Mathematics High School

A certain drug is made from only two ingredients: compound a and compound
b. there are 7 milliliters of compound a used for every 4 milliliters of compound
b. if a chemist wants to make 748 milliliters of the drug, how many milliliters of compound b are needed?

Answers

Answer 1
272, i just kept on adding 7 and 4 equally untill i got 748 and figured out you need 272 b and if it asks for a, the answer is 476

Related Questions

If the cos of angle x is 8/17 and the triangle was displayed to be two times big as the original what would be the value of the cos of x for the dilated triangle

Answers

Answer: The value of cos(x) of the dilated triangle would be exactly the same as in the first triangle, cos(8/17).

The cosine ratio is a ratio of two sides. 

In the first triangle the ratio is 8/17.

In the second triangle the ratio is 16/34. This could be reduced back to 8/17 which would produce the same cosine value.

The value of cos of angle x of the dilated triangle would be exactly the same as in the first triangle cos (8/17).

How does dilation work?

Dilation of a figure will leave its sides get scaled (multiplied) by same number. That number is called the scale factor of that dilation.

Its also called scaling of a figure, but due the involvement of coordinates, it involves a center of a dilation, which is like a pinned point which stays at same place after dilation.

Its like we enlarge or shorten the size of the figure (or keep it same, when scale factor = 1)

The cosine ratio is a ratio of the two sides.

We have been given If the cos of angle x is 8/17 and the triangle was displayed to be two times big as the original.

In the first triangle, the ratio is 8/17.

In the second triangle, the ratio is 16/34.

The second triangle could be reduced back to 8/17 which produces the same cosine value.

Learn more about dilation ;

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4.02 Congruent Triangles, doess anyone have tips on how to do this? im getting confused with the SSS, SSA , SAS

Answers

SSS is side side side so all the sides have to be congruent for the triangles to be congruent.

SSA is side side angle so two sides and an angle needs to be congruent for the triangles to be congruent.

SAS is side angle side so two sides and an included triangle need to be congruent for the triangles to be congruent.

Hope that helps:)

need help ASAP

Noah has 3 3/4 quarts of motor oil. He puts 1/2 that amount into a riding lawn mower.



How much oil does Noah put into the riding lawn mower?
Express your answer in simplest form.

Answers

He used 15/2 or 7 1/2 quarts of oil

Please, help me. I'm not sure what to do.
Factor completely: 8x5 + 28x4 + 12x3
A) 2x3(2x + 6)(x + 1)
B) 2x3(2x - 6)(x - 1)
C) 4x3(2x + 1)(x + 3)
D) 4x3(2x - 1)(x - 3)

Answers

answer is d, its simple....

Helpp The Line Segment AB has endpoints at A(5,-3) and B(-2,0)

Answers

check the picture below, notice the red reflected image over the x-axis.

jason built a rectangular tool shed that is 8 meters wide and has an area of 96 square meters what is the length of Jason's tool shed? meters

Answers

Area = length x width
96 = length x 8
Length =96/8
Length = 12 metres

What is the quotient?
3x^2 – 11 + 60/x+5
3x – 11 + 60/x+5
3x^2 – 11 – 50/x+5
3x – 11 – 50/x+5

Answers

correct answer 3x – 11 + 60/x+5

Answer:

correct answer 3x – 11 + 60/x+5

Step-by-step explanation:

What is the value of t?

Answers

[tex] I = Prt [/tex]

Divide both sides by P and r.

[tex] t = \dfrac{I}{Pr} [/tex]

Answer is: Choice D.

Why is it advantages to take market trends into consideration when planning a career path?

Answers

It is very important. In the future, things change. Some jobs won't be needed anymore. Jobs like travel agents won't be needed because of technology.

Answer:

Its important because history repeats its self. some jobs won't be available in 5-10 years due to advance in technology, or a job that is fruitful/ profitable in one year may be completely dead and dry in the next.

Step-by-step explanation:

Jeremy is going to roll a fair 6-sided die 180 times. What is the best prediction for the number of times that Jeremy will roll a number greater than 4?

