Solve Equation
x^2 -4x +8 = 0

Answers

Answer 1
X=2 plus or minus 2i

Related Questions

Robyn opened a bank account to save her birthday money. it was paying 3.75% interest. then the interest rate went up by 0.65%. how much is her new interest rate?

Answers

her new interest rate would be 4.40%

Lena's penny bank is 1/2 full. After she removes 200 pennies, it is 3/10 full. How many pennies can Lena's bank hold?

Answers

(1/2)*x - (3/10)*x = 200
(5/10)*x - (3/10)*x = 200
(2/10)*x = 200
(1/5)*x = 200
x = 200*(5/1)
x = 200*5
x = 1,000 pennies

How is the data represented on a scatterplot that depicts an exponential model?

Answers

Final answer:

In a scatterplot that depicts an exponential model, the data points will form a curve that resembles the shape of an exponential function.

Explanation:

In a scatterplot that depicts an exponential model, the data points will form a curve that resembles the shape of an exponential function. The x-axis represents the independent variable, while the y-axis represents the dependent variable. As the x-values increase, the corresponding y-values will increase at an exponential rate. For example, if we are graphing the growth of a population over time, the scatterplot will show the population size increasing rapidly as time progresses.

On a scatterplot depicting an exponential model, the data points are represented as points on a curvy line. The correct answer is option D) points on a curvy line.

In a scatterplot depicting an exponential model, the data points typically form a curvy line. Exponential relationships show rapid growth or decay, which is reflected in the scatterplot as a smooth, non-linear curve.

As the independent variable increases, the dependent variable changes exponentially, resulting in data points that do not lie along a straight line but instead form a distinctive curve. This curve can either rise sharply or decrease rapidly, depending on whether the exponential function involves growth or decay.

For instance, in exponential growth, the data points start small and then rapidly increase, forming a curve that steepens over time. Conversely, in exponential decay, the data points start large and decrease rapidly, forming a curve that flattens out as it approaches zero.

Therefore, on a scatterplot representing an exponential model, the data points are typically observed to form a curvy line, as seen in option **D)**.

Complete question : How is the data represented on a scatterplot that depicts an exponential model?

A) points on a line

B) random points

C) points on a horizontal line

D) points on a curvy line

Jeremy has a box of 500 nails that weighs 1.35 kilograms. He uses 60 nails to build a birdhouse. How much do the nails in the birdhouse weigh?

Answers

.162 kilograms?

How I got my answer:

1.35÷500=.0027

.0027×60=.162

For the table below, determine the function rule, and find each of the missing y-values.

Function Rule: ?
x y
1 4
3 6
4 7
5 ?
7 10
10 ?

Answers

The answer is 8 and 13


y = ax + b
y = 4, x = 1        ⇒  4 = a + b
y = 6, x = 3       ⇒  6 = 3a + b

Solve the system of equation:
a + b = 4
3a + b = 6
______
b = 4 - a
3a + b = 6
______
3a + 4 - a = 6
2a + 4 = 6
2a = 6 - 4
2a = 2
a = 2/2 = 1
b = 4 - a = 4 - 1 = 3

So, the function rule is: y = x + 3

Thus, if x = 7, then y = 7 + 3 = 10
If x = 10, then y = 10 + 3 = 13


x y
1 4
3 6
4 7
5 8
7 10
10 13

Three friends agree to save money for a graduation road trip. They decide that each of them will put $0.25 in the fund on the first day of May, $0.50 on the second day, $0.75 on the third day, and so on. At the end of May, there will be $_____ in their fund. (Hint: There are 31 days in May.)

Answers

Answer: At the end of May, there will be $372.

Explanation:

Since we have given that

On the first day of May, each one save =$0.25

Number of friends = 3

Total save on the first day of May is given by

[tex]0.25\times 3=\$0.75[/tex]

Similarly,

On the second day of May, each one save =$0.25

Total save on the second day of May is given by

[tex]0.50\times 3=\$1.5[/tex]

Similarly,

On the third day of May, each one save =$0.25

Total save on the third day of May is given by

[tex]0.75\times 3=\$2.25[/tex]

This series becomes arithmetic progression,

[tex]0.75,1.5,2.25......[/tex]

Here, a = 0.75

d=common difference is given by

[tex]d=a_2-a_1=1.5-0.75=0.75\\d=a_3-a_2=2.25-1.5=0.75[/tex]

Since there are 31 days in the month of May,

So, n=31

We need to calculate the sum of 31 terms to get our answer,

[tex]S_n=\frac{n}{2}(2a+(n-1)d)\\\\S_{31}=\frac{31}{2}(2\times 0.75+(31-1)\times 0.75)\\\\=\frac{31}{2}(1.5+30\times 0.75)\\\\=\frac{31}{2}(24)\\\\=31\times 12\\\\=\$372[/tex]

Hence, at the end of May, there will be $372.

