Answer:
See explanation below
Step-by-step explanation:
Question is incomplete. Here's the whole question:
"Two solutions of different concentrations of acid are mixed creating 40 ml of a solution that is 32% acid. one-quarter of the solution is made up of a 20% acid solution. the remaining three-quarters is made up of a solution of unknown concentration, c. equation can be used to determine c, the unknown concentration?
a) 30c + 10(0.2) = 40(0.32)
b) (c) + (0.2) = 40(0.32)
c) (c)( (0.2)) = 40(0.32)
d) 30(c)(10(0.2)) = 40(0.32)"
With this, we can now solve the question.
We have a solution that was made mixing2 different solutions of acid. In this case, we can assume the following:
Solution 1 = 40 mL 32% acid
Solution 2 = 1/4 solution 1, 20% acid
Solution 3 = 3/4 solution 1, c% acid.
Thus we can say:
Solution 1 = Solution 2 + Solution 3 (1)
Now, 1/4 of the volume of solution 1, means that we use 10 mL of a 20%acid, and the remaining 30 mL is the unknown acid.
With this, we can discart option b) and c) because these option are not considering the volume of solution 3 used. Option d is not doing any sum, only multiplications, so, this is not the option to use. We can easily say it's option a, but let's prove it.
In general terms, concentrations and volume are related, and if we have two solutions, the information of these two solutions must be conserved in the resulting solution. In other words:
M₁V₁ = M₂V₂
According to this, the concentration of the unknown acid would be:
30c + 0.2*10 = 40(0.32)
30c + 2 = 12.8
30c = 10.8
c = 0.36
Which means that the concentration of the acid is 36%
Hope this helps
Answer:
A. a) 30c + 10(0.2) = 40(0.32) !
Step-by-step explanation:
EDG
I need the answer pls Immediately!!!!!!!
Answer:
Equation: y = 5x - 2
Step-by-step explanation:
Slope = Change in y / Change in x
Change in y = +5
Change in x = +1
Slope = 5/1 or 5
Y-intercept = y-value where x = 0
x = 0, y = 3-5
y = -2
y-intercept = -2
Finally;
Equation: y = 5x - 2
Hope this helps!
Answer:
y = 5x - 2
Step-by-step explanation:
(1,3) (2,8)
y2 - y1 / x2 - x1
8 - 3 / 2 - 1
5
y = 5x + b
3 = 5(1) + b
3 = 5 + b
-2 = b
PLEASE HELP ME FAST! WILL GIVE BRAINLIEST.
What is the length of the segment joining the points at (−3, 0) and (5, 6)?
Enter your answer in the box.
units
Answer- √ 26
Explanation:
Use the distance formula:
√ ( y 2 − y 1 )² + ( x 2 − x 1 ) ²
Plug in your values:
√ ( − 5− ( − 4 ) )² + ( 2 − ( − 3 ) )²
Simplify:
√ ( − 1 )² + ( 5 )²
Simplify:
√ 1 + 25
Simplify:
√ 26
-----------------------------------------------------
Anyways bye!
ASAP!!!!
In a class of 30 students, 17 have a brother and 14 have a sister. There are 8 students who have a brother and a sister. What is the probability that a student chosen randomly from the class does not have a brother?
Answer:
[tex]\frac{14}{30} = 7/15[/tex]
The probability that a randomly selected student has a brother given they have a sister is 11/30.
We have given that,
Of 30 students in a class, 17 have a brother, 20 have a sister, and 11 have a brother and a sister.
What is the formula for probability?The Probability of an event is the ratio of the number of favorable events divided by the total number of outcome in the sample space.
Since there are 30 students in total, and 11 of them have both a brother and a sister,
Then 11/30 (11 out of the 30 students) would be the probability of a student having a brother given that they have a sister.
To learn more about the probability visit:
https://brainly.com/question/24756209
#SPJ2
The Ace Bicycle Shop charges a flat fee
of $4, plus $1 per hour, for the hire of a
bicycle. The Best Bicycle Shop charges
a flat fee of $8, plus 50 cents per hour.
Connie and her friends hire three bicycles
from Ace, and David and his brother hire
two bicycles from Best. After how many
hours will their hire costs be the same?
Answer:
x = number of hours = 8 hours
Step-by-step explanation:
Let
x = number of hours
There are 3 people who rented bicycle from each shop
Ace bicycle shop:
Total cost = 3(4 + x)
= 12 + 3x
Best bicycle shop:
Total cost = 3(8 + 0.50x)
= 24 + 1.5x
Equate both equations and solve
12 + 3x = 24 + 1.5x
12 - 24 = 1.5x - 3x
-12 = -1.5x
x = -12/-1.5
x = 8 hours
x = number of hours = 8 hours
What quadrant does this lie in: cot(theta)>0 and sin(theta)>0?
