Solve: 0=-x2+2x+8

[tex]0=-x2+2x+8[/tex]

Answers

Answer 1

Answer:

x = 4

x = -2

Step-by-step explanation:


Related Questions

Consider the angle 0.
What is the value of the ratio opposite/adjacent

Answers

Answer:

Step-by-step explanation:

12/5

as a mixed fraction 2 2/5

or as decimal 2.4

How do I find the volume of a solid by rotating the region bounded by the given curves about a specified line?

Answers

Step-by-step explanation:

if a region is bounded by two curves y=f(x) and y=g(x) on an internal a,b where 0<g(x)< f(x) then the volume of the solid obtained by the rotating region about the Y-axis is expressed by the integral of the difference of two functions: v= 2πbfax(x)jdx

A line passes through the points (1, 7) and (0, 3). What is its equation in slope-intercept form?

Write your answer using integers, proper fractions, and improper fractions in simplest form.

Answers

Answer:1.  you can compute the slope, m

2.  point (0,3) is the y-intercept; b=33

3.  y = mx + b, so put the numerical values in for m & b.  DON

Step-by-step explanation:

Which pair of values could NOT be the roots of a quadratic polynomial?
A) 4 and 6
B) 5 and 5
C) 2 + 3i and 2 + 3i
D) 1 + 3i and 1 –3i

Answers

Answer:

Part c

Step-by-step explanation:

In quadratic equations of real coefficients, the complex roots always occur in conjugate bases. It means, if, 2 + 3i is one of the roots and then the second root must be 2 - 3i.

The pair of values that can not be the roots of a quadratic polynomial is 2 + 3i and 2 + 3i

A polynomial is an expression consisting of the operations of addition, subtraction, multiplication of variables.

Polynomials can be classified based on degree as linear, quadratic, cubic, etc.

If the root of a quadratic polynomial is a complex number, then it must be in conjugate pairs.

The pair of values that can not be the roots of a quadratic polynomial is 2 + 3i and 2 + 3i

Find out more on polynomials at: https://brainly.com/question/4142886


At 12:45 Jimmy left his home in Pinetrees and cycled to visit his grandmother in Oakville. On his
way he stopped for 10 minutes in Rowan for a coffee and then he popped in to see his friend in
Yewton. He arrived in Oakville at 16:25. Jimmy cycled at a steady speed of 24 km/h and his
average speed for the whole journey, including the stops, was 18 km/h.
For how long did Jimmy stop in Yewton?
А
40 minutes
B
45 minutes
C
55 minutes
D
60 minutes

Answers


t=45min
d=4km

45min/60min = 0.75 hours

v=d/t
v=4km/0.75hours
v=5.33km/hour. So the answer is B. 45 minutes.

Jimmy stopped in Yewton for 45 minutes if Jimmy cycled at a steady speed of 24 km/h and his average speed for the whole journey, including the stops, was 18 km/h.

What is the distance?

Distance is a numerical representation of the distance between two items or locations. Distance refers to a physical length or an approximation based on other physics or common usage considerations.

It is given that:

At 12:45 Jimmy left his home in Pinetrees and cycled to visit his grandmother in Oakville.

Let x be the total time Jimmy stops in Yewton:

Total time for the journey = 220 minutes (12:45 to 16:25)

As we know:

distance = speed×time

24(220 - 10 - x) = 18(220)

220 - 10 - x = 165

x = 210 - 165

x = 45 minutes

Thus, Jimmy stop in Yewton for 45 minutes if Jimmy cycled at a steady speed of 24 km/h and his average speed for the whole journey, including the stops, was 18 km/h.

Learn more about the distance here:

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Which improper fraction is equivalent to 15 3/7

Answers

Answer:

108/7

Step-by-step explanation:

15*7 is 105+3 is 108/7

Round 1231.50432 to the nearest tenth

Answers

Answer:

1231.5

Step-by-step explanation:

I hope this help.

What is bigger 4.62 or 4.24

Answers

Answer: 4.62 is bigger than 4.24

Step-by-step explanation:

Who can answer this

Answers

Answer:

Check pdf

Step-by-step explanation:

Negative nine minus negative ten?

Answers

Answer:

-9 - 10 = -19

Step-by-step explanation:

If both numbers are a negative, then add them together but keep the negative or minus sign

Hope this Helps!!!

David has 54 marbles, 24 of which are black, 18 are red, and 12 are blue. What fraction represents the ratio of black marbles to blue marbles?

Answers

24/12 or 1/2 (if you want it simplified)

This is because the number of black marbles are 24 and blue marbles are 12, you can just put into a fraction like that :)

Which of the following is equivalent?

Answers

I am not sure my fault

Brandon has a points card for a movie theater. He receives 70 rewards points just for signing up. He earns 12.5 points for each visit to the movie theater. He needs 145 points for a free movie ticket. How many visits must Brandon make to earn a free movie ticket?

Answers

Answer: x=6

Step-by-step explanation:

Answer:

placeholder going to the bathroom brb

Step-by-step explanation:

This banana 8 inches How many 0.4 inch slices of banana can be cut from this banana?

Answers

Answer:

20 banna slices can be cut from a banna

Step-by-step explanation:

8 divided by 0.4 equals 20

20 slices

8 divided by 0.4 would give you an answer of 20 banana slices

5. Choose the likelihood of a probability of 50 percent.
Event: November 25th will fall on a Monday
Certain
Highly likely
Less likely
Impossible

Answers

Answer:

well, highly likely. it will always fall on a monday,

Step-by-step explanation:

if you look at all of the years it has fallen on since 2010 you will see it has  always fallen on monday.

Here is a Thought anyways im out

You know when you drop a plate and it shatters?, and if you say sorry to the plate it wont be one whole plate again... now replace that plate with someones heart. A "sorry" doesnt make a shattered heart a whole heart again.

Answers

Answer:

royal stuff

Step-by-step explanation:

I'm sorry if anyone's broken ur plate:(

Answer:

The answer is 0

Step-by-step explanation:

Deep thoughts

Bianca makes an error when she tries to write an expression equivalent to
12 + 15(3 - y) - 10y. What is the error? Fix Bianca's error.
I NEED HELP ASAPPPPPP!!!

Answers

Answer:

57 - 25y

Step-by-step explanation:

when 15 was distributed it should be '45 - 15y' instead of '45 + 15y'

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

The correct expression is

12 + 15(3 - y) - 10y

12 + 15 x 3 - 15y - 10y

12 + 45 - 15y - 10y

57 - 20y

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

Step 1:

12 + 15(3 - y) - 10y

Step 2:

12 + 15 x 3 - 15y - 10y

Step 3:

12 + 45 - 15y - 10y

Step 4:

57 - 20y

Now,

We see that,

There was an error in step 2 where instead of -15y, +15y was written.

Thus,

The correct expression is

12 + 15(3 - y) - 10y

12 + 15 x 3 - 15y - 10y

12 + 45 - 15y - 10y

57 - 20y

Learn more about expressions here:

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2/5 > 1/2 or 2/5 <1/2

Answers

Answer:

It's 2/5 <1/2.

There are 20 pieces of fruit in a bowl and 8 of them are bananas. What percentage of the pieces of fruit in the bowl are bananas?




**choose your answer from the choices on Slide 5, but you must show how you got your answer on the chart, blank drawing space below, or explain in words**

Answers

The answer is that I got was the answer .4 because the fraction is 8/20 and that as a percentage is .4

If the number 45 is multiplied by 100, In what place value will the 4 be?
thousands
tens
ones
hundreds

Answers

Answer:

thousands

Step-by-step explanation:

the number would be 4,500

every day, andrews orange juice stand uses 2 bags of oranges. How many days with 2/3 of a bag of oranges last?

Answers

Answer:

2/3

Step-by-step explanation:

can someone help me with this

Answers

90000
Haha boogaloo booga

Can someone help me

Answers

Answer:

86m²

Step-by-step explanation:

find area of triangle:

1/2 (bxh)

1/2(5x4)

1/2(20)

10

find area of rectangle:

bxh

12 x 8

96

subtract triangle's area from rectangle's area:

96-10

86

please help fr i don’t understand this

Answers

Answer:

A.    

   

Hope that helps!

Step-by-step explanation:

Answer:

the answer is A I believe good luck

Can someone please answer this question
Giving brainleist!

Answers

Answer:

a) 9000

b) 40

c) 630

d) 125

Choose Yes or No to tell if the expression is equal to 8 x 40.

Answers

no i don’t think so

help me plssssssssssssssssssssssssssssss

Answers

Answer: See explanation (btw, the answer is always in bold letters)

Step-by-step explanation:

1.) 1 gallon for $1.99

1/2 gallon for $0.98

1 gallon would be 0.98 × 2 = 1.96

2 gallons for $3.98

1 gallon would be 3.98 ÷ 2 = 1.99

2.) 621 ÷ 4 = 155.25

He pays $155.25 each payment!

3.) V = s³

s = 3

V = 3³

3 × 3 × 3 = 27

V = 27 m³

4.) This is a rectangle; the area of a rectangle is l × b.

L = 6.9

l × b = a

6.9b = 28.29

Divide both sides by 6.9

b = 4.1

The missing length is 4.1 m

5.) False

Select all equations where r=3 is a solution

R-3=0
1+ r = 2
9- r = 3
1/5r = 3
R2= 9

Answers

Answer:

the first equation

Step-by-step explanation:

can you help me please ​

Answers

Answer:

your answer will be 3.8928

Step-by-step explanation:

have a nice day bye ^_^

3.89 is the right answer believe me or not

What is the area of a circular region whose
diameter is 12 centimeters?

Answers

Answer:

A circle of radius = 12 or diameter = 24 or circumference = 75.4 cm has an area of: 4.524 × 10-8 square kilometers (km²)

The area of the circular region will be 113 square centimeters.

What is an area?

The space occupied by any two-dimensional figure in a plane is called the area. The space occupied by the circle in a two-dimensional plane is called the area of the circle.

The formula to calculate the area of the circle is given by:-

A = πr²

Given that the diameter of the circular region is 12 centimeters. The radius will be half of the diameter.

r = d / 2

r = 12 / 2 = 6

The area of the region will be calculated as below:-

A = πr²

A = π x ( 6 ) x ( 6 )

A = 113.09 square centimeters

Therefore, the area of the circular region will be 113 square centimeters.

To know more about an area follow

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