2x^2+15x=8
factor or solve as indicated, show all work.
please and thank u!​

Answers

Answer 1

Answer:  x= -8  or x = 1/2

Step-by-step explanation:

2x^2 + 15x = 8      Subtract 8 from both sides to let the whole equation equal 0

            - 8     -8

2x^2 + 15x - 8 = 0      Now find two numbers that if you multiply them, their product will be -16 and their sum will be 15. An example is the numbers 16 and -1.     16 times -1 is -16  and 16 plus -1 is 15.

Rewrite the whole equation in this form,

2x^2 +16x - 1x - 8 = 0      Factor on the left side

2x ( x + 8)  -1 (x + 8) = 0     Now factor out x + 8

 

(x + 8) (2x -1) = 0            Set each expression equal zero, because for the whole expression to equation to 0, either one of them or all of them have to equation zero.

x + 8 = 0        or   2x - 1 = 0  

  -8     -8                     +1  +1

   x = - 8                  2x  = 1

                                 x = 1/2


Related Questions

Jan and two of her friends raised money by having a bake sale. They split the proceeds. If each person received $32.19, how much money did the girls earn in total at their bake sale? Write an equation and solve it to find the answer.

Answers

Answer: 1. Equation =3x = M , where x = money each received and M= total money received.

2.total money from bake sale=$96.57

Step-by-step explanation:

STEP 1

Let the total money receive from proceeds be = M

and let the amount of money each receive after the split  = x

Since   Jan and her two friends raised the money together, the total proceeds will be calculated using the equation

x+x+x= M

3 x = M ---- Equation

STEP 2--- Solving

if 3 x= M

and x =mount of money each receive after the split=$32.19

Therefore total money from bake sale, M = 3x = 3 x 32.19 = $96.57

Answer:

The last one

Step-by-step explanation:

$96.57

PLEASE HELP ME OUT WITH THIS ONE.

A) 27 units
B) 34 units
C) 42 units
D) 37 units

Answers

The correct answer is B i think

URGENT‼️‼️
3. Find the rate of change represented in the
table.

Answers

Answer:

14

Step-by-step explanation:

Using any two ordered pairs, say (2, 17) and (4, 45),

Let,

[tex] (2, 17) = (x_1, y_1) [/tex]

[tex] (4, 45) = (x_2, y_2) [/tex]

Rate of change = [tex] \frac{y_2 - y_1}{x_2 - x_1} = \frac{45 - 17}{4 - 2} [/tex]

[tex] = \frac{28}{2} [/tex]

Rate of change = 14

What is an equation of the line that passes through the point (-2, 2) and is parallel to the line 2x + y = 1?​

Answers

2x+y=1 is in standard form so we will convert it to slope int form by subtracting 2x

y=-2x+1

the line we are finding the equation for is PARALLEL to this line here so the slope is the same

for the line’s equation we will put it in point slope form. y-y1=m(x-x1)

y-2=-2(x+2) is the answer!

An equation of the line that passes through the point (-2, 2) and is parallel to the line 2x+y=1 is y=2x+6.

Given that, the equation of a line is 2x+y=1 and the coordinate point is (-2, 2).

What is an equation of the line?

The equation of line is an algebraic form of representing the set of points, which together form a line in a coordinate system. The numerous points which together form a line in the coordinate axis are represented as a set of variables x, y to form an algebraic equation, which is referred to as an equation of a line.

In the equation of a line 2x+y=1, slope is 2.

As we know the slopes of parallel lines are equal, that is m1=m2.

Now, put (-2, 2) and m=2 in y-y1=m(x-x1) and simplify.

That is, y-2=2(x+2)

⇒ y-2=2x+4

⇒ y=2x+4+2

⇒ y=2x+6

Therefore, an equation of the line that passes through the point (-2, 2) and is parallel to the line 2x+y=1 is y=2x+6.

To learn more about an equation of the line visit:

https://brainly.com/question/14200719.

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Find the slope of the line that passes through (6,1) and (9,8)

Answers

Slope: (y2-y1)/(x2-x1)
(8-1)/(9-6) = 7/3
The slope is 7/3

Answer:

2 1/3

Step-by-step explanation:

8-1=7

9-6=3

7/3= 2 1/3

What is the solution to the system of equations graphed below? A (2, 4) B (4,2) C (0,6) D (6,0)​

Answers

Answer: (4,2)

Step-by-step explanation:

The solution would be where the two lines intersect which is the point (4,2)

Answer:

(4,2)

Step-by-step explanation:

(x=4, y=2)

the solution is the point of intersection of the graph

PLEASE HELP FAST AS A MIXED RADICAL READ IT CARFULLY BRAINLIST!

