simplify 12 divided (2+4)
Answers
This can also be represented as 12/(2+4).
12/(2 + 4)
12/6
2
The answer is 2.
Answer: +2
Step-by-step explanation: When you're doing a problem like [tex]\frac{12}{2 + 4}[/tex], it's important to understand that a division bar has the same effect on a problem as a set of parentheses in that it groups terms together.
So this 2 + 4 can be thought of as being inside a set of parentheses just like it is in the original problem. Remember from your order of operations that before you do anything else, you must simplify what's inside the set of parentheses.
So the first thing we do here is add 2 + 4 to get 6 and this problem simplifies to [tex]\frac{12}{6}[/tex]. Now we can divide 12 by 6 which gives us +2.
Related Questions
The level of calcium in the blood of healthy young adults follows a normal distribution with mean $\mu=10$ milligrams per deciliter and standard deviation $\sigma=0.4$. a clinic measures the blood calcium of 25 healthy pregnant young women at their first visit for prenatal care. the mean of these 25 measurements is $\bar{x}=9.6$ we want to test the hypotheses $h_0$: $\mu=10$ vs. $h_a$: $\mu<10$ what does it mean if the p-value is 0.0002.
Answers
The p-value of 0.0002 indicates strong evidence against the null hypothesis and suggests that the mean blood calcium level in pregnant young women is less than 10 milligrams per deciliter.
The p-value of 0.0002 indicates the probability of obtaining a sample mean as extreme as 9.6, assuming the null hypothesis (μ = 10) is true.
A p-value of 0.0002 is less than the commonly used significance level of 0.05, which suggests strong evidence against the null hypothesis.
Therefore, we reject the null hypothesis in favor of the alternative hypothesis (μ < 10).
This means that there is sufficient evidence to suggest that the mean blood calcium level in pregnant young women is less than 10 milligrams per deciliter.
The probable question may be:
The level of calcium in the blood of healthy young adults follows a normal distribution with a mean (\(\mu\)) of 10 milligrams per deciliter and a standard deviation (\(\sigma\)) of 0.4. A clinic measures the blood calcium of 25 healthy pregnant young women at their first prenatal care visit, resulting in a sample mean (\(\bar{x}\)) of 9.6.
Now, we want to test the hypotheses \(H_0: \mu = 10\) versus \(H_a: \mu < 10\). If the computed p-value is 0.0002, what does this indicate in the context of hypothesis testing?
If someone sleeps 8 hours a day for 75 years how many hours did that person sleep in his lifetime?
Answers
There are 365 days in a year and 366 days in a leap year.
A leap year occurs every 4 years.
If we divide 75 by 4, we get 18.75. This number represents how many leap years occurred in 75 years. So, the person experienced approximately 19 leap years.
19 leap years has 6954 days.
The other 56 years, which have 365 days each year, have a total of 20,440 days.
That's a total of 27,394 days.
27,394 × 8 = 219,152 hours
This is approximately 24 years or 9,131 days.
0.52 reapeating as a fraction
Answers
[tex]\bf 0.5252\overline{52}\qquad \boxed{x=0.5252\overline{52}} \\\\\\ \begin{array}{llll} 100\cdot x&=&52.5252\overline{52}\\ &&52+0.5252\overline{52}\\ &&52+\boxed{x}\\ 100x&=&52+x \end{array} \\\\\\ 100x-x=52\implies 99x=52\implies x=\cfrac{52}{99}[/tex]
A punch recipe says to mix 4 cups pineapple juice, 8 cups orange juice, and 12 cups seltzer in order to make 18 servings of punch. How many cups of each ingredient do you need to make 108 cups of punch? How many servings can be made from 108 cups of punch? For every cup of seltzer you use, how much orange juice do you use?
Answers
We know how many servings there are in 108 cups.
4 × 6 = 24
8 × 6 = 48
12 × 6 = 72
You need 24 cups of pineapple juice, 48 cups of orange juice, and 72 cups of seltzer to make 108 cups of punch.
I hope that helped! :)
Patrick is reading a book about forest animals. He has read 3/4 of the 100 pages in his book. Nicholas has read 2/3 of the 120 pages about alpine flowers. who has more pages to read in his book?
