What is the value of _a_ in the equation below?
2a + 3 = 4a + 5
Answers
Step-by-step explanation:
hope it is helpful to you
Step-by-step
Simplifying 2a + 3 = 4a + 5
Reorder the terms: 3 + 2a = 4a + 5
Reorder the terms: 3 + 2a = 5 + 4a
Solving 3 + 2a = 5 + 4a
Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right.
Add '-4a' to each side of the equation. 3 + 2a + -4a = 5 + 4a + -4a
Combine like terms: 2a + -4a = -2a 3 + -2a = 5 + 4a + -4a Combine like terms: 4a + -4a = 0 3 + -2a = 5 + 0 3 + -2a = 5 Add '-3' to each side of the equation. 3 + -3 + -2a = 5 + -3 Combine like terms: 3 + -3 = 0 0 + -2a = 5 + -3 -2a = 5 + -3 Combine like terms: 5 + -3 = 2 -2a = 2 Divide each side by '-2'. a = -1 Simplifying a = -1
Related Questions
What is the best way of choosing a sample to statistically represent a population? Why? What is a biased sample? How can biased sampling affect the statistical study of a population?
Search the Internet and give two or more real-world examples of biased sampling leading to unexpected or unfavorable outcomes. In each case, how could the sample have been improved to make a more accurate inference about the population?
Answers
Answer: In random sampling, the whole population should have an equal chance of being chosen.
Step-by-step explanation:
In a simple random sample, every member of the population has an equal chance of being selected.
Your sampling frame should include the whole population. To conduct this type of sampling, you can use tools like random number generators or other techniques that are based entirely on chance.
Biased sample
A sample is biased if individuals or groups from the population are not represented in the sample.
In statistics, sampling bias is a bias in which a sample is collected in such a way that some members of the intended population have a lower or higher sampling probability than others.
Affects
It affects the internal validity of an analysis by leading to inaccurate estimation of relationships between variables. It also can affect the external validity of an analysis because the results from a biased sample may not generalize to the population.
Sampling is one of the procedure to get information about population. The best way to choose a sample representing a population is simple random sampling.
Why do we do sampling?We do sampling so that we don't have to work on entire population of items but only on that sample in a way that we can predict information about population.
Most of the times, it isn't possible in real world to work on entire populations. Samples come out for rescue by assumptions that they will have some properties of the population pertained in them.
Thus, the sample should be taken out such that it includes data of the population as much as it can in unbiased way so as to imitate population. (assuming that we want the sample to contain the summary of the population).
What is simple random sampling?If the sampling is done from the population randomly, without any other rule, then such sampling is called simple random sampling. Items are selected in a fixed size, all randomly.
What is stratified sampling?Sampling which is done by taking the main population divided in categories(called strata), then such sampling from stratas (sub-parts of the population) is called stratified sampling.
What is systematic random sampling?In this type of sampling, starting of the sampling is done randomly, but then rest of the samples are collected by an order. Like for example, first point is selected randomly, then all points are selected that they are equidistant from each other in the population.
What is convenience sampling?The word "convenience" summarizes this sampling. It is done in a way that those values from population are sampled which are in convenience with the researcher. Like if some random picking is to be done from beads spread on the ground, then the researcher picking those beads which are closer to him.
Convenience sampling and stratified sampling are biased, as convenience sampling is leaving a good amount of population untouched, and stratified sampling is taking about sub-parts of the population.
The systematic random sampling is not good in those cases where population doesn't contain variation equally, and we might end up doing systematic sampling in that region which is biased than other regions.
The best sampling is simple random sampling, as it is randomly picking data values from the population, so is most probable to get the properties of the population(the more you're lost, the more probable you're to get to new paths). If sample size is large enough, this sampling comes out as best sampling method, in context of summarizing the information of the population, as almost all of the properties of the population is covered by values obtained during simple random sampling.
Thus, the best way to choose a sample representing a population is simple random sampling. (assuming that we want to summarize the population).
Learn more about simple random sampling here:
https://brainly.com/question/25644040
Find the area of a trapezoid with bases of 8 and 16 and a height of 10. Type a numerical answer in the space provided. Do not include units or spaces in your answer.