Answer:
lies on IV quadrant
Step-by-step explanation:
A farmer has 200 feet of fencing to use for a chicken pen. He wants the width of the pen to be 27 feet. What will the length be?
Answer:
Length will be 173
Step-by-step explanation:
Find the distance between the two points (-2,3) (2,4)
Answer:
Not sure of the answer but may be is 2/6
Answer:
[tex] \sqrt{17} [/tex]
Old Grandpa Joe left half his money to his granddaughter and half that amount to his grandson.
He left a sixth to his brother, and the remainder, £1,000, to the Dogs’ home.
How much did he leave altogether?
Answer:
£12000
Step-by-step explanation:
Granddaughter -- 1/2 of x
Grandson -- 1/2(1/2 of x)
Brother -- 1/6 of x
Dogs' home -- £1000
Therefore,
[tex]\frac{x}{2} + \frac{x}{4} + \frac{x}{6} + 1000 = x[/tex]
x = 12000
Thenks and mark me brainliest :)
The type of number that cannot be expressed as a fraction because the fractional part would go on for infinity without ever repeating a sequence is:
Who could help me please and thank you
Answer:
"The expression represents a cubic polynomial with 3 terms. The constant term is -10, the leading degree is 3, and the leading coefficient is (-1/6)"
Step-by-step explanation:
We have the expression:
[tex]-\frac{x^3}{6} - 10 + x[/tex]
First, what does that expression represents?
As al the powers of x are positive numbers, we can see that this is a polynomial, and the largest power is 3, so this is a polynomial of degree 3, also called a cubic polynomial.
How many terms are there?
The terms are the things separated by + or - symbols, is easy to see that there are 3 terms.
What is the constant term?
The constant term is the term where the variable, x, does not appear, here the constant term is: -10
What is the leading coefficient?
The leading coefficient is the coefficient that multiplies the term with the largest power of x, in this case, we can rewrite:
[tex]-\frac{x^3}{6} -10 + x = (\frac{-1}{6})*x^3 - 10 + x[/tex]
the leading coefficient is:
(-1/6)
There is a part of the statement that I can't read, i suppose that there says:
"leading degree"
this is just the largest power of x that appears in the polynomial, in this case, is 3.
Then the complete statement is:
"The expression represents a cubic polynomial with 3 terms. The constant term is -10, the leading degree is 3, and the leading coefficient is (-1/6)"
Whoever answers correctly gets brainliest also write the numbers down
Answer:
Jacob
Brennan
Adrienne
Valerie
Step-by-step explanation:
Positive and nonlinear follows the first one so that's Jacob's
clustering is in the fourth one so that's Valerie's
2 and 3 have an outlier so look at next one
negative and linear is the third one so that is Adrienne's and the second one is Brennan's
If 2y =a and y =3x +12 what is a?
Step-by-step explanation:
2y=a
y=a/2
putting value of y
y=3x+12
a/2=3x+12a=6x+24stay safe healthy and happy ...I need help immediately!!!!!!!
Answer:
y = -2/3x - 5
Step-by-step explanation:
It takes 1/4 of an hour to mow 1/5 of his yard. How much of the yard can he mow per hour
Answer:
4/5
Step-by-step explanation:
if it take 1/4 of an hour to mow 1/5 of his yard.
First you have to find out what is 1/4 of an hour which in order to find you have to multiply 1/4 by 60 because it has 60 mins in an hour. You now have 15 mins and we already know there are 60 mins so we divide 60 by 15 which give you 4 then you multiply 1/5 by 4 which gives you 4/5 or 0.8.
If a customer rolls the dice and rents a second movie every Thursday for 30 consecutive weeks, what is the approximate probability that the total amount paid for these second movies will exceed $15.00?
Complete Question:
Every Thursday, Matt and Dave's Video Venture has "roll-the-dice" day. A customer may choose to roll two fair dice and rent a second movie for an amount (in cents) equal to the numbers uppermost on the dice, with the larger number first. For example, if the customer rolls a two and a four, a second movie may be rented for $0.42. If a two and a two are rolled, a second movie may be rented for $0.22. Let X represent the amount paid for a second movie on roll-the-dice day. The expected value of X is $0.47 and the standard deviation of X is $0.15
Answer:
0.14
Step-by-step explanation:
Given that :
Expected value = 0.47
Standard deviation = 0.15
Sample size, n = 30
The mean = expected value * sample size
Mean = 0.47 * 30 = 14.1
Standard deviation of sample = σ / √n
0.15 = σ/√30
σ = 0.8216
P(x > 15) :
Z = (x - mean) /standard deviation
Z = (15 - 14.1) / 0.8216 = 1.095
P(Z > 1.095) = 0.1367
P(Z > 1.095) = 0.14
I have an average of 84 right now but I failed my homework so that would most likely turn to an 82 and my parents will actually kill me I need to get to at least an average of 90 minimum I know report cards will be out soon and I will guess I have a week before marking period three ends could I boost my average up by 6-8% within a week of getting straight hundreds in my homework? Homework’s count a lot.