Final answer:

The total amount in the fund at the end of May is 239.25.

Explanation:

To find the total amount of money in the fund at the end of May, we need to calculate the sum of the money put into the fund on each day. The students decide to put 0.25 on the first day, 0.50 on the second day, 0.75 on the third day, and so on. This is an arithmetic sequence, where the first term (a) is 0.25 and the common difference (d) is 0.25. The formula to find the sum of an arithmetic sequence is:

S = (n/2)(2a + (n-1)d)

In this case, n = 31 (since there are 31 days in May), a = 0.25, and d = 0.25. Plugging these values into the formula, we get:

S = (31/2)(2 * 0.25 + (31-1) * 0.25) = 239.25

Therefore, at the end of May, there will be 239.25 in their fund.

How will the solution of the system y > 2x + and y < 2x + change if the inequality sign on both inequalities is reversed to y < 2x + and y > 2x + ?

Answers

Answer:

The System of inequality is ,

1. y > 2 x + p

2. y < 2 x + p

Suppose we assign some values to p and q and draw its graph

And, then the inequality sign on both inequalities is reversed

3. y < 2 x + p

4. y > 2 x + p

And , then draw it's graph

it has been found that, the solution set of both the inequality remains same.That is there is no point or set of points , which satisfy both the system of inequality.

The system has no solution.

Answer:

There is no solution to the system in its original form. There are no points in common. If the signs are reversed, the system has an intersection with an infinite number of solutions.

Step-by-step explanation:

edge - 2023 :)

The population of a town increases at the rate of 1% each year. today the town’s population is 8,500. what will the population be in five years?

Answers

Population of the town after 5 years = 8933.59.

What is Population growth rate?

Population growth rate is defined as the change in the size of the population with respect to the time.

The growth rate is usually written as the ratio of the annual increase or decrease in population to the entire population of that year.

The formula for finding the future population is,

P(F) = P(R) [ 1 + r]ⁿ , where

P(F) = Future population

P(R) = Present population

r = Growth rate

n = Number of years

From the question, we have

P(R) = 8500, r = 1% = 0.01 and n = 5

Substituting these values in the main equation,

P(F) = 8500 [ 1 + 0.01 ]⁵

P(F) = 8500 × 1.01⁵

P(F) = 8933.59

Hence, the population of the town after 5 years if the rate of increase in population is 1% = 8933.59

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You need to sell 250 candy bars at $2 each. If you meet your goal, the total amount of money you will have is measured in the _____. ...?

Answers

Based on the given details you have given, the total amount of money that you will have will be measured in dollars ($). Since the given value is also in dollars which is $2, therefore, the total amount of money you will have is also in dollars which is 250 x $2 is $500 in total. Hope this answers the question. 

What is the equation of the following graph in vertex form?

parabolic function going down from the left and turning at the point negative one comma zero and going up through the point zero comma one and continuing towards infinity
Courtesy of Texas Instruments

y = (x − 1)2
y = (x − 1)2 + 1
y = (x + 1)2 − 1
y = (x + 1)2

Answers

Correct answer is D.

Graph passes through the point (-1, 0).
Therefore, x = -1 and y = 0.

[tex]y=(x+1)^2 \\0=(-1+1)^2 \\0=0^2 \\0=0 \;\; \text{T}[/tex]

This is the only equation which is true for x = -1 and y = 0.
Therefore, the solution is [tex]y=(x+1)^2[/tex]

Answer:

y = (x + 1)^2

Step-by-step explanation:

I used desmos and put each answer choice into the graphing calculator and answer choice D was the only one that matched with the image in the question.

Transversal CD←→ cuts parallel lines PQ←→ and RS←→ at points X and Y as shown in the diagram. If m∠CXP = 106.02°, what is m∠SYD? 73.98° 90° 106.02° 180°

Answers

m∠SYD = 106.02°
..............................................................

If m∠CXP = 106.02°, m∠SYD is 73.98°. Among the given ones the correct option is 1.

What is Transversal?

In geometry, a transversal is a line that intersects two or more other lines in a plane.

When a transversal intersects two parallel lines, it forms a set of eight angles, including alternate interior angles, alternate exterior angles, corresponding angles, and consecutive interior angles.

