Use the quadratic formula to determine the exact solutions to the equation.


2x2−9x+1=0



I feel like it's either b or d. I keep getting the same answer when I solve it but the thing is, it's not on the answer choices. My answer was (9 ± √ - 89 )/ 4


but it's not thereeeee :((

Answer:

NOT THE ANSWER try to include her scores because there is no data

Answer:

x =7

Step-by-step explanation:

3x - 9 + 12 - 6x = -18

Combine like terms

-3x +3 = -18

Subtract 3 from each side

-3x +3 -3 = -18 -3

-3x = -21

Divide each side by-3

-3x /-3 = -21 /-3

x =7

Answer:

\(x=7\)

Step-by-step explanation:

\(3x - 9 + 12 - 6x = -18\)

\(3x+ - 9 + 12+ - 6x = -18\)

\(3x+- 6x + - 9 + 12+ = -18\)

\(-3x+ 3= -18\)

\(-3x= -18-3\)

\(-3x= -21\)

\(3x=21\)

\(x=21/3\)

\(x=7\)

The mass of carbon in 1.5 million tons of coal is approximately 6.56 million tons.

The chemical formula provided, \(C_{135}\)\(H_{96}\)\(O_{9}\)ns, represents the composition of coal. From the formula, we can determine that each molecule of coal contains 135 atoms of carbon. To find the mass of carbon in coal, we need to calculate the proportion of carbon atoms in the formula.

The molar mass of carbon is approximately 12 g/mol. Using the atomic mass of carbon and the number of carbon atoms in the formula, we can determine the mass of carbon per molecule of coal.

Next, we multiply the mass of carbon per molecule by the number of molecules in 1.5 million tons of coal. This will give us the total mass of carbon in 1.5 million tons of coal. Finally, we convert the mass from grams to tons to obtain the final result.

By performing these calculations, we can determine the mass of carbon in 1.5 million tons of coal.

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Answer:

Step-by-step explanation:

lets mijdkdefbdhnrr

The fraction  12/3+3/4÷(−1/3)−1/2is evaluated to give -114/10

A fraction can be defined as part of a whole element, variable or number

The several  types of fractions in mathematics are;

From the information, we have that;

12/3+3/4÷(−1/3)−1/2

The fraction given is a mixture of proper fractions and improper fractions

Expand the bracket, we get;

12/3 + 3/4 ÷ -1/3 -1/2

Find the lowest common denominator

48 + 9 /12 ÷ -2 - 3 /6

Add the numerators

57/12  ÷ -5/6

Take the inverse of the divisor and multiply

57/12 × 6/-5

-114/10

Hence, the value evaluated from the fraction is -114/10

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9514 1404 393

Answer:

  a = 3, b = 12, c = 13

Step-by-step explanation:

The applicable rules of exponents are ...

  (a^b)(a^c) = a^(b+c)

  (a^b)/(a^c) = a^(b-c)

  (a^b)^c = a^(bc)

___

You seem to have ...

  \(\dfrac{2^5\times8^4}{16}=\dfrac{2^5\times(2^3)^4}{2^4}\qquad (a=3)\\\\=\dfrac{2^5\times2^{3\cdot4}}{2^4}=\dfrac{2^5\times2^{12}}{2^4}\qquad (b=12)\\\\=2^{5+12-4}=2^{13}\qquad(c=13)\)

_____

Additional comment

I find it easy to remember the rules of exponents by remembering that an exponent signifies repeated multiplication. It tells you how many times the base is a factor in the product.

  \(2\cdot2\cdot2 = 2^3\qquad\text{2 is a factor 3 times}\)

Multiplication increases the number of times the base is a factor.

  \((2\cdot2\cdot2)\times(2\cdot2)=(2\cdot2\cdot2\cdot2\cdot2)\\\\2^3\times2^2=2^{3+2}=2^5\)

Similarly, division cancels factors from numerator and denominator, so decreases the number of times the base is a factor.

  \(\dfrac{(2\cdot2\cdot2)}{(2\cdot2)}=2\\\\\dfrac{2^3}{2^2}=2^{3-2}=2^1\)

Answer:

Multiply x + y = 3 by 3 and add it to -3x - 2y = -7

Step-by-step explanation:

When using elimination to solve a system of equations, you multiply one equation by some number. The reason for doing this is that when you add it to the second equation, you want one variable to cancel out. When one variable cancels out (in this case x), you can solve for the other variable (in this case y). I will show this:

3(x + y = 3) = 3x + 3y = 9

   3x +  3y =  9

+ -3x + -2y = -7

---------------------------

              y  = 2

Now, knowing that y = 2, you can substitute y=2 into either equation to solve for x.