Answer:
I would say yes. Now I'm not in your type of school grading system, but if you try to get as many 90s and 100s in your homework for the next week, you would probably get there.
Step-by-step explanation:
Good luck! I know you will do great.
A jar contains 6 red marbles, 3 green marbles, 5 white marbles, and 7 yellow marbles. Find the probability of drawing a green marble. All answers should be given as a fraction in simplest form!
Any help is appreciated! Thanks!
Answer:
simple - 1/21 chance
Step-by-step explanation:
since its asking for the probability of "a" marble, and not all the green marbles, you add everything up and slap what outcome (1 in this case) on top of the 21
here is cat
Answer:
3 is for green marbles
21 is the total of all marbles
Step-by-step explanation:
you only have 1 event so I think we don't need some formula or something
the formula is this if the event A and B has no intersection P( A U B)= P(A)+P(B)
and if it has intersection, the formula is like this P( A ∩ B)=P(A)+P(B)-P( A ∩ B)
PLEASE HELPPPP THE DROP DOWN MENUES ARE ALL THE SAME
Answer:
a) distributive property
b) combining like terms
c) commutative property of addition
Two linear functions are described below.
Function 1 has the equation y = - 2x + 4.
Function 2 is a line passing through the points (0, 4) and (8,0).
Which of the following statements are true? Select one that applies.
Answer:
c
Step-by-step explanation:
Can someone help me with this question please?!
Answer:
H. $26
Step-by-step explanation:
$6.50 x 4 = 26. The cost is exact.
+
Find the missing side to the nearest tenth 23 and 19
177 ×44 Please hurry but take your time
Answer:
7788
Step-by-step explanation:
177 x 44 is 7788
Answer:
7788
Step-by-step explanation:
177
x44
-------
708
708x
-----------
7788
Which fraction is
equivalent to 1/8
What about 2/16?
We can reduce 2/16 to 1/8.
What is the radius?
Find the length of the radius of the circle with an equation of
(x + 3)2 + (y-7)2 = 289.
Answer:
Radius = 17.
Step-by-step explanation:
If(h,k) is centre and rradius, the eqn. of circle is :(−x h)2+(y−k)2=r2
Comparing with the given eqn. of circle, we find, r2=289 Hence, radius is 17
There are two bags of oranges on sale. The prices are shown below: Bag A: $2400 containing 12 oranges Bag B: $3000 containing 20 oranges Which is the better buy?
Answer:
Bag B which is $150 for one orange
Step-by-step explanation:
In ,bag A 12 oranges cost 2400
The price of one orange in bag A is
= 2400/12
= $200
In bag B 20 oranges cost $3000
The cost of one orange in bag B is
= 3000/20
= $150
Hence the better buy is bag B which goes for $150 for one orange
What is the sales tax of a $15.95 video game if the tax rate is 7%
Answer:
$17.07
Step-by-step explanation:
Step 1: Find the percent of the price
Convert 7% to fraction
[tex]= \frac{7}{100}\\\\=\frac{7}{100}\times \:15.95[/tex]
Multiply
[tex]=\frac{7\times \:15.95}{100}[/tex]
Multiply the factors
[tex]7\times \:15.95=111.65\\\\=\frac{111.65}{100}[/tex]
Divide
[tex]\frac{111.65}{100}=1.1165\\\\=1.1165[/tex]
Step 2: Add the percent off to the original price
[tex]15.95 + 1.1165\\\\= 17.0665[/tex]
Therefore, the total cost including tax in the nearest cent is 17.07 dollars
Find the arch length
(Give an exact answer & show work)
Answer:
12.56637
Step-by-step explanation:
[tex]Arc length = 2\pi r(\frac{0}{360}) \\Arc lenght = 2\pi 6(\frac{120}{360} )[/tex]
how many cups is 5 1/8 gallons
Answer:
82 Cups
Step-by-step explanation:
Find the equation of a straight
line passing through the point of
intersection of the lines
y = 2x +3 and x +y = 3 and
parallel to the line y = -5x +7
Answer:
y = -5x + 3.
Step-by-step explanation:
We can find the point of intersection by solving the system:
y = 2x + 3 .... 1
x + y = 3 ...... 2 from this:
y = 3 - x ....... .3
Equating equations 1 and 3:
2x + 3 = 3 - x
3x = 0
x = 0 so y = 2(0) + 3 = 3.