Answers

around 66 times i belive its right you might have to round up a little 

Answer:

Step-by-step explanation:Close to 60 times but probably not exactly 60 times

PLEASE HELP ASAAPPPP <3

Answers

the answer is B because 1.02 is 100% (maintaining the population) and 2% (growth) in decimal form.
since it is changing 2 percent every year it is in additionally 2 perecent being added to 100 so it will be 100%+7 (2)%×9,800. First multiply 7 and 2 which gives you 14 then add 100 and 14 and you get 114 percent then multiply 9,800 by 114 percent and you will be ur answer which is 11,172. when multiply with 114 and 9800 take off the zeros to your final answer.

Which of the following points lie in the solution set to the following system of inequalities?

y ≤ x − 5
y ≤ −x − 4
(1, 10)
(−1, 10)
(10, 1)
(1, −10)

Answers

Only the point (1, -10) lies in the solution set.
Hi,
The answer is (1,-10)

30pts, will give brainliest.

Answers

You could rewrite the second equation as either of the two options:

-3x + 9y = 18 or -4x +12y = 24

Both of these would make one of the variables cancel out when adding together. 

Answer:

the answer is 24

I don't know if this is right... please someone help mee

Answers

for the first circle, let's use the pythagorean theorem

[tex]\bf \textit{using the pythagorean theorem}\\\\ c^2=a^2+b^2\implies c=\sqrt{a^2+b^2} \qquad \begin{cases} c=hypotenuse\\ a=adjacent\\ b=opposite\\ \end{cases} \\\\\\ c=\sqrt{8^2+15^2}\implies c=\sqrt{289}\implies c=17[/tex]

now, it just so happen that the hypotenuse on that triangle, is actually 17, but we used the pythagorean theorem to find it, and the pythagorean theorem only works for right-triangles.

 so if the hypotenuse is actually 17, that means that triangle there is actually a right-triangle, meaning that the radius there, and the outside line there, are both meeting at a right-angle.

when an outside line touches the radius line, and they form a right-angle, the outside line is indeed a tangent line, since the point of tangency is always a right-angle with the radius.



now, let's check for second circle

[tex]\bf \textit{using the pythagorean theorem}\\\\ c^2=a^2+b^2\implies c=\sqrt{a^2+b^2} \qquad \begin{cases} c=hypotenuse\\ a=adjacent\\ b=opposite\\ \end{cases} \\\\\\ c=\sqrt{11^2+14^2}\implies c=\sqrt{317}\implies c\approx 17.8044938[/tex]

well, low and behold, we didn't get our hypotenuse as 16 after all, meaning, that triangle is NOT a right-triangle, and that outside line is not touching the radius at a right-angle, therefore is NOT a tangent line.



let's check the third circle

[tex]\bf \textit{using the pythagorean theorem}\\\\ c^2=a^2+b^2\implies c=\sqrt{a^2+b^2} \qquad \begin{cases} c=hypotenuse\\ a=adjacent\\ b=opposite\\ \end{cases} \\\\\\ c=\sqrt{33^2+56^2}\implies c=\sqrt{4225}\implies c=\stackrel{33+32}{65}[/tex]

this time, we did get our hypotenuse to 65, the triangle is a right-triangle, so the outside line is indeed a tangent line.

what is the solution of the following system?
4x-y=15
3x+2y=-8

(-1,-19)
(2,-7) <--- is this the right answer?
(4,-5)
(5,5),

Answers

4x-y = 15 3x+2y = -8 Multiplying the first equation by two makes for an easy elimination of the y variable. 8x - 2y = 30 3x + 2y = -8 Add vertically. 11x = 22. Divide by 11 on both sides and get x = 2. Plug into an equation. 4(2) - y = 15 8 - y = 15 8 = 15 + y 8 - 15 = y -7 = y. Thus the solution is indeed (2, -7).

For which polygon is the sum of the interior angles equal to 720 degrees?
A. Quadrilateral
B. Hexagon
C. Octagon

Answers

The answer to this is Hexagon.

William had $45 dollars to spend on vegetables. After buying 6 watermelons, he had $25.50 left. How much did each watermelon cost?

Answers

45-25.50 = 19.50 spent
19.5 / 6 = 3.25 per watermelon

Let us suppose cost of 1 watermelon be x.

Cost of 6 watermelons = 6x.