Answers
Final answer:
Upon calculating, Nicholas, who is reading about alpine flowers, has more pages left to read (40 pages) in his book compared to Patrick, who is reading about forest animals and has 25 pages left.
Explanation:
The question asks who has more pages to read in his book between Patrick, who is reading about forest animals, and Nicholas, who is reading about alpine flowers. To determine this, let's calculate the pages each has already read and then subtract that from the total number of pages in their respective books.
For Patrick: He has read 3/4 of the 100 pages. This means he has read 75 pages (since 3/4 of 100 is 75), leaving him with 25 pages to read.
For Nicholas: He has read 2/3 of the 120 pages. This means he has read 80 pages (since 2/3 of 120 is 80), leaving him with 40 pages to read.
Comparing the pages left to read, Nicholas has more pages to read in his book about alpine flowers than Patrick does in his book about forest animals.
can someone help me please
show your work
Answers
Answer:
a.
[tex]l = 2w - 3[/tex]
What is the scale factor of Triangle ABC to Triangle DEF?
Answers
Answer:
1
Step-by-step explanation:
Nadine is constructing a line perpendicular to KE←→ . She has constructed the arcs as shown. What is the next step in her construction?
Use a straight edge to draw a line through D and M.
Use a straight edge to draw a line through M and K.
Use a straight edge to draw a line through M and E.
The image shows a horizontal line with points K, D, and E from left to right. Point D looks halfway between points K and E. An arc is shown at point K turning inwards towards point D. An arc is shown at point E turning inwards towards point D. Above point D is point M. Two arcs go through point M. One arc faces southwest towards point K and one points southeast towards point E. A line m and an arc. An arc is drawn on line m through center P. Center P lies above the line m. The arc cuts the line on two points labeled as X and Y. Two rays share a common endpoint at R. One ray is horizontal, pointing to the left. The second ray is vertical in an upward direction. A horizontal line segment M N with endpoints labeled as M and N. A horizontal line j and a point A are drawn. The point A is below the horizontal line j.
Answers
b. Yesterday, Gina again mixed red and white paint and made the same amount of paint, but she used one more pint of red paint than she used last week. Predict how the new paint color will compare to the paint she mixed last week
Answers
Which of the functions sketched below could be a probability density function?
Answers
A store plans to mark down all dresses by 60%. Julie wants to purchase a dress that is currently priced at $75. What amount of money will Julie save if she buys the dress after the store marks it down?
Answers
Answer:45
Step-by-step explanation:For Julie's situation, the percent equation becomes:
money saved = percent of markdown × current price
Since the markdown is 60% off $75,
money saved====percent of markdown × current price60%×$750.6×7545
So, Julie will save $45.
Express each rate as a unit rate.
8 tomatoes for $2
Answers
Each tomato is 0.25 cents a piece
The ratio of blue marbles to white marbles in a bag is 4 to 5 at this rate how many blue marbles are there if there are 15 white marbles
Answers
You and two friends got jobs at stores in the mall. You earn
$117.60
$117.60
for
14
14
hours of work. Ty earns
$148.50
$148.50
in
18
18
hours. Kim earns
$137.60
$137.60
in
16
16
hours. Who has the highest pay rate in dollars per hour?
Answers
$117.60/14 = $8.40/hour
$148.50/18 = $8.25/hour
$137.60/16 = $8.60/hour
Kim earns the highest pay per hour.
Write the following term as a cube. 64z^9
(Type your answer using exponential notation.)
Answers
z^9 is (z³)³
so 64z^9 can be written into (4z³)³
Can 3.65909090909 be expressed as a fraction whose denominator is a power of 10? Explain.
