Given 250 mL of HCl HCI at 65% concentration how many milliliters of pure HCl are in the mixture? Help please

Answer:

D

Step-by-step explanation:

Given the 2 equations

2x - 3y = 14 → (1)

5x + 3y = 21 → (2)

Adding the 2 equations term by term will eliminate the y - term

(5x + 2x) + (- 3y + 3y) = (14 + 21)

7x = 35 ( divide both sides by 7 )

x = 5 → D

[tex]P(A)=0.995\\P(A')=0.005[/tex]

So [tex]P(A')[/tex] is pretty much unlikely.

Answer:

Its B ''In Step 2, she divided 8 by 100 instead of 100 by 8, so she cannot multiply the numerator by the factor.''

Hence, in step [tex]2[/tex] she did the mistake.

What is the multiplication?

Multiplication is a method of finding the product of two or more numbers. It is one of the basic arithmetic operations, that we use in everyday life.

Here given that,

Step 1: [tex]\frac{1}{8}=\frac{?}{100}[/tex]

Step 2: [tex]8[/tex] divided by [tex]100 = 0.08[/tex]

Step 3: [tex]0.08[/tex] multiplied by [tex]1 = 0.08[/tex]

Step 4: [tex]0.08[/tex]

She did the mistake in step [tex]2[/tex] it would be,

[tex]\frac{100}{8}=12.5[/tex]

Hence, in step [tex]2[/tex] she did the mistake.

To know more about the multiplication

https://brainly.com/question/5992872

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Answer:

None.

Step-by-step explanation:

5/a - 2 / (1 - a) = 2 (a - 1)

Multiply each term by  a(1 - a)(a - 1):

5 (1 - a)(a - 1) - 2a(a - 1)  = 2a(1 - a)

5( a - 1 - a^2 + a)  - 2a^2 + 2a = 2a - 2a^2

5(-a^2 +  2a  - 1) - 2a^2 + 2a = 2a - 2a^2

-5a^2 + 10a - 5 - 2a^2 + 2a - 2a + 2a^2 = 0

-5a^2 + 10a - 5 = 0

-5(a^2 - 2a + 1) = 0

= -5(a - 1)^2 = 0

So a = 1.

But a = 1 cannot be a root because 2/ 1 - a would be 2/0 which is undefined.

Also 2 / (a - 1) is undefined.

Answer:1 out of 13

Step-by-step explanation:

because you take both of them and add them together and if one gets a banana and the other one gets an orange that will be one out of thirteen

Answer:

  B)  one solution

Step-by-step explanation:

The ratio of x-coefficient to y-coefficient is different in the two equations, so the lines have different slopes. Two lines with different slopes will always have exactly one point of intersection. You don't need to graph the equations to know there is ...

  one solution

__

A graph is attached. As it happens, the two lines are perpendicular. The solution is (2, 0).

Mean means average.

To find the average, add the data then divide it by the amount of individual data you have.

(6.5 + 5 + 3 + 2 + 2 + 3.5 + 5)/2 = mean

27/2 = mean

13.5 = mean

13.5 miles is the mean distance that Jim jogged.

Answer:

Length: 13 feet,

Width: 4 feet.

Step-by-step explanation:

Let w represent width of bulletin board.

We have been given that the length is 3 feet less than 4 times the width. So the length of the bulletin board would be [tex]4w-3[/tex].

We have been given the area of a bulletin board is 52 square feet. We know that a bulletin board is in form of rectangle, so its area would be length times width.

We can represent this information in an equation as:

[tex]w(4w-3)=52[/tex]

Let us solve for w.

[tex]w(4w-3)=52[/tex]

[tex]4w^2-3w=52[/tex]  

Use quadratic formula:

[tex]w=\frac{-(-3)\pm\sqrt{(-3)^3-4\cdot 4\cdot (-52)}}{2\cdot 4}[/tex]

[tex]w=\frac{3\pm\sqrt{9+832}}{8}[/tex]

[tex]w=\frac{3\pm\sqrt{841}}{8}[/tex]

[tex]w=\frac{3\pm29}{8}[/tex]

[tex]w=\frac{3-29}{8}\text{ (or) }w=\frac{3+29}{8}[/tex]

[tex]w=\frac{-26}{8}\text{ (or) }w=\frac{32}{8}[/tex]

[tex]w=\frac{-13}{4}\text{ (or) }w=4[/tex]

Since width cannot be negative, therefore, width of the bulletin board is 4 feet.

