Simplify the following 2a + 3b + 4a – 7b
Answers
You would take 2a and add 4a to it which will give you 6a. Then you will take -7b and add 3b to it. I usually just subtract when the bigger number is a negative. Once you do that though you will get -4b. Finally your answer will be 6a -7b
Answer:2a
We add 2 and 3 and we get 5 then we do 4-7=-3. Then we do 5-3=2 and we add a.(we only add all a’s when we multiply)
And the answer is 2a
Related Questions
The volume of a cylinder is 72 77 cm³. If the radius is 3 cm, what is the height
of the cylinder?
3 cm
OA. 24 cm
OB. 8 cm
O C. 12 cm
O D. 4 cm
Answers
At a recent football game of 8,450 in attendance, 150 people were asked what they prefer on a hot dog. The results are shown.
Ketchup Relish Chili
54 36 60
Based on the data in this sample, how many of the people in attendance would prefer ketchup on a hot dog?
4,225
3,380
3,127
3,042
Answers
By proportion that is:(54/150) * 8450= 54 * 56 1/3= 3042
Answer:
By proportion that is:(54/150) * 8450= 54 * 56 1/3= 3042
Step-by-step explanation:
Some students recorded how many minutes they spent on the phone in one day. They put the results in a Stem-and-Leaf Plot.
What is the mean number of minutes spent on the phone?
Answers
Explanation:
The data from the stem-and-leaf plot is:
10,
24,25,26,
30,30,32,33,
40,45,46
Add up those values
10+24+25+26+30+30+32+33+40+45+46 = 341
Then divide over n = 11 which is the sample size.
341/11 = 31 is the arithmetic mean.
Answer:
341/11 = 31 is the arithmetic mean.
Step-by-step explanation:
Write the equation of the line in slope-intersect from
The coefficients in the equation are b=4 and m=-5
Answers
Answer:
y=-5x+4
Step-by-step explanation:
y=mx+b is slope-intercept form.
Plug in -5 for m and 4 for b.
The equation we're left with is y=-5x+4
Trust me I took algebra in 7th, and passed.
Keira said that if 6 tickets are sold, there should be 2 tickets left. Is Keira correct?
Answers
According to Keira, if 6 tickets are sold, there should be 2 tickets left. However, we don't have any information about the initial number of tickets available.
If the total number of tickets initially was 8, and 6 tickets were sold, then there would indeed be 2 tickets left, supporting Keira's statement.
However, if the total number of tickets initially was less than 8, or if the statement doesn't specify the initial number of tickets, we cannot determine if Keira's statement is correct.
Therefore, without additional information, we cannot determine the accuracy of Keira's statement.
Evaluate 9 • (-4), if a = 2
Answers
Answer: A isn’t in the equation so you don’t need that info.. but 9*-4=-36
Step-by-step explanation:
I want to make sure im doing this right, if you could help it would be great
Answers
Answer:
84
Step-by-step explanation:
7(9+3) you multiply 7 to both numbers like this
63+21 and then you can simplify
84
If you need the other 3 done just comment on this question to tell me
Also please mark brainliest
Answer:
Step-by-step explanation:
1.84
2.32
3.30
4.88
1.
84 because PEMDAS(parenthesis/Exponents/Multiply/Divide/Add/Subtact) says you do parenthesis first. So you add 9 and 3 to get 12. The you do 12*7 to get 84.
NEED HELP ASAP Match each set of information about a circle with the area of that circle.
Drag and drop the card to match the information.
Answers
Answer:
the first one is A The second on C the third one D and last one B
Step-by-step explanation:
2.C
3.D
4.D
Hope this helps
what is the sum of the values less than 34?
Answers
Answer:
use any numbers that you can add and get 34
for example: 22+12
This question is 27 points. A group of friends worked together over the summer mowing lawns to earn money. Altogether, they earned 694.68. If each friend gets one-fourth of the earnings, what rational number represents each friend's amount?
Answers
Answer:
If it's 1/4 then I think there should be 4 friends.
Step-by-step explanation:
Therefore 694.68/4=173.67
Each friend got $173.67
Please help me out..... needed in 30 mins
Answers
Interest = Principal x Rate x Time
Plugging in the given values, we get:
Interest = $1,500 x 0.04 x 3 = $180
So Account A earns $180 in interest over three years.
Similarly, we can find the interest earned by Account B using the same formula:
Interest = Principal x Rate x Time
Plugging in the given values, we get:
Interest = $1,500 x 0.06 x (21/12) = $157.50
So Account B earns $157.50 in interest over 21 months.
To compare the interest earned by the two accounts, we can see that Account A earns more interest than Account B, even though the interest rate is lower. This is because the time period is longer for Account A, giving the interest more time to accrue.
Example 1: Two principal amounts and two simple interest rates that would earn equal amounts of interest in one year are:
Principal 1 = $1,000
Rate 1 = 5%
Interest 1 = $50
Principal 2 = $2,000
Rate 2 = 2.5%
Interest 2 = $50
Example 2: Two principal amounts and two periods of time for which the simple interest earned at 2.59% would be equal are:
Principal 1 = $500
Time 1 = 4 years
Interest 1 = $51.80
Principal 2 = $1,000
Time 2 = 2 years
Interest 2 = $51.80
I'LL GIVE BRAINLIEST I REALLY NEED HELP WITH THESE QUESTIONS, DUE TODAY!
PLEASE WORK OUT I NEED TO SHOW MY WORK PLEASE WORK OUT PLEASSEEE!
1. A group of students went to the movie theater.
Eighteen of the students bought popcorn.
The other 60% of the students bought candy.
How many students were in the group?
2.There are 21,000 fans at a football game cheering for the home team. The other 40% of the total people in attendance are cheering for the away team. How many people are in attendance at the game?
3.Ashley sees a book bag on sale in a store for $22. This is 20% off the original price. What was the original price of the book bag?
Answers
So the other 40% of students is 10 students. In total there are 28 students
2. 21,000 - 40% = 12,600
There are 33,600 people in attendance.
3. $26.40 is the original price
NUMBER 1
If 18 people is 40% that means the we need to start taking 40% off of numbers
40% of 20 is 12
40% of 25 is 15
40% of 30 is 18
So the answer is 30
NUMBER 2
If 21,000 people is 60% that means 20% is 7,000 people and 7,000x5=35,000 so there is a total of 35,000 people at the game
NUMBER 3
You should start taking 20% off of numbers.
20% of 25 is 20 too low so we need to go higher
20% of 26 is 20.8 still too low so lets keep going
20% of 27 is 21.60 closer but too low
20% of 28 is 22.40 which is too high lets go back since 27 is too low and 28 is too high lets start in between
20% of 27.5 is 22.00
So the answer is $27.5.
Find x and y. pls help
Answers
Answer:
y = 21
x = 8
Step-by-step explanation:
AB = 180
27 + 3y = 90°
-27 -27
-----------------------
3y = 63
÷3 ÷3
--------------
y = 21
x + 27 + 3y + 8x + 18 = 180
9x + 45 + 3(21) = 180
9x + 45 + 63 = 180
9x + 108 = 180
-108 -108
-----------------------
9x = 72
÷9 ÷9
----------------
x = 8
I hope this helps!
X = 8
We can figure out Y by finding the right angle. A right angle is 90 degrees so we start out with:
90-27
Then,
63/3
21.
Do the same for X to get 8
The stem-and-leaf plot displays data collected on the size of 15 classes at two different schools.
Mountain View School Seaside School
0 5, 8
9, 8, 2, 0 1 0, 1, 2, 5, 6, 8
8, 7, 6, 5, 5, 4, 4, 3, 1, 0 2 5, 5, 7, 7, 8
0 3 0, 6
Key: 2 | 1 | 0 means 12 for Mountain View and 10 for Seaside
Part A: Calculate the measures of center. Show all work. (2 points)
Part B: Calculate the measures of variability. Show all work. (1 point)
Part C: If you are interested in a smaller class size, which school is a better choice for you? Explain your reasoning. (1 point)
Answers
For Mountain View School:
Data: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 0 + 1 + 2 + 3 + 4 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 8 + 8 + 8 + 9) / 19
= 100 / 19
≈ 5.26
To find the median, we need to arrange the data in ascending order: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5
For Seaside School:
Data: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 1 + 1 + 2 + 2 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 7 + 8 + 8 + 8 + 9) / 19
= 80 / 19
≈ 4.21
To find the median, we need to arrange the data in ascending order: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5
Now let's calculate the measures of variability, specifically the range and interquartile range (IQR).