Answers
notice above, all we did, was isolate the "recurring part" to the right of the decimal point, so the repeating 09, ended up on the right of it.
now, let's say, "x" is a variable whose value is the recurring part, therefore then
[tex]\bf \cfrac{3659.0909\overline{09}}{1000}\qquad \boxed{x=0.0909\overline{09}} \qquad \cfrac{3659+0.0909\overline{09}}{1000}\implies \cfrac{3659+x}{1000}[/tex]
now, the idea behind the recurring part is that, we then, once we have it all to the right of the dot, we multiply it by some power of 10, so that it moves it "once" to the left of it, well, the recurring part is 09, is two digits, so let's multiply it by 100 then,
[tex]\bf \begin{array}{llllllll} 100x&=&09.0909\overline{09}\\ &&9+0.0909\overline{09}\\ &&9+x \end{array}\quad \implies 100x=9+x\implies 99x=9 \\\\\\ x=\cfrac{9}{99}\implies \boxed{x=\cfrac{1}{11}}\\\\ -------------------------------\\\\ \cfrac{3659.0909\overline{09}}{1000}\qquad \boxed{x=0.0909\overline{09}} \quad \cfrac{3659+0.0909\overline{09}}{1000}\implies \cfrac{3659+x}{1000} \\\\\\ \cfrac{3659+\frac{1}{11}}{1000}[/tex]
and you can check that in your calculator.
What is 3.659090909090909 as a fraction?
Answers
Since there are 16 digits in 659090909090909 , the very last digit is the "10000000000000000th" decimal place.
So we can just say that .659090909090909 is the same as 659090909090909 /10000000000000000.
The fraction fmtterm: Can't handle [-2147483648/-2147483648] 3? is not reduced to lowest terms. We can reduce this fraction to lowest
terms by dividing both the numerator and denominator by -2.14748e+09.
Why divide by -2.14748e+09? -2.14748e+09 is the Greatest Common Divisor (GCD)
or Greatest Common Factor (GCF) of the numbers 6.59091e+14 and 1e+16.
So, this fraction reduced to lowest terms is
So your final answer is: 3.659090909090909 can be written as the fraction
The potential due to a point charge q at the origin may be written as v=q4πϵ0r=q4πϵ0x2+y2+z2√ part a calculate ex using equation ex=−∂v∂x.
Answers
[tex]v= \frac{q}{4 \pi \epsilon _{0} r} = \frac{q}{4 \pi \epsilon _{0} \sqrt{x^{2}+y^{2}+z^{2}} } [/tex]
The x-component of electric field is
[tex]e_{x} = - \frac{\partial v}{\partial x} = -\frac{q}{4 \pi \epsilon {0}}(- \frac{1}{2}) \frac{2x}{(x^{2}+y^{2}+z^{2})^{3/2}} = \frac{qx}{4 \pi \epsilon _{0} (x^{2}+y^{2}+z^{2})^{3/2}} [/tex]
Answer:
[tex]e_{x} = \frac{qx}{4 \pi \epsilon _{0} (x^{2}+y^{2}+z^{2})^{3/2}} [/tex]
Eₓ = [(qx) / [(4πϵ₀r)√(x² + y² + z²)³]
Further explanation
In this problem, we will solve the derivatives of the composite function. The formula used is the chain rule as follows.
[tex]\boxed{ \ If \ f(x) = h(g(x)) \ then \ f'(x) = h'(g(x)) \times g'(x) \ }[/tex]
In words: differentiate the outer function, then multiply it by the derivative of the innermost function.
Given:
[tex]\boxed{ \ V = \frac{q}{4 \pi \epsilon_0 r} \rightarrow V = \frac{q}{4 \pi \epsilon_0 r \sqrt{x^2 + y^2 + z^2}} \ }[/tex]
Question:
Calculate the x-component of electric field by using [tex]\boxed{ \ E_x = - \frac{\delta V}{\delta x} \ }[/tex]
The Process:
This case is a derivative application for electrostatics in physics.
The potential due to a point charge q at the origin may be written as
[tex]\boxed{ \ V = \frac{q}{4 \pi \epsilon_0 r \sqrt{x^2 + y^2 + z^2}} \rightarrow V = \frac{q}{4 \pi \epsilon_0 r}(x^2 + y^2 + z^2)^{-\frac{1}{2}} \ }[/tex]
The outside function is [tex] \boxed{ \ h(x) = \frac{q}{4 \pi \epsilon_0 r}(g(x))^{-\frac{1}{2}} \ } [/tex]The inside function is [tex]\boxed{ \ g(x) = x^2 + y^2 + z^2 \ }[/tex]Let's determine the derivative and run the composite function rule.
