Solve for x.

x2 + 4x - 21 = 0

Answers

Answer 1
2x + 4x - 21 = 0
6x - 21 = 0
6x = 21
x=3.5

Related Questions

Find the value of x and the indicated angles.

Answers

Answer:

x = 33Indicated angles: 126°

Step-by-step explanation:

We can tell that 4x - 6 is equal to 2x + 60 because they are vertically opposite angles. Now, let's solve.

=> 4x - 6 = 2x + 60=> 4x - 2x = 6 + 60=> 2x = 66=> x = 33

Since we have found the required variable, we can now solve the indicated variables.

Given angles:

4(33) - 62(33) + 60

Let's solve 4(33) - 6 first.

4(33) - 6132 - 6126

Therefore, 4(33) - 6 measures about 126°. Now, let's solve 2(33) + 60.

2(33) + 6066 + 60126

We can clearly see that both angles are equal (126 = 126) Because of vertically opposite angles.

Conclusion:

Therefore, the required variable is 'x = 33' and when we substitute the variable in both angles, we find that both angles show 126°.

Hoped this helped.

[tex]BrainiacUser1357[/tex]

Find the Area and
Circumference of the
circle below.
מוח של
Use 3.24 for .
A=
C=

Answers

Answer:

you need to show the circumference, instead I cant help

Roxanne's dining room is 4 meters wide and 5 meters long. Roxanne wants to install a new wood floor. It will cost $8.44 per square meter. How much will Roxanne's new floor cost?

$ ____
HELPP MEE PLEASEE!

Answers

It will coast $168.8
See attached picture

For each question, find the slope and the y-intercept

Answers

Answer:

y = mx+b

Slope (m) = -4/5

y-int = 14

Hope that helps

What is the y-intercept of the equation y = 3x - 1

Answers

Answer:

you have to go over one on the y axes then 3 up that would be your answer.

your y-intercept would be -1

Which of the following equations have no solutions? Choose all answers that apply: ​

Answers

Answer:

All

Step-by-step explanation:

eight years ago mario was 25% younger than he is now how old is mario now

Answers

Answer:

32.

Step-by-step explanation:

32
this is because 25% equals 1/4 so 8 times 4 is 32

Please Help ill give brainliest!!!! Help ASAP
Question: Whose puppy gained weight the slowest? How much did it gain per week?

Answers

Answer:

Camille's puppy gained weight the slowest, because her graph does not increase as rapidly as Amit's graph. The puppy's weight increases by .5 pounds every week.

Step-by-step explanation:

Martin drank 2/3 liter of water Monday before going jogging.He drank 3/7 liter of water after his jog.How much water did Martin drank altogether?Write your answer as a mixed number.

Answers

First you need to make the denominators the same so 3 * 7 = 21 and the numerators are multiplied by the denominator of the other fraction so you get:
14/21 + 9/21 = 23/21 or 1 and 2/21 liters

A scientist counted 3,921 total eggs in
49 sea turtle nests. Each nest had about
the same number of eggs. Which is the
best estimate of the number of eggs
she counted in each eggs?

Answers

The answer is 80 eggs:) if you divide 3,921 and 80 you get 49

expand and simplify \left(4+\sqrt{2}\right)\left(6-\sqrt{2}\right) give your answer in the form of b +c \sqrt{2}

Answers

Answer:

you get 15\3 divide then you answer would be 5

Step-by-step explanation:

Use the relationship between the angles in the figure to answer the question Which equation can be used to find the value of x? Of x x+49-28 = 180
- 49 - 28 = 180
x + 49 + 28 = 180
x + 28 = 180​

Answers

Answer:

x + 49 + 28 = 180

Step-by-step explanation:

The angle adjacent to x on the left is vertically opposite 49° and is congruent.

The 3 angles then lie on a straight line and sum to 180° , that is

x + 49 + 28 = 180

NEED HELP ASAP WILL MARK BRAIN <3

A cash card has a starting value of $25. If the card is not used within the first year of its purchase, the value on the card begins to decrease by $2.50 per month.
The relationship between the number of months after the first year and the amount remaining on the card is .

The independent variable is the _____________?

The dependent variable is the ______________?

Answers

The independent variable is the number of months after the first year.
The dependent variable is the amount on the remaining card.
Y is dependent, and x is independent. This relationship can be written as y=25 x=-2.5
If there’s any questions, please don’t hesitate and text me

On a coordinate plane, a parabola opens up. It goes through (negative 8, negative 2), has a vertex at (negative 5, negative 6.5), goes through (negative 2, negative 2), and has a y-intercept at (0, 6).
Over which interval is the graph of f(x) = one-halfx2 + 5x + 6 increasing?

(–6.5, ∞)
(–5, ∞)
(–∞, –5)
(–∞, –6.5)

Answers

Answer:

The top one

Step-by-step explanation:

Hope it helps

Question 3(Multiple Choice Worth 1 points)
(01.05 LC)

Which calculation can be used to find the value of y in the equation y3 = 27?

y=y equals 27 over 3
y=y equals cube root of 27
y=y equals square root of 27 over 3
y=y equals square root of 27

Answers

Answer:

y = y is equal to 27 over 3

Step-by-step explanation:

being y3 = 27

the y3 is found by multiplying and is passed to the other side by dividing, becoming y = 27/3

find the highest common factor

Answers

Answer:

3x

Step-by-step explanation:

because both terms are common 12 and 6 is 3 and x² and x is x

What is 5 14/12 in simplest form

Answers

Answer:

the answer is probably 7/6

hope I am correct and if not I'm sorry

In the accompanying diagram, overline BA perp overline BD and overline BC perp overline BE Which statement is true?

Answers

The measure of angle 1 is equal to angle  3

From the diagram, if BA is perpendicular to BD, then;

m<1 + m<2 = 90 degrees

Similarly, if BC is perpendicular to BE, then;

m<2 + m<3 = 90 degrees

Equating both expressions will give:

m<1 + m<2 = m<2 + m<3

Subtract m<2 from both sides

m<1 + m<2 - m<2=  m<2 + m<3 - m<2

m<1 = m<3

Hence the measure of angle 1 is equal to angle  3

learn more on perpendicular lines here: https://brainly.com/question/1202004

Give the function f(x) = -2x -5, determine the value of f(-3)

Answers

Answer: 1

Step-by-step explanation: You are given the function f(x) = -2x-5. The value is (-3) which is the input of the function. The output, y is what gives 1.

Plug in -3 into the given of function of f(-3) = -2(-3) - 5 = 1.

Negative x negative is positive which -2(-3) = 6.

Take 6-5 = 1.

The above function can also be written as y = -2x-5.

The only difference is this is written in y= mx+b for and the above problem is written in function notation.

Hope this explanation helps.

Two sides of a rhombus are represented by (3X-6)cm and (x+14)cm. Find the length of each side in the rhombus

Answers

Answer:

24 cm

Step-by-step explanation:

in rhombuses, the rule is that all sides are the same length which means 3x - 6 = x + 14. then, you just have to solve this:

3x - 6 = x + 14

subtract x from both sides

2x - 6 = 14

add 6 to both sides

2x = 20

divide both sides by 2

x = 10.

to find the length of each side, plug this back into the original side length expressions:

3x - 6 becomes 3 * 10 - 6 = 30 - 6= 24 cm

the length is 24 cm.

f (x) = 3 (x– 4)^2– 12

based on this value, select ALL that APPLY for the following function:

Answers

Answer:

see explanation

Step-by-step explanation:

Given a parabola in standard form

f(x) = ax² + bx + c ( a ≠ 0 )

Then the discriminant Δ = b² - 4ac informs us about the nature of the zeros

• If b² - 4ac > 0 then 2 real and irrational zeros

• If b² - 4ac > 0 and a perfect square then 2 real and rational zeros

• If b² - 4ac = 0 then 2 real and equal zeros

• b² - 4ac < 0 then zeros are not real

Given

f(x) = 3(x - 4)² - 12 ← expand factor using FOIL

     = 3(x² - 8x + 16) - 12 ← distribute parenthesis by 3

     = 3x² - 24x + 48 - 12

     = 3x² - 24x + 36 ← in standard form

with a = 3, b = - 24 , c = 36 , then

b² - 4ac

= (- 24)² - (4 × 3 × 36

= 576 - 432      

= 144 ← a perfect square

Then 2 zeros are real and rational  and produce 2 x- intercepts

i need help please thanks ​

Answers

Answer:

D) each input has only one output.

Step-by-step explanation:

Write the equation of a line that passes through the point (-1,2) that has a y-intercept of (0,-1).

PLS HELP QUICK I NEED TO UNDERSTAND THIS I HAVE A FINAL TMRW

Answers

Answer:

The equation of a line: y = ax + b

<=> 2= -a +b => a= b - 2 (1)

<=> -1=b (2)

from (1), (2) => b= -1; a = -3

Step-by-step explanation:

Which of these is the correct root of the word judicial?

O A. jud = mankind

B. jud = book

C. jud = prophecy

O D. jud = law

SUBN

Answers

pretty sure law. judicial means of, by, or appropriate to a court or judge.

What is the slope from the equation: 2x + 9

Answers

Answer:

If you want a angle the angle is positive and the answer is M=2

Step-by-step explanation:

The answer is M=2

Which rectangle is similar to a rectangle with length of 12 yards and 23 yards?
a rectangle with length 14 yards and 13 yards

a rectangle with length 14 yards and 25 yards

a rectangle with length 2 yards and 3 yards

a rectangle with length 212 yards and 223 yards

Answers

Answer:

a rectangle with 2 yards and 3 yards

Step-by-step explanation:

12 yards and 23 yards

x and 2x - 1

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

2 and 3 = x and 2x - 1

2 and 2(2) - 1 = 2 and 3

I might be wrong.

Write your answer as a fraction in simplest form.

6+(−434)+(−218)

Answers

[tex]\huge\text{Hey there!}[/tex]

[tex]\large\boxed{\mathsf{6 + (-434) + (-218)}}\\\large\boxed{\mathsf{\rightarrow 6 \bf - 434 - 218}}\\\large\boxed{\rightarrow \mathsf{\bold{-428} - 218}}\\\large\boxed{\rightarrow \mathsf{\bf -646}}\\\large\boxed{\rightarrow \mathsf{\bold {- \dfrac{646}{1}} \approx -646\div1}}\\\\\\\large\text{We pretty much can't do anything to this so, your answer is: }\\\large\boxed{\mathsf{\bf -646}}\\\\\\\\\\\\\\\\\\\\\huge\text{Thus, your answer is: \boxed{\mathsf{-646}}}\huge\checkmark[/tex]

[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]

~[tex]\frak{Amphitrite1040:)}[/tex]

-646 is the answer

hope it help

#Chloe919

#thanks for the points

#carry on learning

I NEED ANSWER ASAPPPP

Answers

boy-7/12

girl-5/12...................

90% of _______ is 18.

Answers

90% of 20 is 18
P/s: 18/90% = 20
Ok done. Thank to me :>

Logan can make $50 per pool to clean pools during the summer to earn money. He did, however, need to
purchase some equipment to get started. After cleaning 3 pools, he was still down a total of $15.
Write a linear equation to represent the amount of money Logan has made, y, after cleaning x pools.

Answers

Answer:

Step-by-step explanation:

y = 50x - 165

Other Questions
Explain in four to five sentences the types of government Rome used to govern its citizens. "Peter Piper picked a pack of pickled peppers" is an example of a(n): *A. PersonificationB. MetaphorC. HyperboleD. Alliteration Rsum de A CHEVAL de Guy de Maupassant (rsum de environ 10 lignes) Are the equations m+3=-5 and m-4=-12$ equivalent? im in school rn and i dont understand this! need help with math probelm PLS HELP FRENCH La France sans toubibsDans l'excellent ditorial de Marie Galanti du mois de mars, intitul La France sans toubibs , il est fait mention, entre autres faits, de ce que les franais soutiennent dans l'ensemble la grve lance par les mdecins gnralistes en protestation de leurs conditions de travail et honoraires trop peu levs.Rsidant aux tats-Unis mais faisant un sjour prolong en France, j'ai eu l'occasion de parler bon nombre de gens et de pouvoir confirmer que les franais sont une forte majorit d'accord avec leurs mdecins et soutiennent leurs revendications.Il y a cependant quelques exceptions, certains franais se plaignant que la grve des mdecins met les citoyens risque . On ne pourrait pas mieux dire si on tait d'accord avec les grvistes ! En effet, cela prouve que les mdecins gnralistes sont un lment INDISPENSABLE et qu'il en va de l'intrt de tout le monde de s'assurer qu'ils puissent continuer apporter leurs soins. Or, selon les mdecins, si on observe l'horaire des 35 heures au prix des tarifs qui sont actuellement appliqus, ils sont moins bien pays que les plombiers ! Je n'ai rien dire contre des plombiers bien rmunrs, mais on ne peut comparer la longueur des tudes (6 annes plus un concours pour l'internat) et la rigueurdes tudes mdicales celles qui permettent l'obtention d'un brevet professionnel !Je pense surtout que les gnralistes la campagne font des dplacements longs et souvent dans des conditions difficiles (par tous les temps) et qu'il serait normal qu'il y ait des compensations adquates. ma connaissance, la France est un des rares pays o les mdecins gnralistes rendent encore visite leurs patients au lieu de les recevoir sur rendez-vous dans leur cabinet mdical, comme c'est le cas, par exemple, aux tats-Unis o j'ai fait personnellement l'exprience d'avoir eu me dplacer avec une fivre de cheval, un cas de bronchite aigu, pour aller consulter mon mdecin.Les franais ont donc beaucoup de chance d'avoir encore des mdecins qui se dplacent domicile et ils devraient soigner leurs gnralistes, et en prendre soin comme d'une espce en voie de disparition pour assurer la continuit d'un tel luxe.Albert Salazot Courrier lectroniqueCourrier des lecteurs Journal Franais Avril 2002Questions: 1- Selon l'article, pourquoi est-ce que les toubibs (docteurs) font-ils la grve?2- Pour quelle raison, certains franais sont-ils contre la grve?3- Que font les gnralistes la campagne, qui est difficile?4- Quest-ce qui est unique propos des docteurs en France? PLSS HELPPP WITH MATH Rewrite this equation below into Slope-intercept form y-10=2/3(x-3) HELP ME PLEASEEEE I WILL GIVE BRAINLIEST the two ways that a corporation can be classified by ownership are What is the opposite of 3.5? Write your answer as a decimal what types of life developed during the paleozoic? PLS HELP i will mark brainliest How did the Liverpool-Manchester Railroad that opened for business in 1830 differfrom previous railroads?A. It brought coal from the Yorkshire mines to a steel factory.B.It transported paying citizens in passenger cars between cities.C.It linked southern England with the northern half of the country.D.It transported agricultural products from the countryside to major cities.Answer:Which of the following are results from the development of British railroads? Choosethe three correct answers.A.created thousands of mining jobsB. improved living conditions for the poorC.lowered the cost of transporting goodsD.encouraged people to travel for leisureE. increased the size of the rural populationF. allowed for soldiers to travel to battlefields fasterAnswer: 3] What is - 2y + 10 + 2y - 8 simplified?a) 4y + 18C) 18b) 4y + 2d) 2Expressions What are some similarities and differences between an angiosperm and a gymnosperm? PLEASE What equipment is generally used to make lyophilized medications suitable for administering to the patient? a) Test tubes or sterile ampules O b) Petri dishes and sterile droppers c) Sterile syringes or graduated cylinders d) Measuring cups and clean, warm water plz answer!!!!!!!!!!!!!! Why is China predicted to grow faster than many other economies?