PLEASE HELP!
Solve by completing the square
x^2+8x = -20

Answers

Answer 1

Answer: x= -4+/- 2i

Step-by-step explanation: Used the formula (b/2)^2  to create a new term. I solved for x.

FYI

+/- means plus or minus sign I couldn't find the symbol on my key board. Hope this helps!


Related Questions

Given quadrilateral RSTU, determine if each pair of sides (if any) are parallel and which are perpendicular for the
coordinates of the vertices.
R(0,0), 5(6,3), T(5,5), U(-1,2)

Answers

Answer:

US is parallel to RT, and UR is parallel to ST

ST is perpendicular to US and UR is perpendicular to RT

Basically anywhere that there's lines that make right angles are perpendicular to each other

I hope this helps

Step-by-step explanation:

Is -√9 a rational, irrational, whole, or interger

Answers

Answer:

irrational

Step-by-step explanation:

Answer:

It is an irrational number.

Step-by-step explanation:

Whole numbers are numbers that include all natural numbers, (1 - infinity), and 0. Integers are numbers that can be written without fractional components. Rational numbers are numbers that can be written in the form P/Q, where p and q are integers. There only leaves irrational numbers.

Two number cubes are rolled .what is the probability that the sum of the numbers on the cubes is 12 ?? The Answer is fraction


A.12/36
B.1/36
C.1/12
D.35/36

Answers

Answer:

The answer would be B.(1/36)

Evaluate the trigonometric expression. Round your answer to four decimal places.
10 tan 20º =
a0

Answers

Answer:

3.6397

Step-by-step explanation:

10 tan (20°) = 3.6397

Solve this equation 3x-1/5-2/9x=124/5 , simply by combining like terms, Which terms can be combined? Isolate the variable term by adding this value to both sides of the equation?

Answers

Answer:

x=9

Step-by-step explanation:

x in (-oo:+oo)

3*x-((2/9)*x)-(1/5) = 124/5 // - 124/5

3*x-((2/9)*x)-(1/5)-(124/5) = 0

3*x+(-2/9)*x-1/5-124/5 = 0

25/9*x-25 = 0 // + 25

25/9*x = 25 // : 25/9

x = 25/25/9

x = 9

Answer:

1/5

Step-by-step explanation:

i got it right


Keisha solved the following equation:

4x − 2x + 8 = 6(x + 4)


Step Work Justification
1 2x + 8 = 6(x + 4) Combine like terms
2 2x + 8 = 6x + 24 Associative Property of Multiplication
3 −4x + 8 = 24 Subtraction Property of Equality
4 −4x = 16 Subtraction Property of Equality
5 x = −4 Division Property of Equality
Which step has an incorrect justification?

A: 1
B: 2
C:3
D: 5

Answers

Answer:

No 4 I think not to sure tho

Answer:

The Second One

Step-by-step explanation:

It's Supposed to be distributive Property because it's distributing the

6 into x and 4

it includes multiplication in this process so it might be confusing

Hope this helps

Can I have brainlist?

what is her answer ?

Answers

Answer:

4

lolz sorry for a late answer bud

Step-by-step explanation:

Choose the most appropriate name for the function described below.
The temperature of the coffee depends on the number of minutes it sits on
the desk.

Answers

Answer:

D. Temperature(minutes), or t(m)

Step-by-step explanation:

Option D is the correct answer.

( D.temperature(minutes), or t(m) )

Step-by-step explanation:

We are given that:

The temperature of the coffee depends on the number of minutes it sits on the desk.

i.e. the temperature(t) of coffee is a function of time in minutes (t).

i.e. times is a independent variable and temperature is a dependent variable.

Hence, the most appropriate name for the function described below is:

temperature(minutes), or t(m).

Hence, option D is correct.

Answer:

Temperature is the answer

Step-by-step explanation:

I got it right

what is being displayed ?

Answers

Answer: The answer is (2)

Just evaluate the functions with the values of the figure

Given the equations below what is the value of n/m?
m-6(n+2)=-8
6n+m=16

Answers

So what you do first is simplify the top equation

m-6(n+2)=-8
m-6n-12=-8
Add 12 to both sides to get
m-6n= 4

Next solve for m.
Add 6n to both sides
m=6n+4

Plug that into the second equation for m.