Substitute [tex]w=4[/tex] in expression [tex]4w-3[/tex] to find length of bulletin board.

[tex]4w-3\Rightarrow 4(4)-3=16-3=13[/tex]

Therefore, length of the bulletin board is 13 feet.

Answer:

29; 30

Step-by-step explanation:

1. To the nearest whole number.

Whole numbers are numbers like 27, 28, 29, and 30.

A is between 28 and 29, but it is closer to 29.

To the nearest whole number, A = 29.

2. To the nearest 10

The tens are numbers like 10, 20, 30, and 40.

A is between 20 and 30, but it is closer to 30.

To the nearest ten, A = 30.

Answer:

h(8q²-2q) = 56q² -10q

k(2q²+3q) = 16q² +31q

Step-by-step explanation:

1. Replace x in the function definition with the function's argument, then simplify.

h(x) = 7x +4q

h(8q² -2q) = 7(8q² -2q) +4q = 56q² -14q +4q = 56q² -10q

__

2. Same as the first problem.

k(x) = 8x +7q

k(2q² +3q) = 8(2q² +3q) +7q = 16q² +24q +7q = 16q² +31q

_____

Comment on the problem

In each case, the function definition says the function is not a function of q; it is only a function of x. It is h(x), not h(x, q). Thus the "q" in the function definition should be considered to be a literal not to be affected by any value x may have. It could be considered another way to write z, for example. In that case, the function would evaluate to ...

h(8q² -2q) = 56q² -14q +4z

and replacing q with some value (say, 2) would give 196+4z, a value that still has z as a separate entity.

In short, I believe the offered answers are misleading with respect to how you would treat function definitions in the real world.

Answer:its a. 5,000,000

Step-by-step explanation:

Final answer:

Option a, 5,000,000 nanometers, is the correct choice as it does not equate to 50 millimeters; it equates to 5 millimeters instead, making it not equal to the other options listed.

Explanation:

The question asks which of the provided options is not equal to 50 millimeters. We can convert each option to see which one does not equal 50 mm:

a. 5,000,000 nanometers (nm) - This equates to 5,000,000 nm × 1 m / 1,000,000,000 nm = 0.005 m or 5 mm, which is not equal to 50 mm.

b. 0.05 meters (m) - This is equal to 0.05 m × 1000 mm / 1 m = 50 mm, which is equal to 50 mm.

c. 5 centimeters (cm) - This is equal to 5 cm × 10 mm / 1 cm = 50 mm, which is equal to 50 mm.

d. 50,000 micrometers (µm) - As 1 µm is 1/1000 mm, this is equal to 50,000 µm × 1 mm / 1000 µm = 50 mm, which is equal to 50 mm.

Therefore, the correct answer is a. 5,000,000 nanometers, as it is the only option that does not equate to 50 mm.

For this case we have that the area of the kite is given by the area of two triangles, the triangles share the same base of 2 + 2 = 4. One of the triangles has height of 6 and the other has height of 7.

So, the total area is given by:

[tex]A = \frac {1} {2} * 4 * 6 + \frac {1} {2} * 4 * 7\\A = \frac {1} {2} 24+ \frac {1} {2} 28\\A = 12 + 14\\A = 26[/tex]

So, the kite area is 26

ANswer:

Option D

Answer:

it's definitely a positive nonlinear graph

Step-by-step explanation:

Answer:

To better understand the data you're working with

Step-by-step explanation:

Note that, the sample is a subset of your whole population (population here is a general definition, it could be a population of cars for example), which means that if you want to understand your population your best "bet" would be using a sample to try to estimate some unknown characteristics of your population. Let's suppose you want to estimate the true mean of your population, then you would need a sample, and if this sample is big enough you could approximate the estimative to the true mean.

It's hard to say exactly what this survey could mean, but the general idea is to understand your data a little more, see if there is any pattern, if a certain value occurs more than others, to calculate the sample mean, median and standard deviation, and so on...

Hope it helped!

Answer:

For b, the answer is that your trying to find out what the type of funtion may be. It could be either exponential, linear, or quadratic.

Step-by-step explanation:

That's what the lesson in edg is all about.

The three-dimensional figure that is formed by the rotation is (a) an hemisphere

From the figure, we can see that the line is rotated along the y-axis.

