I need ur help please explain i don't understand check attachment

The Simplified expression for -(2x + y) -2(-x-y) is y.

Like terms in an algebraic expression is defined as those terms that have same variable and that variable has the same power .

Algebraic Operation is only possible with Like terms .

For Example ; 3x , 9x are like terms .

According to the given Algebraic expression

= -(2x + y) -2(-x-y)

= -2x-y+2x+2y

Combining like terms together

We get ,

= (-2x+2x)+(2y-y)

= 0+y

=y

Therefore , the Simplified expression for -(2x + y) -2(-x-y) is y.

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Answer: x=4

Step-by-step explanation:

Answer:

1. you can think that 289000= 17×17(=289)x100x100, so the result is √289x√100x√100=17 x 10x10=1700

2. 0.000004= 4x10^-6, so the Square root Is √4 x√10^-6= 2x 10^-3

Answer:

it will cost $32.9 for a 47 mile taxi ride

Step-by-step explanation:

Since 36 miles takes 42 minutes and Costa $25.20 then 47 miles taxi rides will take

42/36 = per minute = 1.17

1.17 × 47 = 54.83

In order to find cost per minute = $25.2/42 = 0.6

then 54.83 × 0.6 = $32.898

∴it will cost $32.9 for a 47 mile taxi ride

The answer is ∠1 = 113°

Linear Pair :

When two lines meet at a single point, a pair of linear angles is created. If the angles follow the point where the two lines cross, they are considered to be linear. A linear pair's angles add up to 180° in every case.

Now as per the question the given angle is

∠2 = 67°

It is also given that ∠1 and ∠2 form a linear pair. Therefore it means that the sum of both the angles will be 180°

∠1 + 67° = 180°

Now subtracting 67 from both sides we will get :

∠1 = 180 - 67 = 113°

Therefore, ∠1 = 113°

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Answer:

rational

Step-by-step explanation:

the square root of 196 is 14 (  whole number) therefor it is rational

There is need of total of 9 levels to stack 285 boxes.

A sequence can be taken as the set of numbers having a particular order for all the terms or we can say that arrangement of numbers in some order is known as sequence.

Some examples for sequence are :

2,4,6,8,10,12

3,9,27,81,243

The recursive sequence is the sequence in which any term in the sequence can be find with the help of previous term of that sequence.

In a sequence , first term always known as initial term.

and difference between two terms are known as common difference. It is denoted by d.

General form of sequence is :

[tex]a_1,a_2,a_3,----,a_n[/tex]

where , [tex]a_n[/tex] = last term in sequence.

According to question,

Also, number of boxes at level recursively n =[tex]a_{n-1} + n^2[/tex]

The formula to find number of level for 285 boxes is :

[tex]a_n > =285[/tex]

now, find each level

[tex]a_1 = 1 , a_2 = 1 + 2^2 = 5 , a_3 = 5+3^2 = 14,\\a_4 = 14 + 4^2 = 30\\a_5 = 30 + 5^2 = 55\\a_6 = 55 + 6^2 = 91\\a_7 = 91 + 7^2 = 140\\a_8 = 140 + 8^2 = 204\\a_9 = 204 +9^2 = 285[/tex]

thus, to stack 285 boxes total numbers of level are 9.

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The complete question is :

Suppose you're stacking boxes in levels which make squares. The numbers of boxes in each successive levels make a sequence. The figure show top four levels as view from top or above.

a. How many boxes of same size would need for next lower level?

b. How many boxes of same size would need to add the 3 levels?

c. Suppose you are stacking 285 boxes. Then, how many total levels will you have?

Answer:

d=10

d=2r=2·5=10

We're given:

We can start by isolating one of the variables, like y:

[tex]3x-y=-6\\-y=-3x-6\\y=3x+6[/tex]

Now we can find four solutions by plugging in any number for x:

[tex]y=3x+6\\y=3(1)+6\\y=3+6\\y=9[/tex]

First solution: (1,9)

[tex]y=3x+6\\y=3(2)+6\\y=6+6\\y=12[/tex]

Second solution: (2,12)

[tex]y=3x+6\\y=3(3)+6\\y=9+6\\y=15[/tex]

Third solution: (3,15)

[tex]y=3x+6\\y=3(4)+6\\y=12+6\\y=18[/tex]

Fourth solution: (4,18)

First solution: (1,9)

Second solution: (2,12)

Third solution: (3,15)

Fourth solution: (4,18)

By using angle sum property, The value of ∠ A = 40° and ∠ C = 90°

A triangle's total angle is 180°.

Using angle sum property,

∠A+∠B+∠C = 180°

assuming B = 50°

replacing in the formula

∠A+50+∠C = 180°

Due to the triangle's right angle, A+90=180-50

∠A = 130° - 90

∠ A = 40°

The angles A and C must be more than 90 degrees since the ABC is a right triangle.

