use substitution to solve the system of equations. Write the solution as an ordered pair.
x + 2y = 14
y = 3x - 14
Answer:
Step-by-step explanation:
x + 2(3x - 14) = 14
x + 6x - 28 = 14
7x - 28 = 14
7x = 42
x = 6
y = 3(6) - 14
y = 18 - 14
y = 4
(6,4)
if loss is loss percent and cost price in CP what will be SP?
Answer:
SP = selling price
SP = [(100 + Gain%) / 100] * CP.
SP = [(100 – Loss %) / 100]*CP.
Answer:
Sp is selling price
Cp is cost price then Wil be profit or loss
At a restaurant, the cost for one breakfast taco and one glass of milk is $2.10.
The cost for two tacos and three glasses of milk is $5.15.
How much would it cost for 3 tacos and 4 glasses of milk
Answer: $7.25
Step-by-step explanation:
Let T = taco cost
Let M = milk cost
T + M = 2.10
2T + 3M = 5.15
Multiply the first equation by (-2) and add it to the second equation
-2T - 2M = -4.20
2T + 3M = 5.15
M = 0.95
Plug this value for M in to the first equation
T + 0.95 = 2.10
T = 1.15
So a taco costs $1.15 and the milk costs $0.95
1.15 * 3 = 3.45
0.95 * 4 = 3.80
3.45 + 3.80 = 7.25
What set of numbers could be the side lengths of a right triangle ?
Answer:
I think it's A 3,4,6 could be the length of the triangle
In the figure, is an exterior angle to triangle .
(a) What is the angle measurement of Angle 3. Explain the angle relationship you used.
(b) What is the angle measurement of Angle 4. Explain the angle relationship you used.
(c) What is angle relationship between angles 3 & 4? What is the angle relationship between angles 1, 2, & 3? What do you notice that is similar between the two? What is different?
(d) The combination of which two angles in the triangle equal angle 4? Use your work from Part C to figure out why this is the case, and explain your conclusion.
Answer:
I don't have c but I do have a and b
Step-by-step explanation:
Part A)
Angle 3 is 103° because 77° + ∠3= 180° and ∠3 = 180° - 77° = 103°
Part B)
Angle 4 is 77° because ∠3 + ∠4 = 180° and ∠4 = 180° - 103° = 77°
These are the answers for k12
Two numbers have an HCF of 84 and an LCM of 4620. Both numbers are larger than the
HCF. Find the two numbers.
Answer:
420 & 924
Step-by-step explanation:
hope it helps!
...
find the slope of the line
Answer:
y=3/4x+3
Step-by-step explanation:
WILL MARK BRAINLIEST!
Please help! What's the simplified expression? Explain why!
Answer:
625^3
Step-by-step explanation:
5*5*5*5=25*5*5=25*25=625
625^3 is the final answer
15. Asriel thinks he has room for a 50 inch TV in his living room. It turns out
he only has room for a 40 inch TV. What is his percent error? *
10%
25%
20%
30%
Answer: 10%
Step-by-step explanation: because if you subtract 50-40 you get 10 and then you just add the % sign and you can cross out d and b.
hope this helps you
Answer:
20%
Step-by-step explanation:
Since, 40/50 is equal to 80/100 we can tell that the 2 are 80% close to eachother, but there is 20% difference!
Hope this Helps! :)
Have any questions? Ask below in the comments and I will try my best to answer.
-SGO
The cost of 7 scarves is $78.75. What is the unit price?
AAH HELP PLEASSSSSSSSSSSSSE (i'll try to mark brainiest for the first person that helps me)
Which of the following expressions represents the value, in dollars, of a certain number of nickels, n, and dimes, d?
0.15nd
0.15n + d
0.10n + 0.05d
0.05n + 0.10d
Answer:
Step-by-step explanation:
dimes=0.10
nickels=0.05
last choice
0.05n+0.10d
an Italian restaurant buys 15 pounds of onions every 2 weeks. how many bags of onions will the restaurant buy in 7 weeks?
Answer:
45
Step-by-step explanation:
This is a trick question. Since they only get three purchases in by 7 weeks, the answer will be 15 times 3 or 45.
(If I'm wrong and it's not a trick question, then it's 15 times 3.5 or 52.5)
Hope this helps!
In this parallelogram, triangle K has an area of 29 square centimeters. What is the area, in square centimeters, of the parallelogram?
29
58
43.5
14.5
Answer:
58. cm^2.
Step-by-step explanation:
Area of parallelogram = 2 * area of triangle
= 2 * 29
=58.
I need help I don’t know what to do!?
Answer:
The slope is 4/3x
Step-by-step explanation:
We can easily find the slope, by looking at the difference between each number on the table. We can see that the x values are rising in 3's, and the y values are rising in 4's. From that we can find the slope, 4/3x, since the slope rises up positive 4, and runs positive 3.
EDIT: forgot the x after the slope
i need urgent help
this is my maths work
Answer:
A. only inequality 1.
Step-by-step explanation:
The inequality 1 can be written as
- 5 = 1 - 3d
- 5 - 1 = - 3d
- 3d = - 6
d = 2
Now the inequality 2 can be written as
- 1 =( 1 - d) / 3
- 3 = 1 - d
d = 1 + 3
d = 4
So the answer is A only inequality 1.
Hope it will help :)
what do you need to add to 3 5/7 to make 6
*
(9) Complete the calculation so that each shows the correct sum.