6n+(6n+4)=16

Combine like terms. 6n+6n is 12n so...

12n+4=16

Solve for n by subtracting 4 to each side

12n=16-4

12n=12

n=1

Plug n=1 into the m equation or any of the two original equations to solve for m...

6(1)+m=16
6+m=16
m=10

Since you solved for m earlier you could also do it this way:

m=6(1)+4

m=6+4

m=10

Thus your two solutions are m=10 and n=1

Hope this helps!!!!!

Answer:

M=10

n=1

Happy learning,

Applepi101

how is converting percentages to and from fractions and decimals used in daily life

Answers

Answer & Step-by-step explanation:

We use decimals every day while dealing with money, weight, length etc. Decimal numbers are used in situations where more precision is required than the whole numbers can provide. For example, when we calculate our weight on the weighing machine, we do not always find the weight equal to a whole number on the scale.

-560.114 a rational or irrational

Answers

I think it's Irrational

10 ft
8 ft
8.9 ft
4 ft
Calculate the perimeter of this figure
to the nearest tenth.
P = [? ] ft

Answers

10+8+8.9+4=30.9
Rounded to the nearest tenth is 30ft


The perimeter of a rectangular playground shown is 140 feet what is the area of the playground if the length is 40 feet

Answers

This will leave you with

140 = 2(40) + 2x

60 = 2x

30= x



So the length is 30.

The function f(x) = x + is used to complete this table.

A 2-column table with 4 rows. The first column is labeled x with entries negative 1, 0, 1, 2. The second column is labeled f of x with entries 1, three-halves, 2, five-halves.

Which statements are true of the given function? Check all that apply.

fStartFraction negative 1 Over 2 EndFraction = –2
f(0) = three-halves
f(1) = –1
f(2) = 1
f(4) = seven-halves

Answers

Answer:

b & e

Step-by-step explanation:

The statements that are true of the given function are f(0)=3/2 and f(4)=7/2. This can be obtained by finding the function and checking the values of given in the question.

Check which statements are true :

Given, f(-1/2)= -2

f(0)= 3/2

f(1)= -1

f(2)= 1

f(4)= 7/2

The function is of the form, f(x)= mx +b

where m is the slope of the line and b is the cutting point with the y axis.

For x=0, the value of the function is f(0)=3/2

b=3/2   and m=1/2

∴ The function is f(x) = (1/2)x + 3/2

f(-1/2) = (1/2)(-1/2) + 3/2 =5/4

f(0) = (1/2)(0) + 3/2 = 3/2

f(1) = (1/2)(1) + 3/2 = 2

f(2) = (1/2)(2) + 3/2 = 5/2

f(4) = (1/2)(4) + 3/2 = 7/2

Hence the statements that are true of the given function are f(0)=3/2 and f(4)=7/2.

Learn more about functions here:

brainly.com/question/32813328

#SPJ2

1. Find the measure of

Answers

Answer:

39 degrees

Step-by-step explanation:

It is shown that there is a 90 degree angle one part is given so 90-51=39 degrees.

Answer:

b = 39°

Step-by-step explanation:

The box means that it is a right angle and a right angle means it is 90 degrees.

90 degrees - 51 degrees = 39 degrees

b = 39°

Ron had some pens. 3 8 of them were black coloured, 1 4 of them were red coloured and the rest of them were blue coloured. There were 15 blue pens. How many pens did Ron have?

Answers

Answer:

40 pens

Step-by-step explanation:

Let the total number of pens Ron had be x.

We need to find the fraction of the pen that were blue.

3/8 of them were black and 1/4 of them were red. This means that the fraction of the pens that were blue is:

1 - (3/8 + 1/4) = 1 - 5/8 = 3/8

There were 15 blue pens. This means that 3/8 of x is 15:

3/8 * x = 15

x = 15 * 8/3 = 40 pens

Ron had 40 pens.

Reflect the shape B in the line y=x
please just state ALL the coordinates of the reflected shape

Answers

Answer:

See below.