And the length of rotation reduces as the rotation moves downward

This rotation would create an hemisphere

The option (a) represents an hemisphere

Hence, the three-dimensional figure that is formed by the rotation is (a) an hemisphere

Read more about rotation at:

https://brainly.com/question/4289712

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Answer:

Option C) [tex]0 \leq x \leq 9[/tex]

Step-by-step explanation:

We are given the following information in the question:

The number of users of a cell tower  increased by a factor of 1.5 every year from 2010 to 2019.

[tex]f(x) = 5000(1.5)^x[/tex]

where f(x) is the number of cell tower users and x is the years from the year 2010.

We have to find the domain for the given function.

Domain of a function is defined as the possible values of x the function can take, so that the function is defined.

Since this function gives the number of cell users from 2010 to 2019, thus, it is applicable from year 2010 to 2019.

x takes the value of years after 2010.

Thus  for year 2010, x = 0 and for year 2019, x = 9

Thus, the domain of the given function is given by:

[tex]0 \leq x \leq 9[/tex]

Answer:

5.25 miles - 3 miles = 2.25 miles

2.25 miles is the extra miles.

2.25 miles x $1.20 = $2.7

Total:

$2.7 + ($1.5 x 3 miles)

=$2.7 + $4.5

=$7.2

5.5 miles will cost $2.7.

Answer:

Step-by-step explanation:

Let [tex]u^2=x^4\\u = x^2[/tex]

Subbing in:

[tex]9u^2-2u-7=0[/tex]

a = 9, b = -2, c = -7

The product of a and c is the aboslute value of -63, so a*c = 63.  We need 2 factors of 63 that will add to give us -2.  The factors of 63 are {1, 63}, (3, 21}, {7, 9}.  It looks like the combination of -9 and +7 will work because -9 + 7 = -2.  Plug in accordingly:

[tex]9u^2-9u+7u-7=0[/tex]

Group together in groups of 2:

[tex](9u^2-9u)+(7u-7)=0[/tex]

Now factor out what's common within each set of parenthesis:

[tex]9u(u-1)+7(u-1)=0[/tex]

We know this combination "works" because the terms inside the parenthesis are identical.  We can now factor those out and what's left goes together in another set of parenthesis:

[tex](u-1)(9u+7)=0[/tex]

Remember that [tex]u=x^2[/tex]

so we sub back in and continue to factor.  This was originally a fourth degree polynomial; that means we have 4 solutions.

[tex](x^2-1)(9x^2+7)=0[/tex]

The first two solutions are found withing the first set of parenthesis and the second two are found in other set of parenthesis.  Factoring [tex](x^2-1)[/tex] gives us that x = 1 and -1.  The other set is a bit more tricky.  If

[tex]9x^2+7=0[/tex] then

[tex]9x^2=-7[/tex] and

[tex]x^2=-\frac{7}{9}[/tex]

You cannot take the square root of a negative number without allowing for the imaginary component, i, so we do that:

[tex]x=[/tex]±[tex]\sqrt{-\frac{7}{9} }[/tex]

which will simplify down to

[tex]x=[/tex]±[tex]\frac{\sqrt{7} }{3}i[/tex]

Those are the 4 solutions to the quartic equation.

Answer:

[tex]d =\sqrt{(b-0)^2 +(c-a)^2}[/tex]

Step-by-step explanation:

We know that the distance between two points is calculated using the following formula

[tex]d =\sqrt{(x_2-x_1)^2 +(y_2-y_1)^2}[/tex]

In this case we look for the RS distance

Then

The starting point is: (0, a)

The final point is (b, c)

So

[tex]x_2 = b\\x_1 = 0\\y_2 = c\\y_1=a[/tex]

The distance is:

[tex]d =\sqrt{(b-0)^2 +(c-a)^2}[/tex]

Answer:

Jamie spent $39.36 in total.

Step-by-step explanation:

First, add the money spent for the sandwich, beverage, and fruit together.

4.75 + 1.25 + .56 = 6.56

Then, multiply the amount spent for one friend by six to find the total.

6.56 x 6 =39.36

I hope this helped you!

Hello There!

In an experiment, The independent variable is the variable that the person doing the experiment changes on purpose so they can see if it affects another variable in the experiment. Independent variables are also called "The Manipulated Variables"

I Hope This Helped You!

Have Great Day!

