PLEASE HELP ME

Solve 2x^2-x>15

Show your work

Answers

Answer 1

Answer:

  x < -5/2  or  3 < x

Step-by-step explanation:

Subtracting 15 puts the relation into a more standard form:

  2x^2 -x -15 > 0

  (2x +5)(x -3) > 0 . . . . . factor

The zeros of these factors are x = -5/2 and x = 3.

For values of x between those values (-5/2 ≤ x ≤ 3), the product of these factors will be negative or zero. In order for the product to be positive, x must not be in that range.

The solution is ...

  x < -5/2  or  3 < x

_____

Additional comment

Several methods are taught for factoring a quadratic expression. One of my favorite is using a graphing calculator to find the zeros. If p is a zero, then (x-p) is a factor.

Another way to approach the factoring of ax^2 +bx +c is to find factor pairs of the product (ac) that have a total of b. Here, that means finding factors of 2(-15) = -30 that have a sum of -1. Consider ...

  -30 = (1)(-30) = 2(-15) = 3(-10) = 5(-6)

The sums of these pairs are -29, -13, -7, -1. With the values 5 and -6, you can rewrite the quadratic expression as 2x^2 +5x -6x -15. This can be factored by grouping pairs of terms:

  x(2x +5) -3(2x +5)

  (2x +5)(x -3) . . . . . . . the factorization we show above.

__

You can see on the graph that the quadratic is greater than 0 when x < -2.5 or x > 3.

PLEASE HELP MESolve 2x^2-x&gt;15Show Your Work

Related Questions

Andrew washed 32 car windows in 4 hours. At this rate, how many windows did he wash in 8 hours?

Answers

8 hours is twice as many as 4:

Multiply the number of windows in 4 hours by 2:

32 x 2 = 64 windows in 8 hours

Answer:

64

Step-by-step explanation:

32÷4=8 8 car windows per hour. 8×8=64

The equation 5y = 6 represents purchasing tubs of yogurt for $6. Which of these equations are equivalent to the equation 5y=6?
a 5y + 4 = 10
b 5y - 1 = 3
c 15y = 18
d 5y = 12

Answers

Answer:

blah blah

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

Emir is ordering theater tickets online for up to four of his classmates for an upcoming show. The ordering fee is $4 and the cost per ticket is $8.

Answers

Answer:

y=8x+4

Step-by-step explanation:

I am assuming you are asking for an equation.

Total cost = $8*(number of people) + $4

Alex drives at an average speed that is 1 6 of the average speed that Roy's train travels. Alex takes 20 minutes to travel 12 km in her car. Roy travels for 2 hours and 20 minutes on his train. How far does Roy travel to 2 dp?​

Answers

Answer:

336.00?

not 100% sure though

What is -0.4 times -5/6?

Answers

Answer:

0.3

Step-by-step explanation:

hopes this helps

It’s 1/30 because -0.4 x -5/6 equals to -2/5 x -5/6 which leaves you with 1/30

What is the solution to the system of equations below?

x + y = 7 and x + 2 y = 11

Answers

Answer:

x=3, y=4. (3, 4).

Step-by-step explanation:

x+y=7

x+2y=11

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

-x-y=-7

x+2y=11

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

y=4

x+4=7

x=7-4

x=3

What is the slope of a line perpendicular to the line whose equation is x-y=6x−y=6. Fully simplify your answer.

Answers

It should by the answer but if not sorry
Answer:
(X,Y)
(0,6)

Help please

Pleasssssse

Answers

Answer:

a) Draw a line horizontally on 4 on the y axis

b)x=2,y=3

The area of the triangle below is 8.91 square inches.
What is the length of the base?

Answers

Answer:

8.1

Step-by-step explanation:

Area of a triangle = ½ × base × height = Area

Rearranged =

area/1/2xheight

The base is the length.

8.91/1/2x2.2

=8.1 inches

Mr. Williams drew the following image on the board and asked his students to write a sequence of steps explaining how to construct a line which passes through point C and is perpendicular to line AB. The work of two students, Elias and Greyson, is shown.

Answers

.shown is, Greyson and Elias, students two.

Answer:

both Elias and Greyson

Step-by-step explanation:

What's the answer to this?

Answers

Hi there! Your answer would be:
•2 apples per horse
•3 apples left over

An item is regularly priced at $35. It is now priced at a discount of 55% off the regular price. What is the new price?

Answers

$15.75 because you would multiply 35 and 55 and get 1925, then divide by 100 which would get you 19.25. Then you would subtract 19.25 from 45 and get 15.75

I forgot how to do this lol

Answers

The equation of the line has the form: y = ax+b parallel to the line y = -2x + 7
=> a= -2
Passes through (4,1) => x=4, y=1
Substituting into the equation:
1= -2x(4) + b => b= 9
=> y= -2x + 9

What is 0.27845 rounded to 3 decimal places

Answers

Answer:

0.278

Step-by-step explanation:

Find 48.9% of 264.Round to the nearest hundredth

Answers

Step-by-step explanation:

Simply divide the percent by 100 and multiply by the number. For example, 48.9 /100 x 264 = 129.096 or 0.489 x 264 = 129.096

Rounded to nearest hundredth

= 129.10

Answer:129.10

Step-by-step explanation:

Simply, the equation for the percentage value of a number is:

x*(z%/100%)=y

where x is your initial value, z is your percentage value, and y is the resultant value

for this question, the equations gives us as follows

264*(48.9%/100%)=129.096=129.10

2. Which of these situations can be represented by the
opposite of -25?
A. scuba diver is 25 feet below sea level.
B. Leon gets paid $25.
C. An airplane descends 25 feet.
D. Sara has a $25 debt.
a

Answers

Answer:

B

Step-by-step explanation: Because he gains $25, which is positive

A 25 feet below sea level.

Darren got 45 out of the 60 questions correct on a test. What percent of the questions did he get correct?

Answers

Answer: To to find the percentage, you simply need to divide 45 by 60:

Step-by-step explanation:

45/60= .75

Move the decimal from the .75 over 2 times which would get you 75% on his test. So he got a 75%

Answer:

75%

Step-by-step explanation:

To find the percentage of questions Darren got correct, first create a fraction.

question's correct/total question's so 45/60

Then, convert the fraction to a percent.

45/60 = 0.75 =75%

So, Darren got 75% of the questions correct.

hope i helped

8. Determine the slope of each line,

f(x) = 3x + 6

Answers

Answer:

3

Step-by-step explanation:

Pick 2 x values to plug in:

x  = 0:        3(0)+6 = 6

x = 2:         3(2)+6 = 12

slope = (y2 - y1) / (x2 - x1)

slope = (12 - 6) / (2 - 0)

slope = 6 / 2

slope = 3

Cynthia gave 1/5 of her toys to her little sister. If she had 25 toys, how many did she give away?

Answers

Answer:

25*1/5(or 0.2)=

5

she gives a way 5 toys

Hope This Helps!!!

The number of toys that she gives away will be 5.

What is Algebra?

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

It is also known as the product. If the object n is given to m times then we just simply multiply them.

Cynthia gave 1/5 of her toys to her little sister.

If she had 25 toys.

Then the number of toys that she gives away will be given by the product of 25 and 1/5.

⇒ 25 x 1 / 5

⇒ 5

The number of toys that she gives away will be 5.

More about the Algebra link is given below.

https://brainly.com/question/953809

#SPJ2

If 4 Apple pies require 22 apples, how many pies can be made with 77apples?

IT IS WORTH 50 POINTS

Answers

14 apple pies
Explanation:
22/4= 5.5
77/5.5= 14

Answer:

14 apple pies

Step-by-step explanation:

what is the area of a hexagon inscribed in a circle with a diameter of 8

Answers

Answer:

the side = the radius for a hexagon.

so, area = 6 times the area of one equilateral triangle of side 4.

What is the slope of the line through (6,9)(6,9)left parenthesis, 6, comma, 9, right parenthesis and (7,1)(7,1)

Answers

Answer:

-8

Step-by-step explanation:

I don't really have an explenation

Answer:

y = -8x + 57

Step-by-step explanation:

hope this helps! :)

Please Can you subtract the given problem from scientific notation to notation. Step by step please​

Answers

Answer:

367(3.67*100)-16(1.6*10)=351

Hope This Helps!!!

[tex]\\ \sf\longmapsto 3.67\times 10^2-1.6\times 10^1[/tex]

[tex]\\ \sf\longmapsto 3.67(100)-1.6(10)[/tex]

[tex]\\ \sf\longmapsto 367-16[/tex]

[tex]\\ \sf\longmapsto 351[/tex]

The table below shows the price of rolls at a bakery. A baker’s dozen includes 13 rolls for the price of a dozen rolls. How much money is saved by buying a baker’s dozen instead of 13 individual rolls?

Number of rolls
6
8
Baker’s dozen
Price ($)
$3.60
$4.80
$7.20
$0.55
$0.60
$0.70
$0.75

Answers

Answer:

0.60 cents

Step-by-step explanation:

Answer: 0.60

Step-by-step explanation:

HELP ME OUT REAL QUICK!

Answers

Answer:

Step-by-step explanation:

ab abahha

2. What additional Information What additional information do you need to prove ABC = DEF by the SSS Postulate?

AC = DF
AB = DE
BC = EF

Answers

The answer is : Ab=De
We already know the other sides

30 POINTS
A fabric paint manufacturing company fills the paint in containers using a machine. The amount of paint in a container follows a normal distribution with a mean of 99 ml and a standard deviation of 5 ml. What is the probability that the quantity of paint filled is less than 100 ml? A) 0.28 B) 0.42 C) 0.58 D) 0.92

Answers

Answer:

The correct answer is C) 0.58

Step-by-step explanation:

All this is from USATESTPREP:

The function normCdf(x0, x1, , ) gives the probability that a value drawn from a normal distribution with mean and standard deviation lies in the interval [x0, x1].As the normal distribution is symmetric, the probability that a value is less than the mean is exactly 0.5P(x ≤ 100) = P(x < 99) + P(99 ≤ x ≤ 100)= 0.5 + normCdf(99,100,99,5) = 0.5793Rounded to the nearest hundredth, the probability that a container is filed with less than 100 ml is 0.58.

Please help me thank you :)

Answers

Answer:The equation is y = -x/2 - 3Step-by-step explanation:

We know the equation.

=> y = mx + b

We also know the y-intercept, which is -3.

=> b = -3.

All we need to find is the slope. Once the slope is found, our equation is set.

=> Slope = Rise/Run=> -1/2 = SlopeConclusion:

Since the slope has been found, the equation is y = -x/2 - 3.

Hoped this helped.

[tex]-BrainiacUser1357-[/tex]

A drilling team detected water 38 feet below the ground. If it took workers 8 days to be able to dig and pull up the water, how much did they dig each day on average? Form an equation

Answers

Answer: 38 divided by 8 which would equal 4.75 or 4 3/4 feet each day.

Step-by-step explanation: You divide the amount of total feet by the amount of days it took.

What angle would you use to represent 5 blue cars out of 20 cars in total on a pie chart?

Answers

Answer:

check online for more information

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