It is given after buying 6 watermelons, he had $25.50 left.Total amount William spends on vegetable is $45.

We can form an equation with above information's

6x+25.50=45

To solve for x we isolate the x term .25.50 is added to the x term .

Opposite of addition is subtraction .Subtracting 25.50 both sides we have:

6x=45-25.50

6x=19.50

Dividing both sides by 6

x=3.25.

Cost of each watermelon is $3.25.


place the following steps in order to complete the square and solve the quadratic equation,x^2+7=0

Answers

x^2+7=0
this can be written as:
x^2+0x+7=0
To solve using completer square we proceed as follows:
x^2+0x=-7
but
c=(b/2a)^2
c=(0/2*1)^2=0
hence
x^2+0x+0=-7+0
this will be simplified as:
x^2=-7
getting the square root of both sides gives us:
sqrt(x^2)=sqrt(-7)
x=+/-√-7
but √-1=i
hence our answer will be:
x=+/-7i

Chord AC intersects chord BD at point P in circle Z.

AP=3.5 in.
DP=4 in.
PC=6 in.



What is BP?

Enter your answer as a decimal in the box.

Answers

1. To solve this exercise, you must use the "Intersecting chords theorem".

2. You have that:

AP=3.5 in
PC=6 in
DP=4 in

3. Then, by applying the "Intersecting chord theorem", you have:

(AP)(PC)=(BP)(DP)

4. When you substitute the values into (AP)(PC)=(BP)(DP), you obtain:

(3.5 in)(6 in)/BP(4 in)

5. Now, you must clear BP. Then:

(3.5 in)(6 in)/4 in=BP
21 in^2/4 in=BP

6. Therefore, the value of BP is:

BP=5.25 in

Diego cut 7 smaller boards of equal length from a board that is 9 1/3 feet long. How long is each of the 7 smaller boards? Write your answer as an improper fraction using the / symbol for the fraction.

Answers

It would be 9 1/3 divided by 7/1 or 28/3 * 1/7

It would give you 28/21 which would simplify to 4/3 and still leave you with an improper fraction

PLEASE HELP ME !!!!!!!!!!!!!!!!!
LET ME KNOW IF ITS RIGHT

Answers

Okay. So the song lasts 221 seconds. 45 seconds have already beem done and 22 seconds is done in an hour. The equation would be set up like this:

45 + 22h = 221

Just by looking at the answer choices, A is already eliminated because it doesn't incorportate the 45 seconds. B does include the 45 seconds, but it subtracts, and in this case, we add time, not subtract. D is eliminated, because the h variable does not go with 45. The only equation that works is C and when you solve it, you get 8 hours. The answer is C.

Note: you solve the equation above by subtract 45 from both sides to get 176 = 22x, and dividing both sides by 22 to get x = 8.

Generate the first 5 terms of this sequence:

f(1) = 0 and f(2) = 1, f(n) = f(n - 1) + f(n - 2), for n > 2.

A. 0, -1, 1, 0, 2

B. 0, 1, 1, 2, 3

C. 0, 1, 2, 2, 3

D. 0, 1, 1, 2, 2

Please helppp! Thanks! <3,

Answers

We are given f(1) = 0 and f(2) = 1. Going forward, the term is the sum of the two previous terms. f(3) = f(2) + f(1) = 0 + 1 = 1. f(4) = f(3) + f(2) = 1 + 1 = 2 f(5) = f(4) + f(3) = 2 + 1 = 3 This matches answer B.

The data in the table represents the average number of daylight hours each month in Springfield in 2015, rounded to the nearest quarter.

Jan 9.5
Feb 10.5
March 12
April 13.25
May 14.5
June 15
July 14.75
Aug 13.75
Sept 12.5
Oct 11
Nov 9.75
Dec 9.25

Write the equation that best models the data.

What is the expected number of daylight hours in March 2020? Explain.

Answers

For a better understanding of the solution provided here please go through the graph in the attachment. Please note that the solution provided here will be an approximate solution.

In the graph, the x axis is the number of months. 1 is January, 2 is February, so on and so forth.

The y axis is the expected number of daylight hours in those months. Each point has been depicted in the graph as shown.