If the lines PQ←→ and RS←→ are parallel, then the alternate interior angles formed by transversal CD←→ are congruent. Therefore, we have:

m∠CXP = m∠DYX (alternate interior angles)

m∠CXD + m∠DXP = 180° (linear pair)

We can use these two equations to find m∠SYD. First, we need to find m∠CXD, which is the same as m∠YXC because they are vertical angles. We know that:

m∠CXP = 106.02°

So, we can use the linear pair equation to find m∠DXP:

m∠CXD + m∠DXP = 180°

m∠DXP = 180° - m∠CXD

Substituting m∠CXD = m∠YXC, we get:

m∠DXP = 180° - m∠YXC

Now, using the alternate interior angles equation, we can replace m∠CXP with m∠DYX:

m∠DYX = m∠CXP = 106.02°

Finally, we can use the linear pair equation again to find m∠SYD:

m∠DYX + m∠SYD = 180°

m∠SYD = 180° - m∠DYX

m∠SYD = 180° - 106.02°

m∠SYD = 73.98°

Therefore, m∠SYD is 73.98°, i.e., option 1.

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Which construction is illustrated above?
A) a perpendicular to a given line from a point on the line
B) a line segment congruent to a given line segment
C) The perpendicular to a given line from a point not on the line
D) the perpendicular bisector of a line segment

Answers

The perpendicular to a given line from a point not on the line
The perpendicular to a given line from a point not on the line.

So the answer is C

Match the definition with the terms.

1. a portion of a large group
2. choosing a sample so that every member has an equal chance of being chosen
3. choosing a sample from people who are under 15 years old
4. using the responses of a small group to make conclusions about the large group.

random sample
sample
biased sample
estimating from a sample

Answers

1. 
1) "sample" / (a portion of a large group) ;
_____________________________________
2. "random sample" / (choosing a sample so that every member has an                             equal chance of being chosen).
_______________________________________________________
3. "biased sample" /
(choosing a sample from people who are under 15 years old).
 _______________________________________________________
4. "estimating from a sample"/
(using the responses of a small group to make conclusions about the large group).
___________________________________________________

Random sample - choosing a sample so that every member has an equal chance of being chosen (this is the absolute definition of random sampling)

Sample - a portion of a large group is termed as a sample.

Biased sample -  choosing a sample from people who are under 15 years old (biased sampling states that all the members of a group are not included in survey)  

Estimating from a sample - using the responses of a small group to make conclusions about the large group.(estimation means roughly judging something based on some sample )

Rationalize the denominator of sqrt -9 / (4-7i) - (6-6i) ...?

Answers

√(- 9 ) / (( 4 - 7 i ) - ( 6 - 6 i )) = 3 i / ( 4 - 7 i - 6 + 6 i ) =
= 3 i / ( - 2 - i ) = - 3 i / ( 2 + i ) =
[tex]= \frac{-3i}{2 + i}* \frac{2 - i}{2 - i}= \\ = \frac{-6i+3i ^{2} }{2- i^{2} }= \\ = \frac{-3-6i}{2+1}= \frac{-3-6i}{3}= [/tex]
= - 1 - 2 i

Answer:

-3-6i/5 is the answer it was also correct on the test ! :D

how many tens and ones are in 25

Answers

There is 2 tens and 5 ones in 25, because 2 tens= 20 and 5 ones just = 5.
2 tens and 5 ones is the answer your looking for.


All real numbers that are greater than or equal to -1.5 and less than 9.2

Answers

-5.2 is yo answer hope i helped
lets write condition after condition and than merge them.

All real number greater or equal to -1.5
let x be some real number

we write:
x[tex] \geq [/tex]-1.5

all real numbers less than 9.2

x < 9.2

if we merge them together we can write:
[tex]-1.5 \leq x\ \textless \ 9.2[/tex]


p(x) is a polynomial with integer coefficients and p(-3) = 0.

Which statements must be true? Choose all that apply.
x + 3 is a factor of the polynomial.
x - 3 is a factor of the polynomial.
-3 is the constant term of the polynomial.
p(x) can have at most 3 linear factors.

Answers

Answer:

x + 3 is a factor of the polynomial.

Step-by-step explanation:

We have been given that p(x) is a polynomial with integer coefficient.

Also p(-3)=0

Since, p(-3) =0, hence, we can say that -3 is a zero of the polynomial.

Now, we apply factor theorem.

Factor Theorem: If 'a' is a zero of a function f(x) then (x-a) must be a factor of the function f(x).

Applying this theorem, we can say that (x+3) must be a factor of the polynomial.

Hence, first statement must be true.

