Factor 4x^2-4x-8
Please help

Answer:

86 degrees

Step-by-step explanation:

180 - (74 + 20) = 86

Answer:

Step-by-step explanation:

No they are not because-

1x12=12 so that SHOULD mean that

2x12=16 but in reallity 2x12=24

Thank you for asking!

Answer:

\( \sf \: 4x + 3 \)

Step-by-step explanation:

Given expression,

→ (-3x + 5) - (-7x + 2)

Let's simplify the expression,

→ (-3x + 5) - (-7x + 2)

→ -3x + 5 + 7x - 2

→ (-3x + 7x) + (5 - 2)

→ (4x) + (3)

→ 4x + 3

Hence, the answer is 4x + 3.

10x +7

because minus and minus equals plus 7x + 3x equals 10x and 2 plus 5 is 7

Answer: 7 miles/h and 1 miles/h

Step-by-step explanation:

With the speed of current = x + 1

Against the speed of current = x - 1

ATQ

4(x-1) = 3(x+1)

4x-4 = 3x+3

4x - 3x = 3+4

x = 7

Speed of boat = 7miles/h

Current of river = 1 miles/h

please click thanks and mark brainliest if you like :)

Answer:

Hello,

Boat speed=7 miles/h

Current speed = 1 mile/h

Step-by-step explanation:

I am going to try to explain.

Let say V the speed of the boot (V like vitesse in french)

Let say v the speed of the current.

distance=24 miles

\(\left\{\begin{array}{ccc}V-v&=&\dfrac{24}{4} \\V+v&=&\dfrac{24}{3} \\\end{array}\right.\\\\\left\{\begin{array}{ccc}V-v&=&6 \\V+v&=&8 \\\end{array}\right.\\\\Adding\ the\ 2\ equations\ and\ substracting\ them \\\\\\\left\{\begin{array}{ccc}2V&=&14 \\2v&=&2 \\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}V&=&7 \\v&=&1 \\\end{array}\right.\\\\\)

Boat speed=7 miles/h

Current speed = 1 mile/h

Answer:

25%

Step-by-step explanation:

He got $200 discount, as 200/800 * 100%= 25%

There are 4660194 metric ton of water fell on the city.

According to the statement

we have to find that the How many metric tons of water fell on the city.

And for this purpose, we know that the

From the given information:

Time period - 2hours

And A storm dumps 1.0 cm of rain on a city 6km wide and 8km long.

So,

we know that the

1 cm = 0.01 m

6 km = 6000 m

8 km = 8000 m

Now, the volume becomes

Volume of water = 0.01 m x 6000 m x 8000 m =  480000 m³

480000 m³ = 480000000 kg of water (density of water = 1000kg/m³)

103 kg = 1 metric ton

480000000 kg = 480000000 / 103 = 4660194 metric ton.

So, There are 4660194 metric ton of water fell on the city.

Learn more about volume here

https://brainly.com/question/1972490

#SPJ4

there are 10 people standing equally spaced around a circle. each person knows exactly 3 of the other 9 people then there are 10 possible ways

there are 10 people standing equally spaced around a circle. each person knows exactly 3 of the other 9 people:

There is only $1$ way to do this.

Thus, in total there are $2+5+5+1={(C) }13}$ possible ways.

learn more about of circle here

https://brainly.com/question/11833983

#SPJ4

The point of intersection between the given plane and the line perpendicular to the plane and passing through (8, 4, 3) is (-4, -14, 9).

To find the point of intersection between a plane and a line, we need to know the equation of the plane and the equation of the line.

Given:

Plane equation: ax + by + cz = d

Line equation: P = P₀ + tV

To find the point of intersection, we can substitute the line equation into the plane equation and solve for the parameter 't'.

Let's assume the plane equation is:

2x + 3y - z = 4

And the line equation passing through (8, 4, 3) and perpendicular to the plane can be represented as:

P = (8, 4, 3) + tV

First, we need to find the normal vector of the plane. From the coefficients of x, y, and z in the plane equation, we can determine the normal vector as (2, 3, -1).

Since the line is perpendicular to the plane, the direction vector 'V' of the line will be the same as the normal vector of the plane. Therefore, V = (2, 3, -1).

Substituting the values into the plane equation:

2(8) + 3(4) - 1(3) + t(2) + t(3) + t(-1) = 4

Simplifying the equation:

16 + 12 - 3 + 2t + 3t - t = 4

28 + 4t = 4

4t = -24

t = -6

Now, substitute the value of 't' back into the line equation to find the point of intersection:

P = (8, 4, 3) + (-6)(2, 3, -1)

P = (8, 4, 3) + (-12, -18, 6)

P = (-4, -14, 9)

Learn more about plane here: https://brainly.com/question/27190150

#SPJ11

Answer:

220 mph ; 230 mph

Step-by-step explanation:

Given that :

Speed of First boat = x

Speed of Second boat = y

y = (10 + x) mph

Distance apart after 3 hours = 150 miles

Speed of the boats :

Speed / time = distance

First boat distance = x / 3

Second boat distance = (10+x) /3

x/3 + (10+x)/3 = 150

x + 10 + x = 150 * 3

2x + 10 = 450

2x = 450 - 10

2x = 440

x = 220 mph

Speed of second boat = 220 + 10 = 230 mph

Answer i think b, and f.

Step-by-step explanation:

Let me know if i am wrong.

Answer:

The answer is C. Decide what the variable will represent. Decide what the constant will represent. Use the inequality symbol to determine the relationship between the variable and the constant. Write a statement using the same relationship. An example is “Alva spent less than $9.”

Step-by-step explanation:

I did the quiz. :D

Decide what the variable will represent. Decide what the constant will represent. Use the inequality symbol to determine the relationship between the variable and the constant. Write a statement using the same relationship. An example is “Alva spent more than $9.”This describes the correct method to write a statement to match this inequality.

What is inequality?

In mathematics, an inequality is a relation which makes a non-equal comparison between two numbers or other mathematical expressions. It is used most often to compare two numbers on the number line by their size.

According to questions, Matteo wants to write a statement that can be represented by the inequality p less-than 9.

We have to find which describes the correct method to write a statement to match this inequality.

To write a statement to match this inequality.

We have to decide what the variable will represent.

We have to decide what the constant will represent.

Then we have to use the inequality symbol to determine the relationship between the variable and the constant.

Then we have to write a statement using the same relationship.

An example is “Alva spent more than $9.”

Hence, we conclude that  to write a statement to match this inequality.

We have to decide  what the variable will represent. Decide what the constant will represent. Use the inequality symbol to determine the relationship between the variable and the constant. Write a statement using the same relationship. An example is “Alva spent more than $9.”

Learn more about inequality here:

https://brainly.com/question/25285332?referrer=searchResults

#SPJ2

Answer:

Adding Fractions: If the denominators are not the same, you must find the common denominator by finding the least common multiple (LCM). Subtracting Fractions: If the denominators are not the same, you must find the common denominator by finding the least common multiple (LCM).

The average rate of change, in simplest form, is -2/5.

What is average rate ?

Divide the change in y-values by the change in x-values to determine the average rate of change. Identifying changes in quantifiable parameters like average speed or average velocity calls for the knowledge of the average rate of change.

The rate of change of the function is its gradient or slope.

The formula for calculating the gradient of a function is expressed as:

\(m=\frac{d y}{d x}=\frac{y_2-y_1}{x_2-x_1}$$\)

Using the coordinate points from the table (0,41) and (15,35)

Substitute the coordinate into the expression:

\($$\begin{aligned}& m=\frac{35-41}{15-0} \\& m=\frac{-6}{15} \\& m=\frac{-2}{5}\end{aligned}$$\)

To learn more about average rate visit:https://brainly.com/question/3605446

#SPJ1

Answer:

A, B, D, E, F

Step-by-step explanation:

The only set that only has rational numbers is the first one:

{1/3, -3.45, √9}

A rational number is a number that can be written as the quotient of two integers.

If we look at the first set, the elements are:

In the other sets we can see elements like:

√37, √44, or √2 which are all irrational numbers, then the only correct option is the first one.

If you want to learn more about rational numbers:

https://brainly.com/question/12088221

#SPJ1

Answer:

$2.09

Step-by-step explanation:

3.8 x .55 = 2.09

Answer:

9:00

Step-by-step explanation:

Answer:

36 square units

Step-by-step explanation:

The figure is made up of a rectangle above with length 6 and width 4.

The bottom part is a triangle with a base of 6 and a height of 4.

total area = area of rectangle + area of triangle

total area = LW + bh/2

total area = 6 × 4 + 6 × 4/2

total area = 24 + 12

total area = 36

Answer:

36 square units

Step-by-step explanation:

We can split the given figure into two familiar figure by drawing a line segment as shown in the attached figure

This splits the composite figure into a rectangle at the top and an inverted triangle at the bottom

The rectangle has a length(horizontal portion) of 6 units and a width(vertical portion) of 4 units

Area of rectangle = length x width = 6 x 4 = 24 square units

The triangle has a base of 6 units and a height of 4 units

Area of rectangle = 1/2 x base x height = 1/2 x 6 x 4 = 1/2 x 24 = 12 square units

Area of figure = 24 + 12 = 36 square units

Answer:

5

Step-by-step explanation:

Since DE is tangent to the circle, that means DE is perpendicular to EF

==> DF = sqrt(4^2+3^2) = 5

Answer:

B) 2.8 with line on top

Step-by-step explanation:

Here I will show you step-by-step with detailed explanation how to calculate 26 divided by 9 using long division.

Before you continue, note that in the problem 26 divided by 9, the numbers are defined as follows:

26 = dividend

9 = divisor

Step 1:

Start by setting it up with the divisor 9 on the left side and the dividend 26 on the right side like this:

\(\sqrt[9]{26}\)

Step 2:

The divisor (9) goes into the first digit of the dividend (2), 0 time(s). Therefore, put 0 on top:

\(\\ \sqrt[9]{26} ^0\)

Step 3:

Multiply the divisor by the result in the previous step (9 x 0 = 0) and write that answer below the dividend.

       0    

   9 ⟌ 2 6  

       0    

Step 4:

Subtract the result in the previous step from the first digit of the dividend (2 - 0 = 2) and write the answer below.

       0    

   9 ⟌ 2 6  

     - 0    

       2    

Step 5:

Move down the 2nd digit of the dividend (6) like this:

       0    

   9 ⟌ 2 6  

     - 0    

       2 6  

Step 6:

The divisor (9) goes into the bottom number (26), 2 time(s). Therefore, put 2 on top:

       0 2  

   9 ⟌ 2 6  

     - 0    

       2 6  

Step 7:

Multiply the divisor by the result in the previous step (9 x 2 = 18) and write that answer at the bottom:

       0 2  

   9 ⟌ 2 6  

     - 0    

       2 6  

      1 8  

Step 8:

Subtract the result in the previous step from the number written above it. (26 - 18 = 8) and write the answer at the bottom.

       0 2  

   9 ⟌ 2 6  

     - 0    

       2 6  

     - 1 8  

         8  

You are done, because there are no more digits to move down from the dividend.

The answer is the top number and the remainder is the bottom number.

Therefore, the answer to 26 divided by 9 calculated using Long Division is:

2

8 Remainder

2.88888888889

The limit is :lim x→[infinity] x tan(2/x)= 2

To determine the limit:

lim x→[infinity] x tan(2/x)

Using derivatives, the L'hospital rule can be used to evaluate limits involving indeterminate forms.

A limit with an ambiguous form is one that does not provide enough information to determine the original limit.

It is a crucial rule in Calculus.

We can use derivatives to find the value of certain types of limits using this rule.

L'Hospital's rule can be applied.

To do so, we take the denominator's and numerator's derivatives with respect to x.

lim x→[infinity] x tan(2/x)

= lim x → ∞ tan(2/x)/1/x

[as x → ∞, 1/x→0]

=>2 lim 1/x → 0  tan(2/x)/2/x

=> 2 lim Ф → 0 sec²2Ф

=> 2× sec²0

=> 2

Therefore,

lim x→[infinity] x tan(2/x)= 2

learn more about  L'hospital's rule

brainly.com/question/14105620

#SPJ12

Answer:

cot(x)=-sqrt(3)/3

Step-by-step explanation:

I'm going to use the Pythagorean Identity sin^2(x)+cos^2(x)=1 to find the sine value since cotangent value is the cosine value over sine value.

Plug in:

sin^2(x)+(-1/2)^2=1

Simplify:

sin^2(x)+1/4=1

Subtract 1/4 on both sidea:

sin^2(x)=3/4

Square root both sides:

sin(x)=sqrt(3)/2. [Sine is positive since x is in 2nd quadrant]

cot(x)=(-1/2)/(sqrt(3)/2))

cot(x)=-1/sqrt(3)

Rationalize denominator by multiplying by sqrt(3)/sqrt(3):

cot(x)=-sqrt(3)/3

cot(x)=

Answer:

8.89

Step-by-step explanation:2.45+2.45=4.90 and 4.90+399=8.89

The reliability of the given statement "a researcher finds that people's scores on a measure of extroversion stay stable over 2 months after repeat measures." is  test-retest reliability

Test-retest reliability is a type of reliability testing that assesses the consistency of results obtained from the same measurement tool administered to the same group of people at different times.

It ensures that the results obtained from the same measurement tool at different times are consistent, which increases the validity of the findings.

In this case, the researcher can have confidence that the measure of extroversion used is reliable, and the scores obtained are an accurate representation of the participants' level of extroversion.

In conclusion, test-retest reliability is a crucial type of reliability testing used in research to ensure the consistency and stability of results obtained from the same measurement tool administered to the same group of people at different times.

To know more about reliability here

https://brainly.com/question/30154360

#SPJ4

Answer:

69.9°

Step-by-step explanation:

sin28/11 = sinx/22

22(sin28) = 11(sinx)

sinx = 22(sin28) / 11 = 0.9389

x = sin⁻¹(0.9389) = 69.9°

Answer- 33

We are told that A=6, there for we can right out our equation fully.

(5 x 6)+3. Our multiplication sentence with go in parentheses ( ) so we know to do that part of our equation first.  5 times 6 is 30. After we multiply we add our outside number(s). 30 plus 3 is 33. Which means the solution to the equation is 33.

5a +3= 33 or (5x6) +3 = 33

Hope this helps! and GOOD LUCK.