-3x - 2(2) = -7

-3x -4 = -7

-3x = -3

x = 1 | to double check (1, 2) as your answer plug these values into both equations

Finding this solution would not have been possible if not for cancelling out the x's above. The other three are wrong because none of the other options cancels out one of the variables.

Answer:

I´m not an expert but I´ll look at it :3

Step-by-step explanation:

Answer:

A. \(\frac{4}{5}y^{2}+\frac{5}{6}y^7\)

Step-by-step explanation:

A polynomial is a combination of terms separated by + or − signs. A polynomial does not contain variables raised to negative or fractional exponents, variables in the denominator or under a radical, or any special features such as trigonometric functions, or logarithms.

Lilly needs 686 dark power crystals to raise 6174 zombies.

To solve this problem, we need to determine how many dark power crystals are needed to raise a specific number of zombies. We know that each crystal can raise 9 zombies. So, to determine the number of crystals needed to raise a given number of zombies, we simply divide that number by 9.

In this case, we want to know how many crystals Lilly needs to raise 6174 zombies. So we divide 6174 by 9

= 6174 / 9

Divide the numbers

= 686

This means that Lilly needs 686 dark power crystals to raise 6174 zombie

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The given question is incomplete, the complete question is:

Lilly is using dark power crystals to raise an army of zombies.each crystal can raise 9 zombies. how many crystal does Lily need to raise 6174 zombies​

The solution to the equation -1/2w - 3/5 = 1/5w is w = -6/7, meaning that w equals negative six-sevenths when the equation is true.

To solve the equation -1/2w - 3/5 = 1/5w, we'll start by simplifying and rearranging the terms to isolate the variable w.

First, we'll combine like terms on the left side of the equation:

-1/2w - 3/5 = 1/5w

To make the equation easier to work with, let's get rid of the fractions by multiplying every term in the equation by the common denominator, which is 10:

10 * (-1/2w) - 10 * (3/5) = 10 * (1/5w)

This simplifies to:

-5w - 6 = 2w

Next, we'll group the w terms on one side of the equation and the constant terms on the other side:

-5w - 2w = 6

Combining like terms, we have:

-7w = 6

Now, we'll isolate the variable w by dividing both sides of the equation by -7:

(-7w)/(-7) = 6/(-7)

This simplifies to:

w = -6/7

Therefore, the solution to the equation -1/2w - 3/5 = 1/5w is w = -6/7.

In conclusion, w is equal to -6/7 when the equation -1/2w - 3/5 = 1/5w is satisfied.

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Answer:

Step-by-step explanation:

Sorry I can't explain how it is done. It is very difficult to explain on paper.

Answer:

34

Step-by-step explanation:

28/2 + 3(8) - (12-8)

14 + 24 - 4

14 + 20

34 is your answer

hope this helps

To solve the fraction addition problem in C++, you can define a Fraction struct to represent fractions. Implement a gcd function to find the greatest common divisor.

Parse the input fractions and perform the addition using overloaded operators. Print the result. The code reads the input string, finds the "+" operator position, parses the fractions, performs the addition, and prints the sum.

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Answer:

amogus

Step-by-step explanation:

Answer:

25 percent

Step-by-step explanation:

70/280x100 gives as 25 percent

Answer:

1/4 or 0.25%

Step-by-step explanation:

280 ÷ 70 = 1/4 or 0.25%

Answer:

10,781 voters

Step-by-step explanation:

In election poll, if 4 out of 7 voters will vote for a certain political party, the total voters will be 7 and 3 out of 7 will not vote for the political party

If there are 25 156 voters, we are to find the number of voters that will not vote for that party. Hence the number of people that will not vote is expressed as;

= 3/7 * 25,156

= 75,468/7

= 10,781

Hence approximately 10,781 voters will not vote for the party.

Answer:

B. 2x + 12 = 28

Step-by-step explanation:

x is representative of the wingspan of the vampire bat. suppose the ghost bat has a wingspan of 28 inches.

if the wingspan of a ghost bat is 12 more than twice the vampire bat's, then 2x + 12 is the equation used to find the ghost bat's wingspan. we already know the ghost bat's wingspan is 28, therefore the equation is 2x + 12 = 28

Answer:

*cough**cough* Ms. Roth?

Answer:

7/20 miles

Step-by-step explanation:

get a common denominator

subtract the numerators

then you have the fraction she biked

If Two similar cuboids have corresponding widths of 11 cm and 9 cm.

a. the ratio of their surface area is: 11/9

b. The surface area of the smaller cuboid are shapes​ is  243 cm².

a) Let's call the length of the larger cuboid "L1" and the width "W1". The length of the smaller cuboid can be represented as "L2" and the width "W2".