Answer:  The correct option is (A) (x + 3) is a factor of the polynomial.

Step-by-step explanation:  Given that p(x) is a polynomial with integer coefficients and p(-3)=0.

We are to select the true statement from the given options.

Factor Theorem:  If q(x) is a polynomial with integer coefficients and q(a) = 0, then (q - a) will be a factor of q(x).

Here, it is given that

p(x) is a polynomial with integer coefficients and p(-3) = 0.

Therefore, by Factor theorem, we can say that (x-(-3)), ie., (x + 3) is a factor of the polynomial p(x).

Thus, (x + 3) is a factor of the polynomial.

Option (A) is CORRECT.

What is 2576 divided by 3?

Answers

Final answer:

2576 divided by 3 is equal to 859 with a remainder of 2.

Explanation:

When dividing 2576 by 3, you can divide each digit individually. Start with the first digit, 2. Since 2 is less than 3, you can't divide it evenly, so you move to the next digit. The next digit is 5. With 5, you can divide it evenly by 3, which gives you 1. Now, subtract 3 from 5, which gives you 2. Bring down the next digit, which is 7. The new dividend is 27. Divide 27 by 3, which gives you 9 with no remainder. Finally, bring down the last digit, which is 6. The new dividend is 26. Divide 26 by 3, which gives you 8 with a remainder of 2. So, 2576 divided by 3 is equal to 859 with a remainder of 2.

6 gallons and 3 quarts equal

Answers

False, 6 gallons is 24 quarts or 3 quarts is 0.75 of a gallon

Glenn has a beginning balance of $840 in his checking account. He has a deposit of $375 and withdraws $250 from the ATM. If the ATM fee is $3, what is his new balance?

$718

$212

$962

$572

Answers

Glenn's new balance is $962.

the height of a football in the air t seconds after it is thrown can be modeled by the function y=-16t^2+96t+3, where y are measured in feet and t is time. What is the maximum height that the football reaches? How long did it take the football to reach the maximum height? At what times will the football be above the ground at 122 feet?

Answers

Since the function is a parabola, the maximum height would be the y-coordinate of the vertex. The x-coordinate of the vertex in standard parabolic form is
x = -b/2a.
In the problem, t would now be x.
t = -96/(2*-16) = 3*

Now that you have the time as 3 at the vertex, you can determine the height y at the vertex by substituting it in.
y = -16(3)^2 + 96(3) + 3
y = 147*

If they give you 122 feet and you need to find the time, then just plug that as y and solve for t.
122 = -16t^2 + 96t + 3
0 = -16t^2 + 96t - 119
t = 17/4, 7/4*

*Brainliest answer is always appreciated

The maximum height the football reaches is 147 feet, and it takes 3 seconds for the football to reach that height. To determine when the football is above 122 feet, the equation is set equal to 122 and solved for time t.

To find the maximum height reached by the football, we need to determine the vertex of the parabolic function given by y = -[tex]16t^2[/tex] + 96t + 3. Since the coefficient of [tex]t^2[/tex]is negative, the parabola opens downwards, and the vertex will give us the maximum height.

To find the time at which the maximum height occurs, use the formula t = -b/2a, where a is the coefficient of [tex]t^2[/tex] and b is the coefficient of t.

In this equation, a = -16 and b = 96, so t = -96/(2 x -16) = 3 seconds. Plugging this back into the original equation gives us the maximum height: y = -16[tex](3)^2[/tex] + 96(3) + 3 = 147 feet.

To determine when the football is above 122 feet, we set the equation equal to 122 and solve for t:

122 = -[tex]16t^2[/tex] + 96t + 3. We simplify and solve the quadratic equation, which may yield two possible times, one during the ascent and one during the descent of the football's path.

Given the following:

29 day billing cycle
4/17 Billing date previous balance $1,100
4/27 Payment 700
4/29 Charge 300
5/7 Payment 60

The average daily balance is:
$910.34
$755.17
$810.43
$755.71
None of these

Answers

Final answer:

The average daily balance for the given billing cycle is calculated by summing the product of each daily balance and the length of time it was held, and then dividing by the number of days in the billing cycle. After doing this, the average daily balance comes out to be $755.17.

Explanation:

The subject of this question is finance and it involves calculating the average daily balance for a billing cycle. In this method, the daily outstanding balances are added together and then divided by the total number of days in the billing period.

Here, the billing cycle lasts for 29 days, from 4/17 to 5/17.

