Solve x^2 + 18x – 19 = 0 by completing the square.
A) x = –1, x = 19
B) x = –9 + 10i, x = –9 – 10i
C) x = –9 + , x = –9 –
D) x = 1, x = –19

Answers

Answer 1

Answer:

The answer is D

Step-by-step explanation:


Related Questions

24+28 written in distributive prop

Answers

Answer:

24   +    28

2*2*2*3   +    2*2*7              [prime factors]

You may distribute any common ones, for example:

  4(6+7)              [that is, 2*2*(2*3 + 7)

  2(12+14)

Step-by-step explanation:

Step-by-step explanation:

52

Wow

Wow

Wow

Common sense

A total of 4.4 ml of medication is in a vial. An injection of 1.125 ml is withdrawn into a
syringe. How much remains in the vial?

Answers

Answer:

2.275

Step-by-step explanation:

4.4-1.175= 2.275

Divide. Express your answer in simplest form.
5/12 divided by 7/8

Help plzzz

Answers

Answer:

5/12 / 7/8 =10/21

Step-by-step explanation:

Answer:

10/21

Step-by-step explanation:

5/12 divided by 7/8

5/12÷7/8

5/12×8/7

5×8/12×7

10/21

So the answer is 10/21

Change this into decimal step by step plz

Answers

Answer:

2.6

Step-by-step explanation:

3/5 ---> ?/100

100/5 ---> 20

3       20         60

--  x           =   -------

5       20         100

60/100 = 6/10

6/10 as a decimal is 0.6

2 + 0.6

= 2.6

Hope this helps!!

The graph below shows a quadratic function f(x) and an absolute value function g(x)

Answers

Answer:

I believe it should be b and d

Step-by-step explanation:

hoped it helped :)

A watering can dispenses water at the rate of 0.20 gallon per minute. The original volume of water in the can was 8 gallons. Which set of ordered pairs shows the volume of water in the can in gallons (y), as a function of time in minutes (x), from the first minute after can starts dispensing water?

{(7.8, 1), (7.6, 2), (7.4, 3)}
{(1, 7.8), (2, 7.6), (3, 7.4)}
{(8.0, 1), (7.8, 2), (7.6, 3)}
{(1, 8.0), (2, 7.8), (3, 7.6)}

Answers

Answer:

The answer is {(7.8, 1), (7.6, 2), (7.4,3)}

Step-by-step explanation:

The first minute, you would have to subtract 8 - 0.20

Answer:(7.8, 1), (7.6, 2), (7.4, 3)}

Step-by-step explanation:

5 is 2% of what number?

Answers

Answer:

0.1 or 10

Step-by-step explanation:

set it up and it’s easy 5 times 2 divided by 100

Answer:

5 is 2% of 250

HELPPP ASAPPP 30 POINTS
John goes out to eat at a local restaurant. The bill comes to $47.83. John want to leave a 20% tip. How much of a tip should he leave? (use only numbers) $____

Answers

Answer:

Twenty percent of $47.83 is equal to $14.66

If you did 20% of 47.83, that would equal 9.566. So, now you need to take the 5, which is equal to 500 cents, and turn it into 5 dollars. (One hundred cents is a dollar so 500 cents , is 5 dollars.) now it’s 9 + 5. Easy, it’s 14. Now add back the 66, and it’s 14.66 dollars. So the answer is...

14.66

Hope this helps =3

Anyone help me please

Answers

Answer:

2

Step-by-step explanation:

Multiply 3 by the exponets and then times those fractions  :)))))

HELP NOW! A music club has 35 drum players. If 25% of the total number of members in the club are drum players, what is the total number of members in the club?

Answers

140 total members. 35 is just 1/4 of the members there so you can just multiply it 4 times to get your answer because 100% of members is 140

35 = 25%
70 = 50%
105 = 75%
140 = 100%

There's a way to think about it, in case you get other questions like this.

When you look at your problem, take out the 35. Out of the picture.

Look at 25%. 25% x 4 = 100% Meaning 4 is golden.

Then bring back the 35 and multiply it by 4. It gives you 140.

:)))) Use this mentallity on other question on percentages!

which of these is an example of typing at an average of 42 words per minute

Answers

There aren’t any options but maybe 42m where m represents the minutes. So for every minute it will be multiplied by 42

A radioactive substance decays according to the formula
Q(t)=Q0eâkt where Q(t) denotes the amount of the substance present at time t (measured in years),
Q0 denotes the amount of the substance present initially, and k (a positive constant) is the decay constant.
(a) Find the half-life of the substance in terms of k.
(b) Suppose a radioactive substance decays according to the formula
Q(t)=15eâ0.0001438t
How long will it take for the substance to decay to half the original amount? (Round your answer to the nearest whole number.) yr

Answers

Answer:

[tex]t=4820 y[/tex]

Step-by-step explanation:

a) The half-life equation is given by:

[tex]t_{1/2}=\frac{ln(2)}{k}[/tex]

b) Using the decay equation we have:

[tex]Q(t)=15e^{-0.0001438t}[/tex]

we need to find t when [tex]Q(t)=\frac{Q_{0}}{2}[/tex]

[tex]7.5=15e^{-0.0001438t}[/tex]

[tex]0.5=e^{-0.0001438t}[/tex]

[tex]ln(0.5)=-0.0001438t[/tex]

[tex]t=\frac{ln(0.5)}{-0.0001438}[/tex]

[tex]t=4820 y[/tex]

Therefore, it will take 4820 years to decay to half the original amount.