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In triangle ABC, the measure of angle B is 50 degrees. Select all possible values for the measures of A and C if ABC is an right triangle. m\angle∠A= 58 degrees; m\angle∠C= 72 degrees m\angle∠A= 100 degrees; m\angle∠C= 30 degrees m\angle∠A= 80 degrees; m\angle∠C= 50 degrees m\angle∠A= 60 degrees; m\angle∠C= 70 degrees m\angle∠A= 90 degrees; m\angle∠C= 40 degrees m\angle∠A= 105 degrees; m\angle∠C= 25 degrees

Answer:

m∠A = 40°, m∠B = 75°, m∠C = 65° (A)

m∠A = 136°, m∠B = 28°, m∠C = 16° (B)

m∠A = 60°, m∠B = 60°, m∠C = 60° (E)

Step-by-step explanation:

i did the assignment and got it wrong at first then it showed me the right answers

The standard deviation decreases as the sample size increases.

The degree of data dispersion from the mean is measured by the standard deviation. Data are grouped around the mean when the standard deviation is low, and are more dispersed when the standard deviation is high.

A region containing 68 percent of the total number of data points would be defined by one standard deviation, or one sigma, shown above or below the average value on that normal distribution curve. Ninety-five percent of the data would be covered by two sigmas above or below, whereas three sigmas would cover 99.7 percent.

The standard deviation is significant because it reveals the degree of dispersion of the values in a particular dataset. Every time we examine a dataset, we look for the following metrics: the dataset's geographic center.

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Answer:

1 15 degrees

Step-by-step explanation:

Exterior angle is equal to sum of opposite interior angles

EN is a radius and the diameter is twice the radius. The diameter of the circle is 26 ft.

In geometry, a circle's diameter is any straight line segment that passes through the center of the circle and has endpoints on the circle. It is also referred to as the circle's longest chord. Both definitions apply to a sphere's diameter.

The diameter is twice the radius because the greatest distance between two points on a circle must be a line segment through the center of the circle.

Here, CF is a radius and the diameter is twice the radius.

Diameter of a circle = 2r

d = 2r

Where, r = 13

Diameter of a circle, d = 2r

Diameter of a circle = 2(13)

Diameter of a circle = 26

Therefore, the diameter of the circle is 26 ft.

Here, EN is a radius and the diameter is twice the radius.

Therefore, the diameter is 26 ft.

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Kristen will do both the exercises together, 6 days from now.

We are told that Kristen goes hiking every 3 days and swimming every 2 days.

The day she will do both the exercises together will be the day which is a multiple of the LCM of 2 and 3.

Now, since 2 and 3 are both prime numbers, their LCM (lowest common multiple) will simply be their product, which comes out to be-

LCM (2, 3) = 2 * 3

= 6

Thus, Kristen will do both the exercises on every 6th day.

Thus, if she went for both swimming and hiking today, she will do both the exercises together again 6 days from now.

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The correct option that proves that angles 1 and 2 are supplementary is; B: Angles 1 and 4 form a Linear Pair and angles 4 and 8 are congruent as corresponding angles.

Supplementary angles are two angles whose measures add up to 180° . The two angles of a linear pair are always supplementary.

Now, looking at the given image, we can see a total of 8 angles formed from the transverse lines.

Angles 1 and 4 can be classified as Linear Pairs because Linear pair of angles are formed when two lines intersect each other at a single point.

Similarly, angle 4 and angle 8 are classified as corresponding angles because Corresponding angles are the angles that are formed when two parallel lines are intersected by the transversal

Thus, the correct option that proves that angles 1 and 2 are supplementary is; B: Angles 1 and 4 form a Linear Pair and angles 4 and 8 are congruent as corresponding angles.

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The systems of equations which Tamara can use to find the dimensions of a rectangle that uses all the ribbons is;

If follows from the task content that the systems of equations which best models the situation and can be used to find the dimensions is required.

Hence, since the perimeter of a rectangle is; P = 2l +2w.

Also, the length of the rectangle is 3 inches greater than its width, we have;

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The standard equation for the given slope is x + y = 0.

These are two methods for finding the equation of a line given a point and slope. Create the equation y = mx + b using the m given in the problem and the b you just solved. Point-slope form = y-y1 = m (x-x1), where (x1, y1) is the specified point and m is the specified slope. "x" and "y" remain as variables.

y = 3 and x = -3 and m = - 1

To find b, we will plug in the known parameters listed above.

3 = −1(-3) +b

To solve for b, move 3 to the other side of the equation.

3=3+b

b=0

Standard form equation:

y = -x + 0

x + y = 0

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Answer:

1/5 as a fraction can be turned into 20/100. (Multiply the top and bottom by 20). 20/100 can be turned into 0.2.
0.2 multiplied by something will end up as 20% of the original value. So 0.2 and 20% are the same.

Therefore, they are all equal.

Step-by-step explanation:

1/5 as a fraction can be turned into 20/100. (Multiply the top and bottom by 20). 20/100 can be turned into 0.2.
0.2 multiplied by something will end up as 20% of the original value. So 0.2 and 20% are the same.

Therefore, they are all equal.

The value of A is 3 square unit

A square number is a number multiplied by itself. This can also be called 'a number squared'. The symbol for squared is ².

Formula: s²= s x s

given that, the question is testing the concept of substitution.

A=12s^2

If s=1/2,

Substituting s with 1/2 we get;

A=12(1/2)^2

=12×1/4

=3

The answer is 3 unit squared. There is no fraction in the answer.  

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Answer:

A has a value of 3 square units.

Step-by-step explanation:

Any number multiplied by itself is a square number. This is also referred to as "a number squared." 2 represents the squared sign.

Equation: s2=s x s

As a result, the question is putting the idea of substitution to the test.

A=12s^2

If s=1/2,

Substituting s with 1/2 we get;

A=12(1/2)^2

=12×1/4

=3

The answer is 3 unit squared. There is no fraction in the answer.  

Using exponent properties we can get two equivalent expressions:

⁸√d^5

d^(5/8)

Here we need to use two properties, these are:

ⁿ√x = x^(1/n)

(x^n)^m = x^(n*m)

Now, if we use the first property, we can rewrite the expression as:

(d^1/8)^5 = ⁸√d^5

Which is an equivalent expression.

If we use the other property we can get:

(d^1/8)^5 = d^( (1/8)*5) = d^(5/8)

Which is another equivalent expression.

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If two angles are supplementary, then one of the angles is obtuse: Never TRUE

Therefore, the statement "if two angles are supplementary, then one of the angles is obtuse" is never TRUE.

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The recursive formula is a(n) = a(n-1) + 3 while the explicit formula is a(n) =  3n - 6.

In an arithmetic sequence, the following applies:

a(n) = a(n-1) + d  (This is the recursive formula)

a(n) = a(1) + (n-1) . d  ( This is the explicit formula)

Where:

a(n) = nth term

a(n-1) = (n-1)th term

d = common difference

a(1) = the first term

The given sequence is:

    -3, 0, 3, 6, ....

The common difference (d)  = 0 - (-3) = 3

Hence, the recursive formula is:

a(n) = a(n-1) + 3

Note that  a(1) = -3. Hence, the explicit formula is:

a(n) = a(1) + (n-1) . d

a(n) = -3 + (n-1) . 3

a(n) = -3 + 3n - 3

a(n) =  3n - 6

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Answer:

Step-by-step explanation:

38 + (-17) =  21

Answer:

The answer would be 55

Step-by-step explanation:

38-(-17)

38+ +17

55

Step-by-step explanation:

100x4=400miles

400miles in February

OR

300x4=1200 miles

1200 miles in February

I don't know what is the correct one tho

Answer:

Step-by-step explanation:

1200 miles

Answer:

x = 12

Equation: 6x + 8 = 80

Step-by-step explanation:

A triangle's angles add up to 180 degrees.  Knowing this, the angle represented by the "6x + 8" must equal 80 degrees since the other two angles add to 100 degrees.

A recursive definition of the given Geometric progression is: [tex]a_{n}=a_{n-1}r[/tex], with a₁ = 2 and n > 1.

A geometric progression, sometimes referred to as a geometric sequence in mathematics, is a series of non-zero numbers where each term following the first is obtained by multiplying the preceding one by a constant, non-zero value known as the common ratio.

Now,

Given: 2, -4, 8, -16, ...

Here, [tex]r = \frac{-4}{2} = -2[/tex] and a₁ = 2.

Thus, a recursive formula for this geometric progression can be: [tex]a_{n}=a_{n-1}r[/tex], with a₁ = 2 and n > 1.

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Answer:

Here is your answer

Step-by-step explanation:

113/8= 14 and 1/8th

Answer:

Step-by-step explanation:

285 dollars.  the left money = 660 - 375 =285

The probability that Alice, David, and Carlene are selected is 1/120.

Probability is a branch of mathematics that deals with numerical descriptions of how likely an event is to occur or how likely a proposition is to be true. The probability of an event is a number between 0 and 1, where 0 indicates the event's impossibility and 1 indicates certainty.

3 people can be chosen from 10 people in 10C3 ways and Alice, David, and Carlene can be chosen in only one way.

10C3 = 10! / (10 - 3)! 3!

= (10 [tex]*[/tex] 9 [tex]*[/tex] 8 [tex]*[/tex] 7!) / (7! [tex]*[/tex] 3 [tex]*[/tex] 2 [tex]*[/tex] 1)

= 120

So, the number of possible outcomes is 120 and the number of favorable outcomes is 1. Therefore, the probability is 1/120.

The probability that Alice, David, and Carlene are selected is 1/120.

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