Step-by-step explanation:

A reflection in y = x transforms point according to (x, y) ---> (y, x(, so:

(-1, 1) ---->   ( 1, -1).

(-3, 3) ---->  (3, -3).

(-1, 4)--->    (4, -1)

(-3, 4)-----> ( 4, -3).

Find a solution for the equation y = 4x - 3.

Answers

Answer:

y=1

Step-by-step explanation

the x is like a imaginary 1 so 4*x=4-3=1

!!Will mark Brainliest!! The points in the table lie on a line. What is the slope of the line?

Answers

Answer:

-7/6

Step-by-step explanation:

The slope of AB is -2/5. Segments CD has endpoints at C(-5,3) and D(10,-3). Are AB and CD parallel, perpendicular or neither? Justify.

Answers

Answer:

AB and CD are parallel

Step-by-step explanation:

AB has the slope of -2/5

lets see what slope the line CD has:

points are (-5, 3) and (10, -3)slope= m= (y2-y1)/(x2-x1)= (-3-3)/(10+5)= -6/15= -2/5

as we see AB and CD have same slope, therefore they are parallel

what is the measure angle of N???

Answers

[tex]answer \\ 61 \\ please \: see \: the \: attached \: picture \: for \: full \: solution \\ hope \: it \: helps[/tex]

A car costs £15000. Work out the price after a 13% discount.

Answers

Answer:

13, 050

Step-by-step explanation:

15,000 by 13% = 1,950

15,000-1,950= 13, 050

32/20 fully reduced in prime numbers

Answers

Answer:

8/5

Step-by-step explanation:

EL NUMERADOR Y EL DENONINADOR SE DIVIDEN AL MISMO TIEMPO

ENTRE LOS NÚMEROS PRIMOS EN ORDEN HASTA QUE YA NO PUEDAN

DIVIDIRSE.

1. 2x + 5 = 3x + 1
2. 3x + 2 = 4x - 3
3. 4x - 3 = 3x + 3
Pls help equations. Find x, show workings. You are the best but answer only if u know it. If I report ur answer know that that's not the right answer. Love you all.​Don't just work rubbish for points.

Answers

Answer:

1)4

2)5

3)6

Step-by-step explanation:

1)2x+5=3x+1

2x-3x=1-5

-1x=-4

x=4

2)3x+2=4x-3

3x-4x=-3-2

-1x=-5

x=5

3)4x-3=3x+3

4x-3x=3+3

1x=6

x=6

Hope it helps

Can someone please help with this question.

Answers

Answer:

54cm³

Step-by-step explanation:

V=0.5*b*h

b = 3*9 = 27cm²

h=4cm

V=0.5*4*27=54cm³

FAST ANSWER PLEASE THANKS

Answers

Answer: D

Step-by-step explanation:

(g*h)(x) is equal to g(x) times h(x). So, simply multiply them to get [tex]6x^2[/tex]

Mr. Singer's choir is going to New York City for a choir competition. He wants them to look their best, so he buys new music folders for all of the members. Each music folder costs $7.99. If Mr. Singer buys 23 music folders, how much does he spend? (Please enter your answer without units.)

Answers

Answer:

the answer is 183.77

Step-by-step explanation:

if you know the price was 7.99 for each one he bought you work multiply 23 by 7.99 and you get 183.77.

I dont understand B and C in this question so there are a deck of cards 1-10 i already got A right but B and C i dont understand
B: what is the probability of choosing a card that has a digit 1 on it
C: what is the probability that does not have a digit 1 on it? give both answers as a fraction here are the numbers to help
1 2 3 4 5 6 7 8 9 10

Answers

Answer:

see below

Step-by-step explanation:

1 2 3 4 5 6 7 8 9 10  = 10 cards

9 of them have 1 digit on them  ( 10 has 2 digits)

P( 1 digit) = number with 1 digit) / total = 9/10

P(  not have 1 digit)= number not  with 1 digit) / total = 1/10

The hard-cover edition of a book cost 3 times as much as the paperback edition. Both editions together cost $26.60. Find the cost of each.

Answers

Answer:

the hardcover is 19.95, and the parback is 6.65. enjoy.

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