The outside function: [tex] \boxed{ \ h'(x) = -\frac{1}{2} \frac{q}{4 \pi \epsilon_0 r}(g(x))^{-\frac{3}{2}} \ } [/tex]The inside function: [tex]\boxed{ \ g'(x) = 2x \ }[/tex]Let us calculate the x-component of electric field by using
[tex]\boxed{ \ E_x = - \frac{\delta V}{\delta x} \ }[/tex]
The composite function rule tells us that
[tex]\boxed{ \ V(x) = h(g(x)) \rightarrow V'(x) = h'(g(x)) \times g'(x) \ }[/tex]
Therefore, [tex]\boxed{ \ E_x = - V'(x) \rightarrow -[h'(g(x)) \times g'(x)] \ }[/tex]
[tex]\boxed{ \ E_x = -[-\frac{1}{2} \frac{q}{4 \pi \epsilon_0 r}(x^2 + y^2 + z^2)^{-\frac{3}{2}} \times 2x] \ }[/tex]
Thus, the result is [tex]\boxed{\boxed{ \ E_x = \frac{qx}{4 \pi \epsilon_0 r}(x^2 + y^2 + z^2)^{-\frac{3}{2}} \ }}[/tex]
[tex]\boxed{\boxed{ \ E_x = \frac{qx}{4 \pi \epsilon_0 r \sqrt{(x^2 + y^2 + z^2)^3} }} \ }}[/tex]
Learn moreUsing the product rule https://brainly.com/question/1578252 The characteristics of electromagnetic waves https://brainly.com/question/727976 Determine the density of our sun at the end of its lifetime https://brainly.com/question/5189537Keywords: calculus, differential, the composite function rule, the potential due to a point charge q, at the origin, physics, application, the chain rule
Find the equation of the parabola y = ax^2 + bx + c that is tangent to the line y = x - 1 at (0,1)
Answers
Differentiate y = ax^2 + bx + c with respect to x: dy/dx = 2ax + b. This is the slope of the tangent line to the parabola at (0,1) But we already know that the line y = x - 1 is tangent to the parabola at (0,1). Thus, 2ax + b = 1 (because the slope of y = x - 1) is 1). At (0,1), 2a(0) + b = 1, so b=1.
Thus, the equation of the parabola becomes more evident:
a) since (0,1) satisfies this equation, 1 = a(0)^2 + 1(0) + c, so c=1
Then y = ax^2 + 1x + 1, and we need only find the value of a.
Since the graph of y = ax^2 + 1x + 1 passes thru (0,1),
y = 1 = a(0)^2 + 1(0) + 1, or 1 = a(0)^2 + 1. 1 = 1, yes, but this does not tell us the value of a!
Is it possible that a could have any value?
Let a = 1. Then y = 1x^2 + 1x + 1. What is the slope of the tan. line to this curve? Differentiating, dy/dx = 2x + 1. At x = 0, the slope of the tan. line is 1. This agrees with the given y= 1x - 1.
Thus, for a = 1 at least, y = 1x^2 + 1x + 1 is the equation of the parabola.
Graphing this equation and the equation of the given line y = x -1 shows that y = x - 1 is tangent to the graph of y = x^2 + x + 1.
Karyn proofreads 15 pages in 2 hours for $40. What is her proofreading rate in pages per hour?
Answers
2 hours = 15 pages
1 hour = 15 / 2
= 7.5 pages
15 pages = $40
1 page = $40 / 15
= $2.666666666666667
7.5 pages= $2.666666666666667 x 7.5
= $20
Hope this helps :))
~Top
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Find the slope of the line passing through the points , (−7,2) and , (9,6) .
Answers
6-2 = 4
9- -7 =16
4/16 = 1/4
slope = 1/4
y₂ - y₁
------- = slope
x₂ - x₁
choose one as your "2" & the other as your "1" Plug them in
6 - 2
------
9 - (-7)
4/16
simplify the fraction
4/16 = 1/4
the slope is 1/4
hope this helps
What is 2,384 divided by 23 and what is 378 divided by 56 pls help me i will give the brainliest answer to someone who answers first
Answers
2nd 6.75
HELP PLZ Which math expression represents the phrase? 9 times the sum of a number and 7 A. 9 · n + 7 B. 9 · (n + 7) C. 9 · (n – 7) D. 9 · (n · 7)
Answers
Sum implies addition.