0.5 1 3 7
+
1
Your answer
Answer:1.5137
Step-by-step explanation:
Lorenzo ate 25 of his bag of almonds. His 4 friends ate equal shares of the remaining bag of almonds. Which expression represents the almonds that each friend ate?
Answer:
(x - 25) / 4
Step-by-step explanation:
In this scenario, we have one unknown variable which is the total of the bag of almonds, therefore we can represent this with the variable x. Since Lorenzo ate 25 of this bag we would need to subtract this from the total of the bag. Then we need to divide the remainder by 4 since each of his friends ate the rest in equal parts. This would leave us with the following expression ...
(x - 25) / 4
1. The distance that Giselle can run is a function of the amount of the time she speeds running. Giselle runs 3 miles in 21 minutes. Assume she runs at a constant rate.
a. Write an equation in two variables that represents her distance run, y, as a function of the time, x, she spends running
b. Use the equation you wrote in part (a) to determine how many miles Giselle can run in 14 minutes.
c. Use the equation you wrote in part (a) to determine how many miles Giselle can run in 28 minutes.
d. Use the equation you wrote in part (a) to determine how many miles Giselle can run in 7 minutes
Answer:
How does she run so fast anyways
Step-by-step explanation:
A. well y=3 mi and x=21min so then we multiply and figure out that it is aproximatly 12mi/hr.
B. I beleive is aproximatly 1.5 mi
C. I think is aproximatly 3.2
Now I know that that is just close but not quite exact but it might get you closer.
There are 18 girls in Mr. Brimley's math class. If 40% of the students are girls, what is the best estimation for the number of boys in the class?
Answer:
30
Step-by-step explanation:
This is an easy one.
So, we know that 40% of the class is girls. We would need to use the other 60% as 60% of the class is boys and we would need to divide.
18/0.6=30
Therefore your answer is 30.
Hope this helps.
Answer:
20
Step-by-step explanation:
It is 40 percent ( given)
18/2=9
9×5=40 (100%)
Girls- 18( given)
Boys- 40-18=22
Rounded off-20
Pls help I need help pls
Answer:
The answer is C. The question states that he will work at LEAST 20 hours per week, which opens the possibility of working more as well. Therefore, the answer is C.
Step-by-step explanation:
Which region did the Visigoths most likely settle?
а Britain
b Gaul
с Africa
d Spain
Answer:
It was Romania, so Spain.
PLS I NEED HELP I ONLY HAVE 15 MINS I BEG YOU PLEASE!! :(
In the year 1984 the average American used to eat 55.7 pounds of chicken. This was 2.8 pounds more than the the year 1982 average. By what percent did chicken consumption increase from the year 1982 to the year 1984?
To solve this, we need to use the z statistic. The formula for z score is:
z = (x – u) / s
where x is sample value = less than 90, u is the sample mean = 90.6, s is the standard deviation = 17.2
z = (90 – 90.6) / 17.2
z = -0.035
From the standard distribution tables:
P (z = -0.035) = 0.4860
Therefore there is about 48.60 % chance that it will be less than 90 pounds
Answer:
I think it increased by 0.05.
Step-by-step explanation:
If you subtract 2.8 from 55.7 you'll get 52.9. So I would divide 55.9 by 52.9 and get 1.05. I then would subtract 1.0
Lauren rides her bike 36 miles in 4 hours. How many feet is Lauren traveling each minute?
Answer:
786 feet per min
Step-by-step explanation:
60 (mins in an hour) x 4= 240 mins
there are 5240 feet in a mile
5240 (feet in a mile) x 36= 188640
188640 divided by 240= 768
Mai, Clare, and Noah are making signs to advertise the school dance. It takes Mai 6 minutes to complete a sign, it takes Clare 8 minutes to complete a sign, and it takes Noah 5 minutes to complete a sign. They keep working at the same rate for a half hour.
Answer:
Mai makes 5 signs
Clare makes 3.75 sings
Noah makes 6 sings
together they make 14.75 sings
Step-by-step explanation:
Find the sum: (3m - 3 + 4n)+ (2m - 2n + 6)
What is mLH?
A
140
B
40
220
D
70
Answer:70
Step-by-step explanation:
Answer:
A 140
Step-by-step explanation:
Mark the center of the circle as O. It's given that
∠IOJ = 70°
∠JOK = 70°
from the drawing it looks like HOI, IOJ and JOK are supplementary angles, which means that they add up to 180°
∠HOI + ∠IOJ + ∠JOK = 180°
∠HOI = 180° - ∠IOJ - ∠JOK
∠HOI = 180° - 70° - 70°
∠HOI = 40°
∠HOI and ∠KOL are cross angles, therefore ∠HOI = ∠KOL = 40°
Since ∠HOL and ∠KOL are supplementary angles
∠HOL = 180° - ∠KOL
∠HOL = 180° - 40°
∠HOL = 140°
2x + 3 + x2, forx: 4
Solve for the value of y.
(8y+1)º
(6y+5)
Answer:
y = 6
Step-by-step explanation:
8y+1 + 6y+3 = 90
14y+6=90
14y=84
y = 6
Find m
Geometry help pls
Answer:
∠WXY=72°
Step-by-step explanation:
2X-2=70+X
2X-X=70+2
X=72° ⇒ ∠WXY=72°
