity
Substitute
[tex]M=\frac{u^2sin^2\theta}{2g}\\M=\frac{220^2sin^2(14.5)}{2(10)}\\M=151.71feet[/tex]
Hence the distance of the plane off the ground is 151.71feet
Learn more on maximum height here: https://brainly.com/question/12446886
help! will give brandie’s t to correct answer
Answers
Answer:
0.25+0.6= 0.9166666667 or 11/12
Step-by-step explanation:
hope this helps
What can you discern about the nature of work on miguel street based on your close reading of the first chapter
Answers
The context clues show that the nature of work on Miguel street based on your close reading of the first chapter is carpentry.
What are context clues?Context clues are the hints that are given in a literary work. They're important for readers to understand a story.
In this case, the context clues show that the nature of work on miguel street based on your close reading of the first chapter is carpentry. This was illustrated by Popo who was a carpenter.
Learn more about context clues on:
https://brainly.com/question/26349330
The context clues show that the nature of work on Miguel street based on your close reading of the first chapter is carpentry.
What context clues?Context clues are the hints that are given in a literary work. They're important for readers to understand a story.
In this case, the context clues show that the nature of work on Miguel street based on your close reading of the first chapter is carpentry. This was illustrated by Popo who was a carpenter.
Learn more about context clues on:
brainly.com/question/26349330
#SPJ4
Nathan was asked to determine the quotient of 10 and 1/7. He claims that the quotient is 70. Which expression below could Nathan simplify to explain how he know his answer is right
A) 70 +1/7
B)10 +70
C)10 x 1/7
D) 70 x 1/7
Answers
Answer:
D
Step-by-step explanation:
The quotient is the result of dividing one number by another.
[tex]\frac{10}{\frac{1}{7} } = ?[/tex]
is how you would represent the quotient of 10 and 1/7.
The opposite of division is multiplication, and those we can rearrange that and get:
[tex]? * \frac{1}{7} = 10, or, ?/7 = 10[/tex]
or in other words, "what number divided by 7 is 10"
The answer becomes clearer, 70 is that number.
D represents this idea.
100 BRAINLY POINTS!!!
The scatter plot below shows the association between two variables.
Which two variables are most likely to have the association displayed by the scatter plot?
A. An animal's height and the number of legs it has.
B. The day of the month on which a person was born and the person's height.
C. The number of hours a person works and the amount of tips the person earns.
D. The number of hours a person spends studying and the number of hours the person spends doing
other activities.
HURRY CUH PLS
EXPLAIN YOUR ANSWER
SHOW YOUR WORK
Answers
Answer:
C
Step-by-step explanation:
This is a very interesting question,
Let's start off by determining what kind of function this is,
by looking at the graph we can say this is an almost linear function. So the correlation between the 2 values must be that if one increases the other increases according to a certain ratio which is our slope.
We want to eliminate wrong answers.
A. Does it make sense that an animal acquires more legs the taller it is?
This doesn't make any sense so A is out.
B. This is like saying, if i'm born in august i must be a good manager. There absolutely no correlation with the month you're born in, to your height.
So B is out.
C. Thus might actually make sense, the more you work, the more tips you make.
D. So basically here i'm saying is, the more i study the more activities i can do? this would be logical if the function were to be a line with a negative slope or "a decreasing line" or a "line going down". But this is not the case.
D is out.
so C must be our answer
Find the value of cos⁻¹ (cos7π/6).
Answers
Answer:
5π/6
Step-by-step explanation:
Given :
cos⁻¹ (cos7π/6)Solving :
We know that : cos⁻¹ cosθ = θBut we can't just do that in this caseBecause the range of cos values is [0, π]Clearly, our value does not lie in this rangeWe have to take a different Quadrant other than the 3rd Quadrant which gives cos a negative valueThe 2nd Quadrant also has cos values negativeTherefore,cos⁻¹ cos (π - π/6)cos⁻¹ cos (5π/6)⇒ 5π/6 ∈ [0, π] ⇒ It lies in the range!Answer:
5π Over 6
Step-by-step explanation:
You can write 7π6 as (π+π6)Thus we can clearly see the angle falls in the third quadrant. And the cosine value in third quadrant is always negative. Hence, cos(π+π6)=−cos(π6)coming back to the question cos−1[cos(7π6)]=cos−1[−cos(π6)]=π−cos−1[cos(π6)]=π−π6=5π6
A river 3 m deep and 40 km wide is flowing at the rate of 2 km/h. How much water will fell into the sea in a minute?
Please answer
Answers
Answer:
The answer is 4000 m³
Step-by-step explanation:
Given;Depth of river (h) = 3mWidth of river (b) = 40mRate of water flow = 2 km/hour To Find;We have to find out how much water will fall into the sea in a minute.Now,
Rate of water flow = 2 km/hour
= 2000m/60min
= 100 m per min
Now, Volume of water flowed in 1 min,
= (100/3) × 40 × 3 = 4000m³
Thus, 4000 m³ of water will fall into the sea in a minute.
Please do number 10. Thanks.
Answers
Answer:
379.94
Step-by-step explanation:
area of a circle is pi*radius squared. Radius is 11. 11*11=121. Now all you have to do is multiply 3.14*121. 3.14*121=379.94
The equation for the area of the circle ⇒ [tex]\pi r^2[/tex]
r: length of the radius --> 11cm[tex]\pi[/tex] --> 3.14Now lets plug in all the known values in the equation:
[tex]\pi r^2=3.14 * 11^2 = 3.14 * 121 = 379.94[/tex]
Thus it wants the answer rounded to the nearest whole number, so
Answer: 380 square centimeters
Hope that helps!
The perimeter of the figure is 90ft. What is the area.
Additional knowledge: figure is a semi circle, use 3.14 or 22/7 as pi to solve
Answers
Answer:
1289.8089172
Step-by-step explanation:
if you do 90 x 2 = 180 you get the circumference of what would be the complete circle, the formula for area with circumference is A = (C^2/4x3.14) so inserting 180, the answer is 2579.61783439, and half of that is a semi circle so 2579.61783439/2 = 1289.8089172
What is f(4) for the function f(x) = 2x + 5?
f(4) =
Answers
Answer:
f(4) = 13
Step-by-step explanation:
f(4) = 2(4)+5
f(4) = 13
Answer:
13
Step-by-step explanation:
f ( x ) = 2x + 5
To find : f ( 4 )
f ( 4 ) = f ( x )
Here,
x = 4
So,
f ( 4 ) = 2 ( 4 ) + 5
= 2*4 + 5
= 8 + 5
f ( 4 ) = 13
William was offered a job that paid a salary of $39,000 in its first year. the salary
was set to increase by 2% per year every year. if william worked at the job for 25
years, what was the total amount of money earned over the 25 years, to the nearest
whole number?
i will give brainiest
Answers
Answer:
The answer is 19500
Step-by-step explanation:
2 times 25 is 50 so just multiply 39,000 by 50% and you get ur answer
Please Help I Don't Understand. Thank You.
Answers
Answer:
Step-by-step explanation: