Solve the 2x^2 - 5 = 13

Answers

Answer 1

Answer:

x=3

x=−3

Step-by-step explanation:

2x^2 - 5 = 13

Subtract 13 from both sides.

2x^2 - 5 - 13 = 0

Subtract 13 from −5 to get −18.

2x^2 - 18 = 0

Divide both sides by 2.

x^2 - 9 = 0

Consider x^2−9. Rewrite x^2−9 as x^2−3^2. The difference of squares can be factored using the rule: a^2−b^2=(a−b)(a+b).

(x−3)(x+3)=0

To find equation solutions, solve x−3=0 and x+3=0.

x=3

x=−3


Related Questions

Solve the following quadratic equation for all values of x in simplest form.
3(4x + 1)2 – 37 = 5

Answers

Answer:

Step-by-step explanation:

Add 37 to both sides (to combine like terms):

3(4x + 1)^2 = 42

Reduce this by dividing both sides by 3:

(4x + 1)^2 = 14

Taking the square root of both sides results in:

4x + 1 = ± √14, or

4x = -1 ± √14

Solve for x by dividing both sides by 4:

       -1 ± √14

x = ----------------

              4

SOLVE

1. Afton made a chicken dish for dinner. She added a 10 - ounce package of vegetables and a 14- ounce package of rice to 40 ounces of chicken. What was the total weight of the chicken dish in pounds?
__________________________________________________________________

2. A jar contains 26 fluid ounces of spaghetti sauce. How many cups of spaghetti sauce do 4 jars contain?
__________________________________________________________________

3. Coach kent brings 3 quarts of sports to drink to soccer practice. He gives the same amount of the drink to each of his 16 players. How many ounces of the drink does each player get?
__________________________________________________________________

4. Leslie needs 324 inches of fringe to put around the edge of a tablecloth. The fringe comes in lengths of 10 yards. If Leslie buys 1 package of fringe how many feet of fringe will she have left over?
_________________________________________________________________

5. An office supply company is shipping a case of wooden pencils to a store. There are 64 boxes of pencils in the case. If each box of pencils weighs 2.5 ounces, weight, in pounds, of the case of wooden pencils?
__________________________________________________________________

Answers

Answer:

Step-by-step explanation:

Numer 1:  The answer to this problem is 4 pounds

Numer 2: 13 cups

Explanation:

Four jars of sauce with 26 oz would be a total of 104 ounces

4 x 26 = 104

1 cup contains 8 ounces.

104 oz x [tex]\frac{1cps}{8oz}[/tex]=13 cups

Numer 3: Since,  1 quartz = 33.307 ounces ( approx )

⇒ 3 quartz  = 99.921 ounces

If the total number of players = 16,

And, the given fluid is divided equally among these players,

Then the total quantity of fluid each player get

[tex]\frac{toral quality od drink }{ total players}[/tex]

=[tex]\frac{99.921}{16}[/tex]

=6.24505625= 6.245

Hence, each player will get around 6.245 ounces of the drink.

Number 4:

36 inches or 3 feet is the correct answer

Number 5 ;

The correct answer for the question that is being presented above is this one: "10 pounds." An office supply company is shipping a case of wooden pencils to a store. There are 64 boxes of pencils in the case. If each box of pencils weighs 2.5 ounces, then...

There are:  

64 boxes of pencils

1 box weighs 2.5 ounces

Find its total weight in pounds.

1 ounce = 0.0625 pounds

64 boxes * 2.5 ounces = 160 ounces

160 ounces * 0.0625 pounds/1 oz = 10 pounds.

The 64 boxes of pencils weigh 10 pounds.

Someone plz help me I will give brainliest

Answers

Answer:

A

Step-by-step explanation:

Note: "of" is a great indicator of multiplication in math problems.

In option A, Lily eats [tex]\frac{3}{8}[/tex] of the grapes, and there are 4 grapes, so we know it is

(3/8)*4 or 4*(3/8)

In the other options the "of" is followed by a unit that is not 4, such as a foot, a mile, and an hour.

at a light bulb manufacturing plant 2% of the light bulbs are found to be defective if the plant have 56 defective lightbulds on a certain day how many did it manufacture that day

Answers

Answer:2800

Step-by-step explanation:

So 2 percent is 2/100 or 1/50 so just multiply 56 by 50 and you will get 2800

How is the graph of y=1/2(5)^x-3 translated from the graph of y=1/2(5)^x?

Answers

Answer:

the graph is translated to the right by 3

Step-by-step explanation:

Ignore that bottom but help pleaseee

Answers

The answer is 49 because it is

5x/7-5=50 plsssssssssss noBOTS

Answers

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Answer: x=77

Explanation:

5x/7 - 5 = 50

5x/7 = 55

5x = 385

x = 77

I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer:

5x/7 - 5 = 50

5x/7 = 50+5

5x/7=55

5x=55x7

5x = 385

x=385/5

x=77

area of right triangle

Answers

base is 4 units
height is 6 units
6 x 4 = 24
24/2 = 12 units

Whats 4 + 4 + 8 + 8 + 10 + 16 + 50 x 10 = ?

Answers

Answer:

550

4 + 4 + 8 + 8 + 10 + 16 + (50 x 10)

Step-by-step explanation:

Answer:

550 is the answer

..............

i need help please think before you answer

Answers

Answer:a^2

Brailniest if this helped ;)

Also the ^ means an exponent just so you know

PLEASE HELP, I NEED THIS OR I WILL FAIL MY CLASS PLZZZZ.
30 POINTS AND BRANNIEST
( PLEASE SHOW WORK OR I MIGHT NOT GIVE BRAINIEST )

Answers

Answer:

3

Step-by-step explanation:

i dont know how to show the work i did it in my head

Please help me with this question, will mark brainliest if correct, PLEASE HURRY, no links or you'll be reported :)

Answers

Answer:

Given

ΔTQR is rightQS is altitudeΔRSQ and ΔTSQ also rightm∠TQS = 42°, RS = 26 cm

∠RQS and ∠TQS are complementary with ∠TQS, so are 48°

a)

∠QRS is the another one with 42°

b)

Find QS first

26/QS = tan 48°QS = 26 / tan 48° = 23.4

Find QT next

QS/QT = cos 42°QT = QS / cos 42° = 23.4 / cos 42° = 31.5 (rounded)

Compare: 2.25 O 2.26

Answers

The last digit in the decimal is bigger the answer is

Answer:

2.26 is bigger than 2.25

Step-by-step explanation:

you can compare it like money

so for example , $2.26 > $2.25 because

in dollars 2.26 dollars is more.

Solve for v.
20 = 4 x v

v = ??

Answers

Answer:

v = 5/x

Step-by-step explanation:

Hope this helped

Answer: v=5

→Hope this helps!←

round the number 2788.32 to the nearest whole number

Answers

2788 would be the answer since 0.32 would round down so its 2788

hooga hooga. Hooga gooha

Answers

what LDODJDJJ i’m confused but ight

SOMEONE PLEASEEEEE HELPPPPPP

Answers

9514 1404 393

Answer:

  x = 16

Step-by-step explanation:

The angle bisector divides the sides proportionally.

  (x -4)/9 = x/12

  4(x -4) = 3x . . . . . . . multiply by 36

  x = 16 . . . . . . . . . . . . add 16-3x to both sides, simplify

IM GIVING BRAINLIEST!!!PLEASE HELP!!!

Answers

The answer is C (2,-4).

The answer is C aka answer 3

anybody know the answer?

Answers

Answer:

Option B

Step-by-step explanation:

As,

It has shown that line c cuts line b by making 90° so those lines are called perpendicular bisectors .

Hence,

Option B is the correct symbol shown for perpendicular bisector of line c to line b.

Yes or no???????????????

Answers

It is a right triangle.

yes, pythagorean theory a^2 + b^2 = c^2
36^2 + 77^2 = 7225
85^2 = 7225
(c is the biggest length)

What are roots of quadratic equations?​

Answers

Answer:

Here's a link that I found that was helpful to me: http://www.biology.arizona.edu/biomath/tutorials/quadratic/roots.html#:~:text=Roots%20are%20also%20called%20x%2Dintercepts%20or%20zeros.&text=The%20roots%20of%20a%20function,%2B%20bx%20%2B%20c%20%3D%200.

Step-by-step explanation:

I need help now! Someone

Answers

I’m working on the same thing as well

Answer:

210

Step-by-step explanation:

Hi,

Split this up. Find the area of the rectangle first. To find the area of the rectangle, you need to multiply the L x W

So...

L x W

18 x 10

Area: 180

Now, you need to find the area of the two right triangles. For the first one, to find the area, it's 1/2bh.

So...

We know that 24 - 18 will give us the length of the right triangle. We get...  6 ft.

So...

1/2 (6) (5)

We get 15.

Since both right triangles are the exact same, the other right triangle will also equal 15ft.

Now, add all of the shapes.

15 + 15 + 180 = 210

Your total area is 210.

I hope this helps :)

The height of a cylinder is 8 centimeters. The circumference of the base of the cylinder is 14 pi. What is the measurement of the volume of the cylinder in cubic centimeters? Round to the nearest tenth.

Answers

Answer:

15

Step-by-step explanation:

HELP ME ASAP!!!!!!!


WINNER GETS BRAINLIEST, THANKS AND A STAR RATING OF EXCELLENT!!!!!!!


Please friend request me and I'll accept

Answers

Answer:

3hours and 30 minutes moving and 2 and a half hours stationary

Step-by-step explanation:

1 hour + 30 minutes + 1 hour + 30 minutes + 30 minutes for moving

1 hour + 1 hour + 30 minutes for stationary.

One cube has edge length of 3 cm. A larger cube has edge length of 8 cm. What is the ratio of the surface area of the smaller cube to the surface area of the larger cube in the simplest​ form?

Answers

Answer:

54:384

the simplest form is 9:64

PLEASE HELP ME WITH THIS!! ;(

Answers

Answer:

Zoom in and mark me as brainliest

Number 7 please help 10 points no links pleAse

Answers

Answer:

Option C : 25

Step-by-step explanation:

Given,

Number of rainy days = 18

Number of cloudy days = 14

Number of sunny days = 29

Therefore,

Number of days either sunny or cloudy = 14 + 29 = 43

So,

Number of more days sunny or cloudy than rainy are

= 43 - 18 = 25

Hence,

Option C 25 is the correct answer.

Neeed help please???????!!!!!!

Answers

Arc HKJ for one but I do known abt 2

Help ASAP please help me easy question hurryyyyy please ASAP please please

Answers

Please find the attached photograph for your answer

URGENT I NEED ANSWER WITH WORK
All the students in the 6th grade either purchased their lunch or brought their lunch from home on monday. 24% of students purchased lunch and 190 students brought lunch from home. How many students are in the 6th grade?
a 76
b 166
c 214
d 250

Answers

Answer: 250 students.
Step-by-step explanation:
Let x students in 6th grade either purchased their lunch or brought their lunch from home on Monday.
According to the question,
24% of the students purchased their lunch.
⇒ (100-24)% of the student brought their lunch from home.
⇒ 76 % of the student brought their lunch from home.
But, Again according to the question,
190 students brought their lunch from home.
⇒ 76 % of x = 190

⇒ x = 250
Therefore, there are total 25 students in the 6th grade.
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