From 4/17 to 4/26 (10 days), the balance was $1,100.From 4/27 to 4/28 (2 days), the balance was reduced by $700, therefore, it was $400.From 4/29 to 5/6 (8 days), the balance increased by $300, so became $700.From 5/7 to 5/17 (11 days), the balance was reduced by $60, therefore, it was $640.

Like this, you calculate the balance for each portion of the billing cycle, then multiply each by the number of days that balance was held, add those up, and finally, divide by the number of days in the billing cycle:

((1100*10) + (400*2) + (700*8) + (640*11)) / 29 = $755.17

Therefore, the average daily balance is $755.17.

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1. y - 5/3 =1 2. Combine like terms: -21a + 16a 3. Simplify the expression: 9a - b - 2a - 10b 4. 5(x + 10) + x 5. -4n + 7 + 2n = 1 Thanks for everything!!

Answers

i hope this helps you



1)


y=1+5/3


y=8/3


2)


-21a+16a=5a


3)


7a-9b


4)


5.x+5.10+x=6x+50


5)


5.-4n+7+2n=1


-20n+2n=1-7


-18n= -8


n=4/9

Which ratio is equivalent to 24:2824:28 ?

A.4:74:7

B.12:1612:16

C.18:2118:21

D.48:5848:58

Answers

The key to solving this is to look at the 24 and the 28. First, look at option A.4:74:7

To have 28 equal to 7, you need to divide by 4. But 24 divided by 4 equal 6, so option A doesn't work.

Option B, 12:1612:16. To have 24 equal to 12, divide by 2. But 28 divided by 2 is 14, not 16. Option B doesn't work either.

Now Option D. 48:5848:58 To have 24 equal to 48, multiply by 2. But 28 multiplied by 2 is 56, not 58. Option D does not work.

This only leaves option C.

Answer:

C

Step-by-step explanation:

A company has fixed operating costs of $2,137.00 per month with a production cost of $15.15 per unit. If each unit brings $33.09 in revenue, which of the folowing equations represents the profit for the month? Let x represent the number of units made per month and y represent the total profit for the month. Explain your choice.


plzzz plzzzzzz helpppppp

Answers

The equation that represents the profit for the month is: y = 33.09x - (2,137.00 + 15.15x).

What is operating cost?

The ongoing expenses incurred from the normal day-to-day operations of a business are referred to as operating costs.

The equation that represents the profit for the month is:

y = 33.09x - (2,137.00 + 15.15x)

This equation takes into account the revenue generated by selling x units, which is 33.09x, and subtracts the total cost of producing those x units, which is (2,137.00 + 15.15x). The result is the total profit generated for the month.

We can simplify the equation by combining like terms:

y = 17.94x - 2,137.00

This equation can be used to determine the total profit for any given number of units produced.

The coefficient of x (17.94) represents the profit generated per unit sold, and the constant term (-2,137.00) represents the fixed costs that must be subtracted from the revenue to calculate the profit.

Therefore, the correct equation is y = 33.09x - (2,137.00 + 15.15x), because it takes into account both the revenue and the total costs associated with producing x units.

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What is the most misleading aspect of this graph that might lead one to the wrong conclusion?


connecting the data points with a line

scale of the y-axis

scale of the x-axis

spacing of the grid

(graph attached)

Answers

c the spacing of the grid


SOMEONE PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Kevin gets an auto loan of $12,000 at 8% annual interest. The terms of his loan state that he has to pay $292.96 each month for 4 years. How much total interest will he have to pay?

$384

$960

$1171.84

$2062.08

Answers

loan is the 12,000 at 8% annual
292.96 each month for 4yrs
292.96*48months=14,062.08-12,000=2062.08

what is 3[10-(27÷9)]?

Answers

first do (27/9) which comes out to 3, then it's (10-3) which is 7, then 7*3 so your answer is 21 

3[10-(27/9)]
3[10-3]
3[7]
21
 3[10-(27÷9)]
     3(10-3)
        3x7
         21

 3[10-(27÷9)]= 21

solve for z
[tex] \sqrt{ z^{2}+8z } +4=z [/tex]

Answers

(√z²+8z) + 4 = z
z + 2√2 z + 4 = z
2√2 z = -4
z = -4 / 2√2
z = -2/√2
z = -√2

So, your final answer is -√2

16 lizards have stripes on there tails . the ratio of lizards with white tails to those with yellow tail stripes is 1:2 . how many lizards have yellow tail stripes

Answers

1:2
1 white lizard to 2 yellow Lizards
so of those 3 lizards, 2 have yellow
or 2/3 of the lizards have yellow
16 * (2/3) = 10  2/3 or 11, because you can't have 2/3 of a lizard... usually ;D
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