I hope it helps you!

Check this for me guys and lmk!! ASAP thanksss

Answers

Answer:

Step-by-step explanation:

for the first division blank you would get 11/2 or 5 1/2 flip the second fraction and multiply

for the second one it would be 5/2 or 2 1/2

For the third one it would be 3. like i said flip the second fraction and multiply in order to divide correctly

Answer:

2 1/2 for oatmeal

3 for salad

Step-by-step explanation:

express 105/20 as amixed number in simpilist form

Answers

Answer:

[tex]5\frac{1}{4}[/tex]

Step-by-step explanation:

105 ÷ 20 = 5.25[tex]5.25 = 5\frac{25}{100} = 5\frac{1}{4}[/tex]  

I hope this helps!

Answer:

5 [tex]\frac{1}{4}[/tex]

Step-by-step explanation:

Divide using long division. The whole number portion will be the number of times the denominator of the original fraction divides evenly into the numerator of the original fraction, and the fraction portion of the mixed number will be the remainder of the original fraction division over the denominator of the original fraction.

Part D
How are the signs of the coordinates of point A and point C related HURRY

Answers

Answer: They both are located at (2,3)

Step-by-step explanation:

The sign that A and C are related is that they both have the same distance from the y axis.

What are coordinates?

a pair of numbers that employ the horizontal and vertical distinctions from the two reference axes to represent a point's placement on a coordinate plane. typically expressed by the x-value and y-value pairs (x,y).

Coordinates are always written in the form of small brackets the first term will be x and the second term will be y.

For example (5,3) here 5 will be for the x and 3 will be for the y.

Another example is (9,0) here 9 is for x and 0 is for y.

Given that the coordinates A and C how are related now as we can see that both A and C are the same amount of distance by the y-axis.

This also can be seen by the coordination of A and C.

For more about coordinates

https://brainly.com/question/7869125

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what is 4 60/72 as a decimal

Answers

Answer:

0.206897

Step-by-step explanation:

it is 0.206897 because you have take the whole make uneven fraction an add it to 60 in 60/72 to get 348 divided equals 0.206897

The decimal representation of expression 4(60/72) is approximately 4.8333...

We have,

To find the decimal representation of 4(60/72), we can perform the division and multiplication:

4(60/72)

This can be written as,

(72 x 4 + 60) / 72

Simplifying the fractions.

348/72

Divide the numerator by denominator.

4.83333

Thus,

The decimal representation of expression 4(60/72) is approximately 4.8333...

Learn more about expressions here:

https://brainly.com/question/3118662

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Which number line best represents the solutions to 7 < -2x + 3?

Answers

Answer:

we need a number line for this question...

Step-by-step explanation:

Answer:

x< -2

Step-by-step explanation:

Calculus application

1. Supposed that a ball is dropped from the upper observation deck of the Horizons 101 Tower 1., located
178 m above the ground. (a) What is the velocity of the ball after 5 sec? (b) How fast is the ball traveling
when it hits the ground?

Answers

Answer:

49m/s

59.07 m/s

Step-by-step explanation:

Given that :

Distance (s) = 178 m

Acceleration due to gravity (a) = g(downward) = 9.8m/s²

Velocity (V) after 5 seconds ;

The initial velocity (u) = 0

Using the relation :

v = u + at

Where ; t = Time = 5 seconds ; a = 9.8m/s²

v = 0 + 9.8(5)

v = 0 + 49

V = 49 m/s

Hence, velocity after 5 seconds = 49m/s

b) How fast is the ball traveling when it hits the ground?

V² = u² + 2as

Where s = height = 178m

V² = 0 + 2(9.8)(178)

V² = 0 + 3488.8

V² = 3488.8

V = √3488.8

V = 59.07 m/s

We randomly sample 50 items from Target stores and note the price for each. Then we visit Walmart and collect the price for each of those same 50 items. Should we use a paired or non-paired test?

Answers

Answer:

A paired t-test

Step-by-step explanation:

Number of items = 50

Variable in question = Price of each item

Classification of items = Similar or Same items

Locations from where items are drawn = 2 locations

The locations = Target Store & Walmart Store

Type of test to use = PAIRED TEST

This is because the items are same or similar and their comparison is the comparison of the mean values of two related groups. In this case, it is not immediately concluded that both groups have equal variance.