Be Safe,

TheBlueFox

Answer:

[tex]14\ miles[/tex]

Step-by-step explanation:

Let

[tex]A(-2, 2), B(1, 2), C(1, -2),D(-2, -2)[/tex]

Plot the coordinates

see the attached figure

we know that

The perimeter is equal to

[tex]P=2(AB+AD)[/tex]

we have

[tex]AB=(1-(-2))=3\ units[/tex]

[tex]AD=(2-(-2))=4\ units[/tex]

substitute

[tex]P=2(3+4)=14\ units[/tex]

Convert to miles

If each unit represents 1 mile

then

[tex]14\ units=14\ miles[/tex]

Answer:

15 units sq

Step-by-step explanation:

Good job

Answer:

120*pi in^3

Step-by-step explanation:

We are given

Radius of cone=r=6 in

Height of cone=h=10 in

We know that the formula for finding the volume of cone is:

[tex]V=\frac{1}{3}\pi *(r)^{2}*h[/tex]

Putting the values of radius and height:

[tex]V=\frac{1}{3}\pi *(6)^{2}*10\\=\frac{1}{3}\pi *36*10\\=\frac{360}{3}\pi\\=120\pi[/tex]

So, the volume of cone in terms of pi is 120pi cubic in^3 ..

Answer:

The volume of cone = 120π cubic inches

Step-by-step explanation:

Points to remember

Volume of cone = (πr²h)/3

Where r - Radius of cone and

h - Height of cone

To find the volume of cone

Here r = 6 in and h = 10 in

Volume = (πr²h)/3

 = (π * 6² * 10)/3

 = (π * 36 * 10)/3

 = 360π/3

 = 120π cubic inches

Therefore volume of cone = 120π cubic inches

If we want to find when the population of species A will be equal to the population of species B, we need to see when the two equations for the population of each species are equal, ie. equate them and solve for t. Thus:

2000e^(0.05t) = 5000e^(0.02t)

(2/5)e^(0.05t) = e^(0.02t) (Divide each side by 5000)

2/5 = e^(0.02t) / e^(0.05t) (Divide each side by e^(0.05t))

2/5 = e^(-0.03t) (use: e^a / e^b = e^(a - b))

ln(2/5) = -0.03t (use: if b = a^c, then loga(b) = c )

t = ln(2/5) / -0.03 (Divide each side by -0.03)

= 30.54 (to two decimal places)

Therefor, the population of species A will be equal to the population of species B after 30.54 years.

I wasn't entirely sure about the rounding requirements so I've left it rounded to two decimal places.

Answer:

At t = 1s, The instantaneous velocity will be -9

Step-by-step explanation:

The position is given by

s(t) = -8 - 9t

If we find the derivative, we get the expression for the velocity

d(s(t))/dt = v(t) = -9

The velocity of the object is constant.

At t = 1s, it will be -9

Answer:

3/4

Step-by-step explanation:

a1 = (-1/3)^0 = 1

r = -1/3

Hence S = 1/(1+1/3) = 1/(4/3) = 3/4

Answer:

0.75.

Step-by-step explanation:

The common ratio = -1/3 and the first term = (-1/3)^0 = 1.

Sum to infinity =  1 / (1 - (-1/3))

= 1 / 4/3

= 3/4

= 0.75.

[tex]{_{15}C_{11}}\cdot {_{11}C_2}=\dfrac{15!}{11!4!}\cdot\dfrac{11!}{2!9!}=\dfrac{12\cdot13\cdot14\cdot15}{2\cdot3\cdot4}\cdot\dfrac{10\cdot11}{2}=75,075[/tex]

Answer: There are 715 ways to choose his starting lineup which includes designating the two captions.

Step-by-step explanation:

Since we have given that

Number of members = 15

Number of players = 11

Number of captions must be included = 2

So, Number of remaining members = 15-2 = 13

Number of remaining players = 11 - 2 = 9

So, Number of ways to choose starting line up is given by

[tex]^{13}C_9\\\\=715[/tex]

Hence, there are 715 ways to choose his starting lineup which includes designating the two captions.

Answer:

  $28

Step-by-step explanation:

Put the given value into the formula and do the arithmetic.

  p(15) = -2(15 -9)^2 +100

  = -2(6^2) +100

  = -72 +100

  = 28

The profit on T-shirts selling for $15 would be $28.

Answer:

B -$28

Step-by-step explanation: