Mia is factoring the polynomial
x^2+4x−12. She uses the steps shown.

x^2+4x−12
Step 1
x^2+6x−2x−12
Step 2
(x^2+6x)−(2x+12)
Step 3
x(x+6)−2(x+6)
Step 4
(x+6)(x+2)
In which step did Mia make an error?

Answer:

93.73

Step-by-step explanation:

72.1

x 1.3

_____

93.73

Answer:

The expression is 1.07d.

The range for both groups are the same, therefore: C. The variability in students’ heights of both groups is the same.

To find the mean of a data set, sum all data points given together and divide what you get by the number of data points that is given in the data set.

The range of a data gives us an idea of the spread of a data, which is a measure of variability. The larger the range, the more the variability that exist in the data set.

Given, Group A: 51, 53, 60, 64, 55, and Group B: 50, 55, 58, 63, 52, find the mean of each data set

Mean for Group A = (51 + 53 + 60 + 64 + 55)/5 = 283/5 = 56.6

Mean for Group B = (50 + 55 + 58 + 63 + 52)/5 = 278/5 = 55.6

Range for Group A = 64 - 51 = 13

Range for Group B = 63 - 50 = 13

This means that variability in students’ heights is the same for both group A and B.

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Answer: their difference in elevation is 188 feet

Step-by-step explanation:

Answer:

[-5 3] [-5 6]

Step-by-step explanation:

Answer:

Your answer is on the pic...mate

When counting the number of successes in n trials, the (D) binomial distribution should be used if the success probability, p, stays constant from trial to trial.

As it is given in the descrip[tion itself that the probability of observing a specific number of successful outcomes in a specific number of trials is determined by the binomial distribution.

Therefore, when counting the number of successes in n trials, the (D) binomial distribution should be used if the success probability, p, stays constant from trial to trial.

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The complete question is given below:

Which distribution is appropriate when counting the number of successes in n trials if the probability of success p remains constant from trial to trial?

(A) Normal Distribution

(B) Power Normal Distribution

(C) Extreme Value Type Distribution

(D) Binomial Distribution

Answer:

[tex]f {}^{ - 1} (x) = - x - 2[/tex]

cosine = adj/hypt.

inverse of cosine = arccosine

arccosine(6/22) = 74.34

Answer:

Exact Form:

37/16

Decimal Form:

2.3125

Mixed Number Form:

2 5/16

Step-by-step explanation:

Answer:200 in^2

Step-by-step explanation:

Answer:

x<3

Step-by-step explanation:

4x<5+7

4x<12

x=12÷4

x=3

If your train travels at 65 miles per hour for 3.5 hours, it go 227.5 miles.

What is Speed ?

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, velocity is a vector, whereas speed is a scalar value.

Given:

Speed S = 65 miles per hour

Time T = 3.5 hours

We know that,

S= D/T  Where D is the distance traveled.

Therefore,

65 miles per hour = D/ 3.5 hours

D = 65 x 3.5 miles

=227.5 miles

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The 100 km difference between the two cities takes two trains to pass each other in 5 hours.

The relationship between speed, distance, and time is described using the formula of speed, distance and time.

That is speed = distance/time.

The velocity of an object in relation to another observer is referred to as the relative speed.

Given:

A train departs from city A and moves toward city B at a constant speed of 60 km/h and time taken is 8 hours.

At the same time, a second train departs city B and heads toward city A at a constant speed of 40 km/h.

The relative speed of first train with respect to the second train                                  = 60-40

= 20 km/h

It is given that the two cities A and B are located 100 kilometers apart from one another.

So, distance between both cities = 100 km

By using the speed formula,

Speed = Distance/Time

Time = Distance/Speed

Time = 100/20

∴ Time = 5 hours

Consequently, it takes 5 hours for the two trains to pass one another with 100 km distance between two cities.

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Considering when a triangle is formed given three sides, the code for the puzzle is given as follows:

BBBACC

In a triangle, the sum of the lengths of the two smaller sides of the triangle has to be greater than the length of the greater side of the triangle.

For the first letter, we have two sides, hence there are many possible values for the third side x, as long as 2.5 + x > 8, for x < 8 or x < 10.5, for x > 8, hence the first letter of the code is of B.

For the second letter, 4 + 7 < 19, hence no triangle can be formed with these dimensions and the letter is of B.

For the third letter, 2 + 4 > 5, hence one unique triangle can be formed with all the dimensions given and the letter is of B.

For the fourth letter, 6 + 8 > 12, hence one unique triangle can be formed with all the dimensions given and the letter is of A.

For the fifth letter, we have two sides, hence there are many possible values for the third side x, as long as 1 + x > 2.4, for x < 2.4 or x < 3.4, for x > 2.4, hence the letter is of C.

For the sixth letter, 5 + 9 > 13, hence one unique triangle can be formed with all the dimensions given and the letter is of C.

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A property map is drawn at a scale of 1:1000, if the distance between two points on the map is 4.9cm. then the actual distance is = 4.9 * [tex]10^{3}[/tex]

A property map is drawn at a scale of 1:1000

The distance between two points on the map is 4.9cm

Based on the given conditions, formulate :

= 4.9 * 1000/1

= 4.9 * 1000

Calculate the product or quotient,

= 4900

This alternative forms is,

= 4.9 * [tex]10^{3}[/tex]

Therefore,

The actual distance is = 4.9 * [tex]10^{3}[/tex], if the distance between two points on the map is 4.9cm.

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Answer:x=-13+1/5

Step-by-step explanation:

10x-18=15x+48

We move all terms to the left:

10x-18-(15x+48)=0

We get rid of parentheses

10x-15x-48-18=0

We add all the numbers together, and all the variables

-5x-66=0

We move all terms containing x to the left, all other terms to the right

-5x=66

x=66/-5

x=-13+1/5

Line A is perpendicular to D because a is parallel to c and c is perpendicular to d.

Parallel lines have the same slope since the slope is like a measure of steepness and since parallel lines are of the same steepness, thus, are of the same slope. Since the given parallel line has equation y = 2x + 2, thus its slope is 2 and thus, the slope of the needed line is 2 too.

WE have been given that a ll b,b ll c,c is perpendicular to d.

Here the line a is parallel to b and b is parallel to c so a must be parallel to c.

As we know that c is perpendicular to d since, a is parallel to c.

Therefore, Line A is perpendicular to D because a is parallel to c and c is perpendicular to d.

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Answer:

x = - 90

Step-by-step explanation:

1 = 0.4x - 0.8x - 35 ( add 35 to both sides )

36 = - 0.4x ( divide both sides by - 0.4 )

- 90 = x

The degree measure of one angle of a 30 sided regular polygon is 168°​

A two-dimensional geometric shape with a finite number of sides is called a polygon. A polygon's sides or edges are made up of segments of straight lines that are joined end to end to create a closed shape.

The intersection of two lines is referred to as a vertex or corner, and an angle is created as a result. Regular polygons are those that have sides that are congruent.

We will use the side-angle relation of a regular polygon with any no. of sides to find total sum of interior angles that is

(Side - 2) × 180°

(30 - 2) × 180°

= 5040°

Measure of each angle of 30-gon

= 5040°/30

= 168°​

Thus, the degree measure measure of One angle of a 30 sided regular polygon is 168°​

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Answer: 168

Step-by-step explanation: did the test

1) The value of x that would make m║n is; x = 13

2) The value of x that would make m║n is; x = 14

3)a) The angles are congruent by alternate interior angles postulate.

b) The angles are congruent by linear pairs postulate.

c) The angles are congruent by corresponding angles postulate.

When two parallel lines are intersected by a third one, the angles that occupy the same relative position at each intersection are known to be corresponding angles to each other.

1) From definition of corresponding angles, line m is parallel to line n and as such, we can say that;

2x + 12 = 38

2x = 38 - 12

2x = 26

x = 13

2) From definition of corresponding angles, line m is parallel to line n and as such, we can say that;

3x + 41 = 8x - 29

8x - 3x = 41 + 29

5x = 70

x = 14

3) a) From definition of alternate interior angles, we can say that yes the angles are congruent by alternate interior angles postulate.

b) Linear pair of angles are formed when two lines intersect each other at a single point. Thus, the angles are supplementary and add up to 180° and they are congruent by linear pairs postulate.

c) The angles are congruent by corresponding angles postulate.

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Answer:

[tex]621 = {3}^{3} \times 23[/tex]

Step-by-step explanation:

[tex]621 \div 3 = 207[/tex]

[tex]207 \div 3 = 69[/tex]

[tex]69 \div 3 = 23[/tex]

[tex]621 = 3 \times 3 \times 3 \times 23 = {3}^{3} \times 23[/tex]

Answer:

1cm:2km

Step-by-step explanation:

you ratio both of the answers which shows that 1cm on the map represents 2km in reality.

Lucy's gross pay per week is $393.75.

Lance's tax payment amount is $10983.

Lance's net pay is $41,317.

Lance's every paycheck of two will be around $2179 per month.

1) Lucy earns $15.75 per hour.

Last week she worked 25 hours.

Solution:

Lucy's gross pay per week is $15.75 * 25 hours.

Lucy's gross pay per week = 15.75 * 25  =  $393.75

2) Lance has a yearly salary of $52,300

He pays 21% as taxes.

Solution:

a) Lance tax pay amount = 21/100*52,300 = $10983

b) Lance's net pay =  $52,300 - $10983 =  $41,317

c) Per month salary = $52,300/12 =  $4358

Each paycheck will be 4358/2 = $2179

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The value of k so that the equation has two equal roots is 4

Quadratic equations are second-order polynomial equations and they have the form y = ax^2 + bx + c or y = a(x - h)^2 + k

The quadratic equation is given as

kx^2 - 4x + 1

A quadratic equation is represented as

ax^2 + bx + c

This means that

a = k, b = -4 and c = 1

When the equation has equal roots, we have

b^2 = 4ac

So, we have

(-4)^2 = 4 * k * 1

Evaluate

k = 4

Hence, the value of k is 4

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The average rate of change between the given points (3, 9) and (5, 15) is: 3.

To find the average rate of change between two points on a coordinate plane, the formula below is used:

Average rate of change = change of y over the change of x = (y2 - y1)/(x2 - x1).

Given the following points on a coordinate plane:

(3, 9)

(5, 15)

Let:

(3, 9) be represented as (x1, y1)

(5, 15) be represented as (x2, y2)

Substitute the values into the average rate of change formula:

Average rate of change = (15 - 9)/(5 - 3)

Average rate of change = 6/2

Average rate of change = 3

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Answer:

t = 10.09

Step-by-step explanation:

Answer in the picture below!