Range: The range is the difference between the largest and smallest values in the dataset.
For Mountain View School:
Range: 9 - 0 = 9
For Seaside School:
Range: 9 - 0 = 9
Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1) and measures the spread of the middle 50% of the data.
For Mountain View School:
Q1 = 3
Q3 = 7
IQR = Q3 - Q1 = 7 - 3 = 4
For Seaside School:
Q1 = 2
Q3 = 7
IQR = Q3 - Q1 = 7 - 2 = 5
To determine which school is a better choice for a smaller class size, we can consider both the mean and the median.
Both the mean and median for Mountain View School are higher than those for Seaside School. This suggests that, on average, the class sizes at Mountain View School are larger than those at Seaside School. Therefore, if you are interested in a smaller class size, Seaside School would be a better choice
For Mountain View School:
- Median: The median class size is the middle value, which is 25.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (29 + 28 + 28 + 27 + 25 + 24 + 24 + 23 + 21 + 20 + 19 + 18 + 15 + 13 + 10) / 15 = 21.27.
For Seaside School:
- Median: The median class size is the middle value, which is 20.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (25 + 25 + 27 + 27 + 28 + 28 + 28 + 30 + 31 + 35 + 36 + 38 + 40 + 43 + 45) / 15 = 31.13.
Part B:
For Mountain View School:
- Range: The range is the difference between the largest and smallest values, which is 29 - 10 = 19.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 20 and Q3 is 28. Therefore, the IQR is 28 - 20 = 8.
For Seaside School:
- Range: The range is the difference between the largest and smallest values, which is 45 - 25 = 20.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 27 and Q3 is 38. Therefore, the IQR is 38 - 27 = 11.
Part C:
If you are interested in a smaller class size, Mountain View School is a better choice for you because it has a lower mean and median class size than Seaside School.
I NEED THIS NOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
For each of the figures, write Absolute Value equation in the form
|x−c=d|, where c and d are some numbers, to satisfy the given solutions:
Answers
Lucia is creating a rectangular garden in her backyard. Two sides of the garden will each be 10 feet in length, and the other two sides of the garden will each be 15 feet in length. Which option represents the statement you could use to find the total amount of fencing Lucia will need for the perimeter of her garden?
Answers
Answer:
10+15+10+15Step-by-step explanation:
from the question you need the perimeter,
sum all the side.
the answer is 10+15+10+15
Norma has 10 black,12 white,and 3 brown pairs of socks in one drawer. What is the probability that without looking, Norma will pick a BROWN pair of socks from the drawer?
Answers
Answer:
1/100.
Step-by-step explanation:
Total number of socks in the drawer
= 25.
Prob(First pick is brown) = 3/25.
Prob(Second pick is brown) = 2/24 = 1/12.
So the required probability
= 3/25 * 1/12
= 3/300
= 1/100.
Answer:
Ok so the answer to this question would be 3/25
Step-by-step explanation:
The answer to the probability is always a fraction
The numerator is the number of favorable outcomes - in this problem, it is the brown socks
The denominator is the total amount of possible outcomes - in this problem, it is the total amount of socks
3/ 10+ 12 +3 = 3/25
- By the way, have your answer in simplest form - always
Please Help
I need an answer ASAP
Answers
Write an equation to represent the cost ordering balloons from Balloons-R-Fun.
You and your friends are considering having balloons delivered to your favorite teacher on the last day of school. Ballons-R-Fun charges $1.25 per balloon and $6 delivery fee. Singing Balloons charges $1.45 per balloon and $2 for delivery fee. Use a system of equations to calculate what the cost will be if you ordered the same number of balloons from either service.
Answers
Ballons-R-Fun:
cost=(n x 1.25) + 6
Singing Balloons:
cost=(n x 1.45) + 2
* n = number of balloons
If this equation is used:
eg. 5 balloons were order.
Ballons-R-Fun:
cost=(n x 1.25) + 6
cost=(5x1.25) + 6
cost=12.25
Singing balloons:
cost=(n x 1.45) + 2
cost=(5x1.45) + 2
cost=9.25
therefore = singing balloons are cheaper.
3v+2v=25
simplify as much as possible
solve for v
Answers
Find the volume of Prism B
The volume of prism B is _____________cubic units
Enter the number only.
Answers
whats the difference between a sequence and a series?
Answers
Answer:
A sequence is defined as an arrangement of numbers in a particular order. On the other hand a series is defiend as the sum of the elements of a sequence!
Can someone please help me. Due tomorrow.
Answers
Answer:
Rate of change = 142/5 = 28.4
Initial population = 5,428 - 142(5)
= 5,428 - 710
= 4,718
Rate of change/Initial population
= 28.4/4,718 = 71/11,795 = about .602%
28. Question 28 has 2 parts A&B
Anita walked 1/8 of a mile in 1/10 of an hour Part
A: At this rate, how far would Anita walk in an hour?
B At this rate, how long would it take Anita to walk 5 miles?
Answers
Step-by-step explanation:
1)3.8miles
2)15 miles
.................
I know this question is not about math or science but my friends are saying the Leonardo DiCaprio when he was young is hotter than Zac Efron now and when he was young. I need y’alls opinions.
Who is hotter, young Leonardo DiCaprio or 35 year old Zac Efron? My pick is Zac Efron but I want some opinions.
Answers
Answer:
it's Zac Efron for sure, Leonardo DiCaprio is just not the same...
5.6% ______ square root 27
I really need help it's due TODAY
Answers
Answer:
9
Step-by-step explanation:
what is the simplified form of x + 6 / 3 - x + 2 / 3
Answers
Answer:
24
Step-by-step explanation:
Answer:
hi I hope this helps you
Find the surface area of a top open cylinder
12 in radius
2 in height
Answers
The surface area of the top open cylinder is 6810.149 sq.cm.
A cylinder is a three-dimensional solid that consists of two congruent surfaces (bases) and one lateral surface.
Surface area of a cylinder = Base area + Lateral area
Base area of a cylinder = 2 × π × r²
Lateral area of a cylinder = (2 × π × r) × h
Therefore, here base area of a cylinder = 2× π × 12²
= 5837.27 sq.cm.
And, lateral area of a cylinder = (2 × π × 12) × 2
= 972.8784 sq.cm.
Therefore, total surface area of a cylinder = 5837.27 + 972.8784
= 6810.149 sq.cm.
To know more about surface area:
https://brainly.com/question/951562
A group of hikers park their car at a trail head and hike into the forest to a campsite. The next morning, they head out on a hike from their campsite walking at a steady rate. The graph shows their distance in miles, d, from the car on the day of their hike after h hours.
a. How far is the campsite from the car? How do you know?
b. Write an equation that describes the relationship between d and h.
c. After how many hours will the hikers be 24 miles from their car? How do you know?
Answers
Answer:
a. 3
b. h = 1/3d + 3
c. 7 hours because they started at 3 miles and moved at a constant rate of 3 miles per hour
Step-by-step explanation:
for question A it's 3 because they went on a hike from their campsite, not their car and the graph is the distance from their car since the graph starts at 3 this means that the campsite is 3 miles from their car.
for question B it's h = 1/3d because if you look at the graph you can take where two of the points on the line are on a cross-section of the graph and see how many hours and miles there are between the two, then just take the y-intercept or in this case the h intercept and put it after the x or in this case d. Then just simplify the equation, so that the y(d) side is equal to 1, ie: instead of 2y = 8x + 4 its y = 4x + 4.
and finally, for question C, you can just plug the x(d) and y(h) value that is given in this case d = 24, and plug it in so h = 1/3d + 3 becomes h = 24/3 + 3
h=1/3d+3
c: 7 hrs because they started at 3 miles away and went 3 mphs
33 points if ya find the surface area for this triangular prism (Please check your work to see if its correct)