Answers

Answer:

[tex]2\sqrt[3]{2}[/tex]

Step-by-step explanation:

This is equal to [tex]\sqrt[3]{8} * \sqrt[3]{2} = 2\sqrt[3]{2}[/tex]

i though originally the answer was 1/4x+4 but tgats not it please help​

Answers

Answer:

what is that

Step-by-step explanation:

me cant see

Answer:

y = 4x

Step-by-step explanation:

You were close, its positive 4 rather than negative 4.

How do you calculate slope in pre algebra

Answers

Answer:

Find the slope from a graph

Locate two points on the line whose coordinates are integers.

Starting with the point on the left, sketch a right triangle, going from the first point to the second point.

Count the rise and the run on the legs of the triangle.

Take the ratio of rise over run to find the slope. m = rise / run.

Find the volume for 2 different spheres by randomly choosing different radii.
Using the same radii values, find the volume of 2 cylinders where the height of the cylinder is the same as the diameter of the sphere.

Answers

Answer:

The volume of a sphere of radius r is:

S = (4/3)*pi*r^3

The volume of a cylinder of radius r and height h is:

C = pi*r^2*h

For this problem the height of the cylinders will be equal to the diameter of the spheres, which is equal to two times the radius.

First, let's use the radius: r = 2.

The volume of the sphere will be:

S = (4/3)*3.14*(2)^3 = 33.49

The volume of the cylinder, where h = 2*2 = 4, is:

C = 3.14*(2^2)*4 = 50.24

Now, let's choose the radius r = 3.

The volume of the sphere will be:

S = (4/3)*3.14*3^3 = 113.04

The volume of a cylinder with this radius and h = 3*2 = 6, is:

C = 3.14*(3^2)*6 = 169.56

PLEASE HELP ME PLEASE!!

Answers

Answer:

Is that you in your pfp?

Step-by-step explanation:

Answer:

A then D then C then F thats what I see

Step-by-step explanation:

Help PLz ignore three i need help on 4

Answers

Answer:

Step-by-step explanation:

Remark

The best way to find the slope is to take the two points that are marked.

(5,3) and (0,-1)

Formula

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

Givens

y2 = 3

y1 = -1

x2 = 5

x1 = 0

Solution

m  = (3 - -1)/(5 - 0)

m = (3+1) / 5 = 4/5

the line parallel to the line in the graph  would be the new with a  slope equal to the given line.

The perpendicular to this line would have a slope of

m * m1 = -1

4/5 * m1 = - 1      Multiply by 5

4 * m = -5          Divide by 4

m = -5/4

A line perpendicular to the given line would have a slope of -5/4

If an plane can fly around the earth at the equator without stopping. It would have traveled about 24,900 miles. Find the radius of the earth.

Answers

Step-by-step explanation:

This equation gives circumference (24900 miles). Knowing this the formula to start off finding radius is

[tex]c=2\pi r[/tex]

we know c(circumference) and we know pi(3.1415926535...)

so move the numbers to isolate r(radius) to look something like this

[tex]\frac{c}{2\pi } =r[/tex]

input the known values then solve.

[tex]\frac{24900}{2\pi } =r[/tex]

[tex]\frac{12450}{\pi } =r[/tex]

[tex]3962.95808... =r[/tex]

(round this to whatever value you are looking for)

Hope This Helps :)

Mrs. Jawahir spends $9.45 on 5 greeting cards. Each card costs the SAME amount. How much did she pay for one greeting card?

Answers

Answer:

$1.89 for each Card.

Step-by-step explanation:

The answer is 1.89 because 9.45 divided by 5 is 1,89

Isabella is ordering pizza for a family dinner. If 2 pizzas will feed 4 people, how many pizzas does she need to order for 12 people?

Answers

Answer:

She needs to order 6 pizzas.

Step-by-step explanation:

(My bad I thought it was one pizza that fed 4 people not two)

Answer:

6 pizzas

Step-by-step explanation:

2pizza=4 people

12/4=3

3*2=6

Review the following information about vectors q and r.
What is the value of a?
q=(-4,1)
31
r = (a, 3)
7(q + r) = (-35, 28)
-5

Answers

Answer:  a = -1  (fourth choice)

==========================================

Work Shown:

q = (-4, 1) is one vector

r = (a,3) is another vector

The resultant vector is

q+r = (-4,1)+(a,3)

q+r = (-4+a,1+3)

q+r = (-4+a,4)

Multiply both sides by 7

7(q+r) = 7*(-4+a,4)

7(q+r) = (7*(-4+a),7*4)

7(q+r) = (-28+7a, 28)

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

Since 7(q+r) = (-35, 28), we know that,

(-28+7a, 28) =  (-35, 28)

which leads to

-28 + 7a = -35

when we equate the x components of each vector. Let's solve for 'a'

-28 + 7a = -35

7a = -35+28

7a = -7

a = -7/7

a = -1

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

Check:

q = (-4,1)

r = (a,3) = (-1,3)

q+r = (-4,1)+(-1,3)

q+r = (-4+(-1), 1+3)

q+r = (-5, 4)

7*(q+r) = 7*(-5, 4)

7*(q+r) = (7*(-5), 7*4)

7*(q+r) = (-35, 28)

The answer is confirmed.

Answer:

D. -1

Step-by-step explanation:

edge test

Kathy is 33 years old. She is 7 years younger than 5 times her daughter's age. The equation,
5x-7= 33, where x equals her daughter's age, can be used to find the age of Kathy's daughter. How
old is Kathy's daughter?

Answers

Answer:

Kathy's daughter is 8 years old

Step-by-step explanation:

What we know:

Kathy is 33 years old.

That is 7 years younger than 5 times her daughter's age.

With that, the equation 5x - 7 = 33 can be used to find x.

Step 1:

Move "- 7" to the right side of the equation, and find the opposite of it.

5x = 33 + 7

Step 2:

Add "33" and "+7" to get "40."

5x = 40

Step 3:

Divide both side by "5."

5x/5 = 40/5

x = 8

Thus, Kathy's daughter is 8 years old.

Answer:

8

Step-by-step explanation:

a research company surveys 8000 people the company expects 6000 to respond favorably if there is a percent error of 2.5% what is the Range of people who will respond Favorably to the survey !!!


please help I'm on a test rn and idk what to do !!

Answers

Answer:

Least Amount Likley: 7800

Favorable:8200

Step-by-step explanation:

Favorable 8000+2.5%

Least 8000-2.5% this is the range

Answer:

Least Amount Likely: 7800

Favorable: 8200

Step-by-step explanation:

Favorable: [tex]8000+2.5[/tex]% [tex]=8,200[/tex]

Least: [tex]8000-2.5%[/tex][tex]%[/tex]% [tex]=7,800[/tex] this is the range

hope this helps:)

i forget how to do this ​

Answers

You didn’t ummm put a picture

Need Help with this!

Answers

Answer: it's about 46.6% for the first card the second card depends on the first card if the first card is even the likelihood of the second being even is 40%, if the first card is odd then the likelihood of the second card being odd too be about 46,6%

plz help soon asap............................................

Answers

Answer:

0

Step-by-step explanation:

y=mx+b

m=0

Find the slope of a line that passes through the following
ordered pairs. Reduce to lowest terms.
(-8,-5) (-2, -5)

Answers

GAZER GAZER INNA BUILDING MANN

Answer:

I believe the answer is -6,0

Which value is equivalent to 5 + 4 x 2?

A) 11

B) 13

C) 18

D) 22

Answers

4 * 2 = 8
8 + 5 = 13
B, is the correct answer
5+8=13
USING BODMAS SO MULTIPLICATION IS FIRST c)13

Which inequality is represented by this graph?

Answers

Answer:

The answer is D

Step-by-step explanation:

The line is going to the right side so that means that x must be greater than -53 and the dot is filled in so it is also equal to

The answer is D I believe

hope this helped :)

if m*n=-12 and m+n=11 what is m? what is n?
x^2+11x-12=(x+m)(x+n)

Answers

Answer:

i think its -10

Step-by-step explanation:

hope im not wrong

The circumference of a circular lawn is 110 feet. If you double the radius, what will the new circumference be?

Answers

Answer:

220

Step-by-step explanation:

The new circumference of the circle will be 220 feet if the circumference of a circular lawn is 110 feet.

What is a circle?

It is described as a set of points, where each point is at the same distance from a fixed point (called the center of a circle)

We have:

The circumference of a circular lawn is 110 feet.

2πr = 110

r = 55/π

Double the radius:

R = 2r= 110/π

New circumference = 2πR = 2π(110/π) = 220 feet

Thus, the new circumference of the circle will be 220 feet if the circumference of a circular lawn is 110 feet.

Learn more about circle here:

brainly.com/question/11833983

#SPJ2

y=1/3x+2 and on a graph

Answers

Using the slope:1/3 and y intercept:2

Thanks guys I was needing help

Round 3.457 to
the tenths place.

Answers

Answer:

3.5

Step-by-step explanation:

If you like to round 3.457 to the nearest tenth, leaving only one number after the decimal point, then you have come to the right post.

Love, gocry

someone help plz right answer gets brainliest

Answers

Answer:

CGIA

Step-by-step explanation:

C is the first line, G is the second, I is the third, and A is the fourth.

I graphed it all. If I helped you, give me brainliest

You have a bag with 6 green marbles, 15 blue marbles, 8 red marbles, 1 yellow
marble. What is the probability of pulling out a blue marble?

Answers

Answer:

1 / 2

Step-by-step explanation:

Total # of marbles in the bag = 30

Total # of blue marbles in the bag = 15

Probability of pulling a blue marble = # of blue /  total # of marbles

Probability = 15 / 30

Simplify = 1 / 2

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