PLEASE HELP ME FIRST ANSWER GETS BRAINLIST AND ANSWER MY OTHERS PLEASE

Answers

Answer:

2. ad is the angle bisector of angle a

3. ad is perpendicular to bc

4. both are right angles as given

5. common

6. ASA congruence

Triangle similarity problem

Answers

Answer:

ST = 16

Step-by-step explanation:

The similar triangles are given as triangle PQR similar to triangle STU.

That makes sides PQ and ST corresponding sides. It also makes sides PR and SU corresponding sides. The ratios of the lengths of corresponding sides of similar triangles are equal.

[tex] \dfrac{ST}{PQ} = \dfrac{SU}{PR} [/tex]

[tex] \dfrac{5x + 1}{36} = \dfrac{11x - 5}{63} [/tex]

Multiply both sides by 9.

[tex] \dfrac{5x + 1}{4} = \dfrac{11x - 5}{7} [/tex]

Cross multiply.

[tex] 7(5x + 1) = 4(11x - 5) [/tex]

Distribute on both sides.

35x + 7 = 44x - 20

Subtract 44x from both sides.

-9x + 7 = -20

Subtract 7 from both sides.

-9x = -27

Divide both sides by -9.

x = 3

ST = 5x + 1 = 5(3) + 1 = 15 + 1 = 16

Answer: ST = 16

need help with another sequence problem.
1,1,2,3,5,__,__,__ help!!!

Answers

The answers is 8,13,21,34,55.....

Determine the integer value of n that satisfies the the equation.

4^n=16
3^n=1/81

Answers

Answer:

Step-by-step explanation:

[tex]4^{n} = 16 \\\\4^{n} = 4^2\\\\[/tex]

n = 2

2)

[tex]3^{n} =\frac{1}{81}\\\\ = \frac{1}{3^{4}}\\\\3^{n} = 3^{-4}[/tex]

n = -4

FIRST TO ACTUALLY HELP ME WITH THIS QUESTION GETS THE BRAINLIEST

Answers

Answer:

Just do 14+15 because the variables are equal.

Answer:

29 ehehehehe

Step-by-step explanation:

Solve the
equation:
X/2=17

Answers

Answer:

x=34

Step-by-step explanation:

[tex]\frac{x}{2}=17\\x=2*17\\x=34[/tex]

Answer:

x=34

Step-by-step explanation:

Multiply 2 on both sides

x/2=17

x=34

Hope this helps :D

Please mark brainliest if correct

A unit rate is a rate in which A one of the quantities is 1. B the quantities add up to 1. C both of the quantities are 1. D neither of the quantities is 1.

Answers

Answer: A. because it is the only one that makes sense, the unit rate is where the second quantity is one unit: etc. 1 minute=60 seconds1 hour=60 minutes (or) 3600 seconds1 day=24 hours (or) 1440 minutes.

A box with an open top will be constructed from a rectangular piece of cardboard. The piece of cardboard is 16 inches wide and 20 inches long. The box will be constructed by cutting out equal squares of side x at each corner and then folding up the sides. What is the entire domain for the function V(x) that gives the volume of the box as a function of x? ​

Answers

Answer: A box with an open top is to be constructed from a rectangular piece of cardboard with dimensions 18 in. by 30 in. by cutting out equal squares of side x at each corner and then folding up the sides as in the figure. Express the volume V of the box as a

Step-by-step explanation:

12x + 4x + 25y + 15y A. 2(8x + 10 B. 4(4x + 10) C. 5(3x + 5y D. 8(2x + 5y​

Answers

Answer:

109 x. A. Try your expression with a real number to see if it makes sense. For ... negative is a positive. C:X-3 ya tx combine like terms. 2x-3y². (De) 4x3y - 6xy3 ... B. (94-6) = (12-4x). Solve for x distribute on each side. if you use a calculator, put the ... distribute solve: 3(x+2). 3x +6. +57. 8 X+. 1 -6. = 5(-2-x). < -10 -5x. +5*. < -10.

Step-by-step explanation:

Answer:

The answer to 12x + 4x + 25y + 15y is 16x+40y for sure, I did it multiple times.

I don't see that answer in what you provided.

Step-by-step explanation:

Is there anything more that I can do to help you?

Write the equation in slope-intercept form. 4x+3y=18
Question 7 options:

y=43x+6

y=−34x+184

y=−43x+6

y=4x+6

Answers

Answer:

y = -4/3x + 6

Step-by-step explanation:

1. 3y - 4x + 3y = 18 - 3y

2. 4x = -3y + 18

3. 18 - 4x = -3y + 18 - 18

4. -3/ -3y = 4x - 18 /3

5. y = -4/3x + 6


PLEASE ANSWER I WILL GIVE BRANLYIST

Answers

Answer:

use what is given

use CTCP

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