Answers
Answer:
A=120
Step-by-step explanation:
I havent had to do this in a while but i hope this is correct
Answer:
120
Step-by-step explanation:
hope this helps
brainliest pls
will give branliest
how do i write 5(7j + 6 + 3j) into a verbal expression?
Answers
Hope this helps :)
8. A peacock weighs 152 ounces.How many pounds does the peacock weight?
9. Jessica’s water bottle holds 0.75 liters of water.How many milliliters of water does the bottle hold?
10. Magnus found a moth and measured its wingspan. If the moths’s wingspan was 27 millimeters, how many centimeters is the moth’s wingspan?
Answer the question right
Answers
Answer:
10
Step-by-step explanation:
Find the perimeter of the trapezoid below.
Answers
Answer:
62
Step-by-step explanation:
Ethan has a rectangular sandbox with a side length of 12 inches, a width of 8 inches, and height of 1012 inches.
What is the capacity of the sandbox when it is 13 full?
Group of answer choices
336 in3
672 in3
1008 in3
1512 in3
Answers
;)
Seth deposited $40 in a savings account that earns 5% interest each year. How much interest will he earn in 1 year?
Answers
Answer:
$2
Step-by-step explanation:
The formula for simple interest is i = p*r*t, where r is the annual interest rate expressed as a decimal fraction. Here the principal is $40 and the elapsed time is 1 year. The amount of interest collectible after 1 year is thus:
i = ($40)(0.05)(1) = $2
Answer:
$2
Step-by-step explanation:
You roll a 6-sided die two times.
What is the probability of rolling an even number and then rolling an even number?
Answers
Answer:
1/3%
Step-by-step explanation:
Answer:
1/4 or 25%
Step-by-step explanation:
even numbers are 2,4,6
P=(3/6)×(3/6)=(1/2)×(1/2)=1/4
tysm 30 points!! pls answer correctly
Answers
Answer:
The answer is 4 trust me i'm in high school.
Step-by-step explanation:
Plzz mark brainliest
Help please I have 10 minutes !!
Answers
Answer:
<EGD+<FGB+<BGD= 180°
79+79+<BGD=180°
158+<BGD=180°
<BGD=180°-158°
<BGD=22°
<BGD and p are alternate angles
and so are equal
therefore p= 22°
The state transportation commission counted cars traveling east and west across a toll bridge. The commission counted 20,000 cars traveling east and 30,000 cars traveling west. What percentage of the cars were traveling east?
Answers
Answer:
Eh cafe donete mal reo jama kolotake? 24 eh moi -09....? kelare mei osaje.
car`e 3,000 = 2458.0? maro et
Step-by-step explanation:
Answer:
9490.0
Step-by-step explanation:
Help me with PART B!!! Use image to help!!
Answers
i multiplied .2222 times 18
What is the bottom and what is the frequency??? Please do this asap
Answers
Answer:
Im sorry im confusded
Step-by-step explanation:
.
1Determine which of the following expressions are equivalent. Show your work.
1/6(x – 3)
1/4x-3/5-1/12x+1/10
1/18x + 1/9x-1/2
Pls help! i will give brainly!
Answers
Samantha is making goodie bags for a birthday party. She puts 2 slices of pie in each goodie bag. Her sister then puts an equal amount of pie slices in the bags, as well. Altogether they put a total of 25 pies in 5 goodie bags. Draw a tape diagram to represent this problem.
How much pie did Samantha’s sister place in each bag?
Answers
25 pies
25/2= 12.5
12.5=2.5
The answer varies if you choices are whole numbers or fraction, right now it would be 2 and a half pies but it could change if they are asking for a whole number
Pepino’s pizza charges $8 for medium pizza plus $2 for each topping. How many toppings are on a medium pizza that costs $20?
Answers
Answer:
6 toppings
Step-by-step explanation:
Find how much the toppings cost in total without the medium pizza.
20 - 8 = 12
12 ÷ 2 = 6 toppings
Here you go amiragumbs2
Answers
A farmer has a rectangular field with an area of 2 3/4 square miles. The field is 1/2 mile wide. What is the length of the field? Write your answer as a decimal.