Now, when we look at the graph we notice a pattern. The graph is nearly a cosine graph. Thus the equation that will best model the data will be an equation of the cosine form and will look like:

[tex] y=A cos(\omega t)+B [/tex]

where symbols have their usual meanings.

Let us find each term now:

We know that in December, the expected number of daylight hours is 9.25 hours. Thus, let us assume that the expected number of daylight hours in previous December was 9.25 hours too.

With this assumption let us proceed.

Amplitude=[tex] \frac{Highest - Lowest}{2} =\frac{15-9.25}{2} =2.875 [/tex]

The Vertical Shift Up is B=[tex] \frac{9.25+15}{2} = 12.125[/tex]

Also, the frequency can be calculated as: [tex] \omega=\frac{2\pi}{Period}= \frac{2\pi}{12}=\frac{\pi}{6} [/tex]

Thus, plugging in all the values, the final equation will be:

[tex] y=-2.875cos(\frac{\pi}{6}t)+12.125 [/tex]....(Equation 1)

The negative value of A suggests that the function starts below the horizontal y=12.125 line.

The above is the (Equation 1) that best models the given data.

Now, to find the expected number of daylight hours in March 2020, we just have to find the value of the time, t from January 2015 to March 2020.

Now, we know that each year has 12 months. So, 5 years from start of 2015 to end of 2019 will have 12 x 5=60 months. We need to add to this the first three months of the year 2020 to take us till March 2020. Thus, the value of t from January 2015 to March 2020 is 63.

Now, let us use the (Equation 1) to find the value of expected number of daylight in March 2020 by plugging in t=63 in it.

Thus,

Expected number of daylight in March 2020 is:

[tex] y=-2.875cos(\frac{\pi}{6}\times 63)+12.125 [/tex]

[tex] \therefore y=12.125 [/tex] hours.



Which properties justify the steps taken to solve the system?

4x+3y=25
2x+−5y=19

Drag the answers into the boxes to match each step.

Answers

step 1
Multiplication property of equality
Multiplying the second equation by -2
Step 2
Additional property of equality 
We add the two equations generated in step 1
Step 3
The division property of equality
We divide both sides of equation obtained in step 2 by 13
Step 4
Substitution property of equality
We substitute the value obtained in step 3 for y in the first equation.
Step 5
Simplify

Step 6 
Additional property of equality
We add +3 on both sides of the equation in order to have an equation with a variable x.
Step 7
Division property of equality
We divide both sides of the equation obtained to get the value of x

Answer:

hope this helps :)

The assessed value of property in Enterprise County is $196,000,000. The county supervisors feel the county needs $9,525,000 in revenue.
What is the tax rate (to 0.1 of a percent)?
5.1
4.9
4.7,

Answers

tax rate = ( $9,525,000 / $196,000,000 ) * 100% = 4.9%

Answer:

B. 4.9%.

Step-by-step explanation:

We have been given that the assessed value of property in Enterprise County is $196,000,000. The county supervisors feel the county needs $9,525,000 in revenue.

To find the tax rate we need to find $9,525,000 is what percent of $196,000,000.

[tex]\text{Tax rate}=\frac{\$9,525,000}{\$196,000,000}\times 100[/tex]

[tex]\text{Tax rate}=0.0485969387755102\times 100[/tex]

[tex]\text{Tax rate}=4.85969387755102\%[/tex]

Upon rounding our answer to nearest tenth of percent we will get,

[tex]\text{Tax rate}\approx 4.9\%[/tex]

Therefore, the tax rate is 4.9% and option B is the correct choice.

Identify whether the described situation is an example of experimental probability or theoretical probability.
a.i just flipped a coin several times and the coin landed on heads more than tails. 6 times on heads and 5 times on tails. the probability of landing on heads is 6/11.

Answers

This is experimental probability, since it is based on the outcome of an experiment.

f(x) = cot x PRE CALC HELP PLS?!

Answers

check the picture below.

is it even?  well, even functions use the y-axis as a mirror, so a pre-image on the right-side, will be a mirror of the image on the left-side, but in this case it isn't so, if you put a mirror right on the y-axis, the left-side will look a bit different.

does it have a zero at x = 0?  well, just look at the graph, is the line touching the x-axis at 0? nope.

does it have an asymptote at 0?  well, surely you can see it right there.