So the point of intersection is (0, 3).
So the required equation has slope -5 and passes through (0, 3) and, using the point-slope form of a straight line, we have:
y - 3 = -5(x - 0)
y - 3 = -5x
y = -5x + 3.
Q.3 Learn and write squares and cubes of numbers from 2 to 25 (2 times). Ex- = 2 x 2 = 4 = 2 x 2 x 2 = 8 = 3 x 3 = 9 = 3 x 3 x 3 = 27
Answer:
The squares and cubes values can be defined follows:
Step-by-step explanation:
[tex]Number \ \ \ \ \ \ \ \ \ \ \ \ Squares \ \ \ \ \ \ \ \ \ \ \ \ Cubes\\\\[/tex]
[tex]1\ \ \ \ \ \ \ \ \ \ \ \ 1\ \ \ \ \ \ \ \ \ \ \ \ 1 \\\\2\ \ \ \ \ \ \ \ \ \ \ \ 4\ \ \ \ \ \ \ \ \ \ \ \ 8\\\\ 3\ \ \ \ \ \ \ \ \ \ \ \ 9 \ \ \ \ \ \ \ \ \ \ \ \ 27\\\\ 4 \ \ \ \ \ \ \ \ \ \ \ \ 16\ \ \ \ \ \ \ \ \ \ \ \ 64\\\\ 5\ \ \ \ \ \ \ \ \ \ \ \ 25\ \ \ \ \ \ \ \ \ \ \ \ 125\\\\ 6\ \ \ \ \ \ \ \ \ \ \ \ 36\ \ \ \ \ \ \ \ \ \ \ \ 216\\\\ 7\ \ \ \ \ \ \ \ \ \ \ \ 49\ \ \ \ \ \ \ \ \ \ \ \ 343 \\\\8\ \ \ \ \ \ \ \ \ \ \ \ 64\ \ \ \ \ \ \ \ \ \ \ \ 512\\\\[/tex]
[tex]9\ \ \ \ \ \ \ \ \ \ \ \ 81 \ \ \ \ \ \ \ \ \ \ \ \ 729\\\\ 10\ \ \ \ \ \ \ \ \ \ \ \ 100 \ \ \ \ \ \ \ \ \ \ \ \ 1000\\\\11\ \ \ \ \ \ \ \ \ \ \ \ 121\ \ \ \ \ \ \ \ \ \ \ \ 1331 \\\\12\ \ \ \ \ \ \ \ \ \ \ \ 144\ \ \ \ \ \ \ \ \ \ \ \ 1728\\\\13 \ \ \ \ \ \ \ \ \ \ \ \ 169\ \ \ \ \ \ \ \ \ \ \ \ 2197 \\\\14\ \ \ \ \ \ \ \ \ \ \ \ 196 \ \ \ \ \ \ \ \ \ \ \ \ 2744\\\\ 15\ \ \ \ \ \ \ \ \ \ \ \ 225 \ \ \ \ \ \ \ \ \ \ \ \ 3375\\\\ 16 \ \ \ \ \ \ \ \ \ \ \ \ 256 \ \ \ \ \ \ \ \ \ \ \ \ 4096 \\\\[/tex]
[tex]17\ \ \ \ \ \ \ \ \ \ \ \ 289\ \ \ \ \ \ \ \ \ \ \ \ 4913\\\\ 18\ \ \ \ \ \ \ \ \ \ \ \ 324\ \ \ \ \ \ \ \ \ \ \ \ 5832\\\\ 19\ \ \ \ \ \ \ \ \ \ \ \ 361\ \ \ \ \ \ \ \ \ \ \ \ 6859\\\\ 20\ \ \ \ \ \ \ \ \ \ \ \ 400 \ \ \ \ \ \ \ \ \ \ \ \ 8000 \\\\21\ \ \ \ \ \ \ \ \ \ \ \ 441\ \ \ \ \ \ \ \ \ \ \ \ 9261\\\\ 22\ \ \ \ \ \ \ \ \ \ \ \ 484 \ \ \ \ \ \ \ \ \ \ \ \ 10648\\\\ 23 \ \ \ \ \ \ \ \ \ \ \ \ 529\ \ \ \ \ \ \ \ \ \ \ \ 12167\\\\[/tex]
[tex]24 \ \ \ \ \ \ \ \ \ \ \ \ 576 \ \ \ \ \ \ \ \ \ \ \ \ 13824 \\\\25\ \ \ \ \ \ \ \ \ \ \ \ 625 \ \ \ \ \ \ \ \ \ \ \ \ 15625[/tex]