Since the two cuboids are similar, we have the relationship:

L1/L2 = W1/W2 = √(W1/W2)

We know that W1 = 11 cm and W2 = 9 cm, so W1/W2 = 11/9.

Squaring both sides, we get:

(W1/W2)^2 = (11/9)^2 = 121/81

Now, the ratio of their surface area can be found by taking the square root of the ratio of their lengths squared:

(L1/L2)^2 = (W1/W2)^2 = 121/81

Taking the square root of both sides:

L1/L2 = √(121/81) = 11/9

b) Let use the ratio of their surface area to find the surface area of the smaller cuboid:

SA1/SA2 = (L1/L2)^2 = (11/9)^2 = 121/81

SA2 = SA1 / (L1/L2)^2 = 363 / (121/81) = 363 * 81/121 = 243 cm²

Therefore the surface area of the smaller cuboid is 243 cm².

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Answer:

Step-by-step explanation:

do the thing times 2

Answer:

(0, - 9 )

Step-by-step explanation:

x = 2y + 18 → (1)

5x = - 3y - 27 → (2)

substitute x = 2y + 18 into (2)

5(2y + 18) = - 3y - 27

10y + 90 = - 3y - 27 ( add 3y to both sides )

13y + 90 = - 27 ( subtract 90 from both sides )

13y = - 117 ( divide both sides by 13 )

y = - 9

substitute y = - 9 into (1)

x = 2(- 9) + 18 = - 18 + 18 = 0

solution is (0, - 9 )

Answer:

The sequence generated will be 10,8,6,4,2,......

Step-by-step explanation:

We want to generate a sequence here

f(n + 1) = f(n) - 2

f(1) = 10

So f(2) = f(1) - 2 = 10 -2 = 8

f(3) = f(2) - 2 = 8-2 = 6

f(4) = f(3) -2 = 6-2 = 4

f(5) = f(4) - 2 = 4-2 = 2

So the sequence will be ;

10, 8 , 6 , 4 , 2 , •••••••••

Answer:

10, 8, 6, 4, 2, ...

Answer: They earned 500 bucks in total

Answer:

They want to make 200 dollars

Step-by-step explanation:

40*5=200

The area of the window is 8\(m^{2}\).

An object's area is how much space it takes up in two dimensions. It is the measurement of the number of unit squares that completely cover the surface of a closed figure.

The word "area" refers to a free space. The length and width of a form are used to compute its area.

Any shape's area can be calculated by counting how many unit squares will fit inside of it.

According to the question,

Length of window=2m

Width of window=4m

Area of window=Length*Width

                          =2*4

                          =8\(m^{2}\)

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Answer:

5.5

Step-by-step explanation:

that is the answer....

Answer:

Solving for m gives:

\(m=\frac{P-50}{5}\)

which is option C in the list of possible answers

Step-by-step explanation:

Starting with the given equation, we work on using distributive property, and then on isolating the term with the variable to express:

\(P=5\,(m+10)\\P=5m+50\\P-50=5m\\\frac{P-50}{5} = m\\m=\frac{P-50}{5}\)

The height of the 10th bounce of the ball will be 0.6 feet.

A geometric sequence is a sequence in which each term is found by multiplying the preceding term by the same value.

The nth term of the geometric sequence is given by

\(\sf T_n=ar^{n-1}\)

Where,

According to the given question.

During the first bounce, height of the ball from the ground, a = 4.5 feet

And, the each successive bounce is 73% of the previous bounce's height.

So,

During the second bounce, the height of ball from the ground

\(\sf = 73\% \ of \ 10\)

\(=\dfrac{73}{100}(10)\)

\(\sf = 0.73 \times 10\)

\(\sf = 7.3 \ feet\)

During the third bounce, the height of ball from the ground

\(\sf = 73\% \ of \ 7.3\)

\(=\dfrac{73}{100}(7.3)\)

\(\sf = 5.33 \ feet\)

Like this we will obtain a geometric sequence 7.3, 5.33, 3.11, 2.23,...

And the common ratio of the geometric sequence is 0.73

Therefore,

The sixth term of the geometric sequence is given by

\(\sf T_{10}=10(0.73)^{10-1\)

\(\sf T_{10}=10(0.73)^{9\)

\(\sf T_{10}=10(0.059)\)

\(\sf T_{10}=0.59\thickapprox0.6 \ feet\)

Hence, the height of the 10th bounce of the ball will be 0.6 feet.

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The number of persons added to the population rises annually if the population's growth rate, r, is positive and stable.

Given statement,

If the growth rate r of a population is positive and remains constant, the number of people added to the population,

In the given case the solution will be the number of people added to the population " increases each year ".

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