We would write this part as n + 7.
Then we would write the "9 times" part in like this:
9 · (n + 7)
We can't write just 9 · n + 7 without the parentheses, because then we would be multiplying just 9 and n instead of 9 and the sum of n and 7. (order of operations says we must do multiplication first)
When solving -1/3 (x − 15) = −4, what is the correct sequence of operations? Please help!! 15 points
Answers
-1/3(x-15) = -4
1st step distribute(multiply) the -1/3 with what is inside parenthesis
-1/3x + 5 = -4
2nd step subtract 5 from both sides of the equation
-1/3x = -9
3rd step divide both sides of the equation by -1/3 to get x
x = -9 / -1/3
x = 27
This is how I'd do it:
1) Multiply both sides by -3
2) Add 15 to both sides.
In only two steps you get the solution.
The product of 1.3×10^-4 and a number n results in 2.6×10^12 , what is the value of n?
Answers
Answer:
2x10^16
Step-by-step explanation:
ik im late but in case anyone still needs it
also tell me if u want an explanation
ok i have calculated this and i srill havent got the right answer
Answers
66-19.8 = 46.2
66 x 0.05 = 3.3
46.2 + 3.3 = 49.5
B
If you discount them by 30%, you will only pay 100% - 30% = 70% of their original price.
70% of $66 =
= 70% * $66
= 0.7 * $66
= $46.2
2. Now you have an item that costs $46.20, and you need to pay 5% tax on it.
$46.20 is 100% of the price of the shoes.
If you add 5% to the price, you need to pay 100% + 5% = 105% of the price.
105% of $46.20 =
= 105% * $46.20
= 1.05 * $46.20
= $48.51
Answer: $48.51
Stacy wishes to make a hamburger which is lower in fat without having to give up the great taste. She purchases 5 pounds of ground beef which is 15% fat and combines it with 7 pounds of ground turkey which is only 3% fat. What is the percentage of fat in the mixture?
Please help, 15 pts.
Answers
Amount = 5 lb
Fat = 15% of 5 lb = 0.15*5 = 0.75 lb fat
Turkey:
Amount = 7 lb
Fat = 3% of 7 lb = 0.03*7 = 0.21 lb fat
Total mass = 5 + 7 = 12 lb
Total fat = 0.75 + 0021 = 0.96 lb
Percent fat = 100*(0.96/12) = 8%
Answer: 8%
So, 15 x 5 + 3 x 7
= 75 + 21
= 96
After mixture, Total weight is 12 pounds,
So, 96 ÷ 12 = 8%
Therefore, 8% is the correct answer.
A tree has a height of 18 feet and casts a shadow that is 6 feet in length. A boy, standing at the base of the tree’s shadow, has a height of 4 feet. How long is the shadow cast by the boy?
Answers
height of the three / its shadow = height of the boy / it shadow
18 / 6 = 4 / x => x = 4*6 / 18 = 24 / 18 = 4 / 3
Convert to mixed number: 4 / 3 = 1 and 1/3.
So, the answer is the option A. [tex]1 \frac{1}{3} feet[/tex]
WHOEVER ANSWER THIS AND HAS THE SMARTEST ANSWER I WILL MARK YOU AS BRAINLIEST. 15 out of 20 students own hand-held games; 105 out of 160 students own hand-held games. Determine if each pair of ratios or rates are equivalent. Show ALL your work.
Answers
The second ratio would be 21:32 (also dividing by five).
To determine if they are equivalent rates, you must somehow make them even. Multiplying 3:4 by 7 would give you 21:28. Thus proving they are not equivalant.
in 3/4 pound of a spice mix there is 5/6 cup of cinnamon. how much cinnamon dose the spice mix contain per pound
Answers
[tex]\bf \cfrac{3}{4}=\cfrac{5}{6c}\implies 18c=20\implies c=\cfrac{20}{18}\implies c=\cfrac{10}{9}\implies c=1\frac{1}{9} [/tex]