Compounds with high melting points have _____. (1 point)
covalent bonds
metallic bonds
ionic bonds
no chemical bonds

Answers

Melting points are determined by how much the molecules in the compound interact with the other molecules in the compound. Those that have many interactions with the other molecules have higher melting points.  
Of those listed, Ionic bonds have the most rigid interactions with other molecules so have the higher melting points.

Answer:

Melting points are determined by how much the molecules in the compound interact with the other molecules in the compound. Those that have many interactions with the other molecules have higher melting points.  

Of those listed, Ionic bonds have the most rigid interactions with other molecules so have the higher melting points.

What is the value of y?

A. Cannot be determined
B. 120
C. 60
D. 65

Answers

60, since adding all 3 up equals 180
when talking about a trianlge it has to have 3 sides adding up to 180 degress so just take 60 + 60 = 120 then 180 - 120 = 60 degrees. hope this helps! :)

A stadium that seats 35,000 is slowly filling up with fans. The game starts at four o’clock. At noon the stadium owner estimates there are 4,000 fans who have already arrived early. At one o’clock he estimates just over 11,000 fans have found their seats and they appear to be coming in at a steady rate. He knows his stadium will be more than ninety percent full by game time. Choose the function below that best models this situation and tracks attendance from Noon to game time.

A. f(x)= .90x + 4,000
B. f(x)= 7,000x + 4,000
C. f(x)= 4,000x + 4,000
D. f(x)= 11,000x + 4,000

Answers

Answer:

B. f(x) = 7000x + 4000

Step-by-step explanation:

To find the best function for this situation, we need to list down all the things that we know first.

We currently have:

35000 total seats

4000 fans

11000 fans after an hour

So that means that after an hour, we had:

11000 fans - 4000 fans = 7000 fans

At one o'clock we had 7000 more fans arrive.

So we can assume that:

x = number of hours

f(x) = 7000x + 4000 will be the best function to use to find out if there that 90% of the stadium will be filled by game time.

To test this function let's use it:

f(1) = 7000(1) + 4000

f(1) = 11000

This is after hour 1.

Now let's see after hour 4 since the game starts at 4.

f(4) = 7000(4) + 4000

f(4) = 28000 + 4000

f(4) = 32000

So 90% of 35000 is:

35000 x 0.90 = 31500

By game time we have 32000 fans which is above 90% of the total number of seats.

So the stadium owners estimate is correct.

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Check all that apply. a home insurance salesman decides to start selling home warranties instead a farmer decides to start practicing real estate and selling local land a biology teacher moves to teach the elective cooking classes for that school year a factory worker who manufactures linens moves to a new factory that manufactures pencils a crab fisherman decides to start a business maintaining local boats during the rice of industrialization in the 1840s the majority of immigrants come from (Will Upgrade "AGAIN")Sound travels faster in a solidliquidgasvacuum Which passage from Kennedys inaugural address is a metaphor? And let every other power know that this Hemisphere intends to remain the master of its own house. To our sister republics south of our border, we offer a special pledgeto convert our good words into good deeds . . . . For only when our arms are sufficient beyond doubt can we be certain beyond doubt that they will never be employed. Let us never negotiate out of fear. But let us never fear to negotiate. how can countries promote economic growth during periods of high unemployment Someone please help, will mark brainiest! Create your own ending for the story. Read the story beginning, write your own ending! . You will be graded on accuracy of information, correct use of vocabulary, accuracy of structures and appropriateness of expression. Make sure to include at least 5 sentences.Slide 1Qu le pas a Francisco? Slide 2Francisco trabaja tres das a la semana en Wal-Mart. Se levant hoy con fiebre y tiene tos. Est preocupado porque el mes pasado falt tres das y el jefe le dijo: Si faltas otra vez pierdes el trabajo. Slide 3Francisco necesita el dinero porque tiene que pagar los gastos (expenses) del carro. Si no trabaja no puede pagar su gasolina ni salir con sus amigos. Su mam dice que es mejor quedarse en casa. Su mam est preocupada porque su hermano estuvo en el hospital con una gripe muy fuerte el mes pasado. Slide 4Cmo termina la historia?