Answers
Answer:
A farmer has a rectangular field with an area of 3/4 square mile. The field is 1/2 ... The field is 1/2 mile wide. What is the length of the field? 2. See answers ... 3/4 divided by 1/2 is 1.5 or 5/2 therefore the field is 5/2 miles long
Step-by-step explanation:
Answer:
the answer isnt 5/2 i dont think so
Step-by-step explanation:
A restaurant manager uses the expression 7.85m + 8.85d to calculate his profit when he sells m main courses and d desserts. What is the restaurant manager's profit, in dollars, when he sells 45 main courses and 43 desserts?
Answers
Answer:
244 and 43
Step-by-step explanation:
hope this helps n please mark brainliest
Answer:
$733.80
Step-by-step explanation:
To calculate the profit, you use 7.85m + 8.85d
Since m = 45 and d = 43,
his profit = (7.85 × 45) + (8.85 × 43)
= 353.25 + 380.55
= 733.80
∴The restaurant manager's profit in dollars is $733.80.
Hope this helps
Lake City uses a cone-shaped building to store the salt they spread on their roads during winter. Each storage building has a radius of 39 feet and a height of 48 feet.
Using 3.14 for , approximately how much salt can each storage building hold?
A. 76,415.04 cubic feet
B. 229,245.12 cubic feet
C. 5,878.08 cubic feet
D. 94,049.28 cubic feet
Answers
Answer:
I believe that the answer is A. 76,415.04 cubic feet
Step-by-step explanation:
I used a formula I found online
Hope this helps
−3√27−2√2−3√45−√18 simplify
Answers
Answer:
Step-by-step explanation:
Prime factorize 27 , 45 and 18
[tex]-3\sqrt{27}-2\sqrt{2}-3\sqrt{45}-\sqrt{18}=-3\sqrt{3*3*3}-2\sqrt{2}-3\sqrt{3*3*5}-\sqrt{3*3*2}\\\\=-3*3\sqrt{3}-2\sqrt{2}-3*3\sqrt{5}-3\sqrt{2}\\\\=-9\sqrt{3}-2\sqrt{2}-9\sqrt{5}-3\sqrt{2}\\\\=-9\sqrt{3}-9\sqrt{5}-2\sqrt{2}-3\sqrt{2}\\\\=-9\sqrt{3}-9\sqrt{5} + (-2-3)\sqrt{2}\\\\=-9\sqrt{3}-9\sqrt{5} - 5\sqrt{2}[/tex]
how do i find text structure?
Answers
Answer:Examples of text structures include: sequence/process, description, time order/chronology, proposition/support, compare/contrast, problem/solution, cause/effect, inductive/deductive, and investigation.
How many solutions will this system have?
A. Infinitely many solutions
B. No clue
C. No solution
D. One solution
Answers
The lines are on each other so every solution is correct
Answer:
one line over another is infinitely many solutions or to the letter A
hope it helps you and pls brainlies
Find the quotient.
2 7/9 ÷ 2 1/2
Answers
Answer:
2/7
Step-by-step explanation:
anyone can help me please?
Answers
Answer:
40% is what i think it is
Write a numerical expression to match the word expression. ) Two less than one-third of the product of nine fourths and twelve 12 1 3 2 alt ( x 12) 4
Answers
Answer:[tex]\frac{1}{3} ((\frac{9}{4})(12))-2[/tex]
Step-by-step explanation:
Which cereal box deal has the best price per ounce?
$9.13 for 39 oz
$6.12 for 24 oz
$4.98 for 18 oz
$3.56 for 14 oz
Answers
Answer:
I believe it is A.
i hope this helped
I really need help!! Which box doesn't belong??
Answers
Answer:
I think it's C
Step-by-step explanation:
A is go up one time
B is go down one time
C is... not sure what's going on there
And D is multiply by 8
I'm confused.
A restaurant manager uses the expression 7.85m + 8.85d to calculate his profit when he sells m main courses and d desserts. What is the restaurant manager's profit, in dollars, when he sells 45 main courses and 43 desserts?
Answers
Answer:733.8 dollars in profit
Step-by-step explanation:
hope this helps :)
If each cube has a side measure of 12 inch, what is the volume of the rectangular prism?
Group of answer choices
414 in3
712 in3
75 in3
480 in3
Answers
Answer:
nii pata didi plz dil dedo
