can someone help and explain how to do this. Ive been stuck in this lesson for days. This is so confusing and hard.

Answer:

0.5

Step-by-step explanation:

-1 + 3[(10-12)³÷(-16)]

Step 1: (10 - 12)³ — Bracket

(-2)³ = -8

Step 2: -8 ÷ (-16) — Division

-8/-16

= 1/2

Step 3: 3(1/2) — Multiplication

= 3/2

Step 4: 1 + 3/2 — Addition

= 0.5

You can also type it straight into the calculator to confirm.

Answer:

31.21

Step-by-step explanation:

Trigonal pyramidal is the NH3 molecule's molecular shape. The hydrogen atoms are attracted to the lone pair of electrons on the nitrogen atom, which causes the NH3 bond angle to be 107 degrees.

The process of merging two atomic orbitals to produce a new variety of hybridized orbitals is described as hybridization.

Usually, this mixing creates hybrid orbitals with entirely distinct energies, forms, and other characteristics.

Atomic orbitals with the same energy level are principally responsible for hybridization.

However, if the energies of the orbitals are equivalent, the process can involve both fully filled and partially filled orbitals.

We can better understand bond formation, bond energies, and bond lengths by using the hybridization concept, which is an extension of valence bond theory.

Hence, Trigonal pyramidal is the NH3 molecule's molecular shape. The hydrogen atoms are attracted to the lone pair of electrons on the nitrogen atom, which causes the NH3 bond angle to be 107 degrees.

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In the present question, we will calculate the area of each of the three regular figures that are parts of the irregular figure. They are:

A: a rectangle 4x3

B: a rectangle 9x3

C: a rectangle 3x5

The area of each rectangle is just the multiplication of the two sides, and the area of the irregular figure is the sum of them. From this, we calculate:

3/7 and 5/11 are fraction when converted in decimals resulted in repeating decimals.

Repeating decimals also known as recurring decimals means after decimals , a particular digit or sequence of digits keep repeating itself indefinitely . They are non terminating numbers means which don't have a end. Bars are used over that repeating digits .

Dividing the fractions :

A . 3/7 = 0.42857

It has different values after decimals

B. 1/9 = 0.111111

it has single value 1 which is repeating itself

C . 3/4 = 0.75

two different values after decimals

D. 5/11 =  0.4545454

after decimals 45 a sequence of number is repeating itself

3/7 and 5/11 are fraction which resulted into repeating decimals.

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For solving this problem we have to know the transformations between feeds and kilometers and seconds to hours:

Now we can make the transformation:

The slope of the given linear function is found as -3/4.

For the given question, the values for the x and y coordinates are given .

Consider two points;

(x1, y1) = (4, 6)

(x2, y2) = (8, 3)

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

Put the values.

m = (3 - 6)/(8 - 4)

m = -3/4

Thus, the slope of the given linear function is found as -3/4.

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The x-coordinates of the points of intersection of the given function graphs are;

1) x = 0 and x = 2

2) x = -1

3) x = 0

The point of intersection of a graph is defined as the point or coordinates where two lines or curves meet each other.

1) In the first graph, we are given the functions as;

f(x) = -³/₄x² + 3x + 1

g(x) = 2ˣ

Thus;

From the graph, f(x) = g(x) is at (2,4 and (0, 1)

2) In the first graph, we are given the functions as;

f(x) = x² + 4x + 2

g(x) = (¹/₂)ˣ + 1

Thus;

From the graph, f(x) = g(x) is at (-1. 3)

C) In the third graph, we are given the functions as;

f(x) = -⁷/₃x - 3

g(x) = 2ˣ - 4

Thus;

From the graph, f(x) = g(x) is at (0, -3)

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Answer:

plug the the x values in the chart into the formula one at a time and plug it into a calculator to get your y values.

example: y= -3/5(10)-3 —-> -9 y value

Step-by-step explanation:

As AD = DB, CD bisects ∠ACD

In Δ ACD and ΔBCD

We need to prove that  CD bisects ACB

∠A = ∠B

side AC = CB (as angle A and angle B are same)

CD is ⊥ AB

So, ∠ADC = ∠BDC

By SAS  Δ ACD and ΔBCD are congurent

In congurent triangles, corresponding angles and sides are equal

So, in  Δ ACD and ΔBCD

ACD = DCB

Therefore, as AD = DB, CD bisects ∠ACD

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The Alternate Exterior Angles Theorem states that, when two parallel lines are cut by a transversal , the resulting alternate exterior angles are congruent.

Given that:

Answer:

the difference is 1.8

Step-by-step explanation:

5-3.2=1.8

6.8-5=1.8

8.6-6.8=1.8

ect

Answer:

z = -3.2

Step-by-step explanation:

-1.25(z + 8) = -6

-1.25z - 10 = -6

           +10   +10

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

-1.25z = 4

÷(-1.25) ÷(-1.25)

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

z = -3.2

I hope this helps!

The equations of the lines that pass through the point (0,5) and intersect the circle at exactly one point are y = 4/3x + 5 and y = -4/3x + 5.

The equation of a circle centred at the origin with a radius of 3 units is defined by x² + y² = 3². The coordinates of the point are (0, 5). Let the equation of the tangent be y = mx + c.

y = mx + c

5 = m(0) + c

c = 5

The equation of the tangent is of the form mx -y + 5 = 0. The distance of the centre of the circle from the tangent must be equal to the radius of the circle.

d = |ax + by + c|/√(a² + b²)

3 = |m(0) + (-1)(0) + 5|/√[m² + (-1)²]

√[m² + (-1)²] = 5/3

m² + 1 = 25/9

m² = 16/9

m = ±4/3

The equations of the tangents are y = 4/3x + 5 and y = -4/3x + 5.

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The linear approximation of the function is given by a³ - 3a² +4 + 10ax

The given function is f(x)=x³+5x²+4

Let us find the linear approximation.

L(a) = f(a) + f'(a)(x-a)

let us differentiate the function

f'(x) = 2x²+10x

Let us find the value of the function at the exact point a

f'(a) = 2a²+10a

f(a) = a³+5a²+4

L(a) = f(a) + f'(a)(x-a)

L(a) = a³ + 5a² + 4 + 2a² + 10a (x-a)

L(a) = a³ + 7a² +4 + 10ax - 10a²

L(a) = a³ - 3a² +4 + 10ax

The use of a line to approximate the value of a function at a point is the definition of a linear approximation of either a function. When we see a curve (of a function) and a point on it, we immediately think of the tangent line concept.

If the equation of the tangent line is discovered at the supplied point, one can roughly calculate the value of something similar to the function at every location that is very close to the supplied point using the equation of the tangent line. This concept is also known as the tangent line approximation because the tangent line is utilized. Additionally called linear approximation.

Therefore the linear approximation of the function is given by

a³ - 3a² +4 + 10ax .

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Answer:

∠F = 29

Step-by-step explanation:

There is a property of angle of triangles.

Exterior angle = Sum of opposite interior angles

58 = x + x

58 = 2x

2x = 58

x = 58/2

x = 29

∠F = x = 29

10)

we get the points from the table are (2,12) and (8,0).

Consider the line equation.

where b is the y=intercept.

Substitute x=2 and y=12, we get

Substitute x=8 and y=0 in the line equation, we get

Substitute m value in this equation to find the value of b.

Dividing both sides by 3, we get

Hence the y-intercept is 16.

11)

we get the points from the table are (2,-5) and (4,17).

Consider the liner function.

where b is the y-intercept.

Substitute x=2 and y=-5, we get

Substitute x=4 and y=17 in the equation, we get

Substitute the value of m in this equation to find the value of b.

Hence the y-intercept is -27.

The interest rate will be 8%.

What is Simple interest?

A quick and easy method of calculating the interest charge on a loan is called a Simple interest.

Given that;

Principal amount = $6,000

Time = 5 years

Simple interest = $2,400

Now,

We know that;

⇒ Simple interest = PRT

Where, P is principal amount, R is interest rate and T is time.

Substitute all the values, we get;

⇒ Simple interest = PRT/100

⇒ 2400 = 6,000 x R x 5/100

⇒ 2400/30,000 = R/100

⇒ R = 0.08 x 100

⇒ R = 8%

Thus, The interest rate will be 8%.

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Given the expression

Next is to know how many 61 can go in 6409. Using the calculator, you can see that it is 105 with a remainder of 4

We will then have to express the fraction in the form:

Q is the quotient = 105

R is the remainder = 4

D is the divisor = 61

Substituting these values into the expression we will have:

Hence the solution written as a whole number and fraction is 105 4/61

To find how many picture are in the yearbook, multiply the number of pages of the yearbook by the number of pictures on one page. This is 32 times 8:

There are 256 picture in the yearbook.

ANSWER:

8

STEP-BY-STEP EXPLANATION:

They ask us for 1/3 of 24, what we must do multiply both values, just like that

Which means that 1/3 of 24 is 8

Answer:

0

Explanation:

Given the difference:

In front-end rounding, we consider the number with the largest place value.

In -36.673, the number with the largest place value is 3.

The digit after 3 us 6, so we round up as follows:

Likewise, In 39.999, the number with the largest place value is 3.

The digit after 3 us 9, so we round up as follows:

Therefore:

The diffrence is 0 using front-end rounding.

The mean mark of the girls is 86.

You must first add up all the numbers (3 + 11 + 4 + 6 + 8 + 9 + 6 = 47) before you can determine the mean. The amount is then divided by the number of scores utilized (47 / 7 = 6.7).

Given information:

The number of total students in the class is 30

Given number of boys in the class is 20

Then, the number of girls will be = 30-20

=10

The mean mark of the class = 70×30

= 2100

The guy's average grade is = 62.

Then, mark for the boys = 62×20

= 1240

The mark for the girls = 2100-1240

= 860

Then the mean mark of the girls will be  =860/10

= 86

Hence, the mean mark for the girls is 86

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Answer:x=44

Step-by-step explanation:

We want to know the cost for 7 rides and for 10 rides. We see that for each ride the price increases by $3.50. And thus the price for 7 rides will be:

And the price for 10 rides will be:

Now, for finding the equation we use that the state fair charges $8 for a general admission, and $3.50 for each ride. This can be written as:

where x represents the number of rides.

For example, if we want to know the cost for 18 rides, we replace the value of x by 18, and we get:

Then, the cost for 18 rides is $71.

Answer

Explanation

The distributive property tells us that:

Thus, we can apply this property to our given equation in the right side:

The given function is:

Differentiate w. r. t. z to get:

Hence the derivative is 9cot9z.

As given by the question

There are given that the numbers;

Now,

First make a table of numbers and their frequency.

So,

Now,

From the dot plot of the given numbers and their frequency.

So,

The dot plot of the given number is shown below:

The distance between two points of coordinates (x₁, y₁ ) and (x₂, y₂) is calculated using the formula:

Answer:

He cannot save $5 when he is buying something instead of making it himself.

Step-by-step explanation:

He makes $10 from lawn mowing and spends $5 on Taco Bell. He has $5 left.

If he made is lunch, He would have had $10 dollars.

Andrew's argument is flawed because he is not considering all of the costs and benefits associated with his decision to go to Taco Bell instead of preparing his own meal.

An argument is a collection of claims, the premises of which are provided in support of another statement, the conclusion.

There are a few problems with Andrew's argument.

First, he is assuming that the only cost of preparing his own meal is the price of the ingredients. However, there are also opportunity costs associated with preparing his own meal, such as the time he spends making it and the opportunity to do something else during that time (such as study for his exam).

Second, Andrew is assuming that he would have spent the same amount of money on ingredients as he did on his meal at Taco Bell. However, it is possible that the ingredients he would have used to make his own meal would have cost less than $5, in which case he would not have saved as much money as he thinks.

Finally, Andrew is assuming that he would have spent the same amount of time preparing his own meal as he did going to Taco Bell. However, it is possible that it would have taken him longer to prepare his own meal, in which case the opportunity cost of his time would have been even higher.

Overall, Andrew's argument is flawed because he does not evaluate all of the expenses and advantages of his decision to eat at Taco Bell instead of cooking his own dinner.

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