david drives from his home to the airport to catch a flight. he drives 3535miles in the first hour, but realizes that he will be 11hour late if he continues at this speed. he increases his speed by 1515miles per hour for the rest of the way to the airport and arrives 3030 minutes early. how many miles is the airport from his home?

Answer:

[tex]\frac{17}{4}[/tex]

Step-by-step explanation:

Replace y with 3/2 and solve for x

2x + 3(3/2) = 13

2x + 9/2 = 13  Subtract 9/2 from both sides

2x = [tex]\frac{13}{1}[/tex] - [tex]\frac{9}{2}[/tex]

2x = [tex]\frac{26}{2}[/tex] - [tex]\frac{9}{2}[/tex]

2x = [tex]\frac{17}{2}[/tex]  Divide both sides by 2

x = [tex]\frac{17}{2}[/tex] ÷ [tex]\frac{2}{1}[/tex]

x = [tex]\frac{17}{2}[/tex] x [tex]\frac{1}{2}[/tex]

x = [tex]\frac{17}{4}[/tex] o r4 [tex]\frac{1}{4}[/tex] or 4.25

The perimeter of the triangle is 46.4 and the length of a triangle's boundary taken as a whole is referred to as its perimeter.

Calculate the perimeter of a triangle:

Perimeter of a triangle = a +b + c

Therefore, the triangle's perimeter is 46.4, and the whole length of a triangle's boundary is referred to as the triangle's perimeter.

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The solutions to the quadratic equation using completing the square method are  x = -(√109)/2 - 5/2 and x = (√109)/2 -5/2.

Given the quadratic equation in the question;

To solve using  completing the square method, first add 21 to both sides

x² + 5x - 21 = 0

x² + 5x - 21 + 21 = 0 + 21

x² + 5x = 21

Next, create a trinomial square on the left side of the equation, determine the value that is equal to the square of half of b which is 5.

( b/2 )² = ( 5/2 )²

Now, add ( 5/2 )²  to both sides of the equation

x² + 5x + ( 5/2 )² = 21 + ( 5/2 )²

Simplify

x² + 5x + 25/4 = 21 + 25/4

Add 21 and 25/4

x² + 5x + 25/4 = 109/4

Factor the perfect trinomial.

x² + 5x + 25/4 = 109/4

( x + 5/2 )² = 109/4

Solve for x by taking the square root of both sides.

x + 5/2 = ±√( 109/4 )

x = -5/2 ±√( 109/4 )

x = ±(√109)/2 -5/2

x = -(√109)/2 - 5/2, (√109)/2 -5/2

Therefore, the solutions to are x = -(√109)/2 - 5/2 and x = (√109)/2 -5/2.

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The expression of  (√t)² ​is t.

A number can be squared, but it can also be divided into its square root. The value we get from multiplying a number by itself yields its square value, whereas the value we get from finding a number that, when squared, yields the original value of the number yields its square root value. In the event that 'a' is the square root of 'b,' then a a = b. Any number has two square roots, one with a positive value and the other with a negative value, because any number's square is always a positive number. As an illustration, the square root of 4 has the values 2 and -2. A number's power 1/2 value is represented by a number's square root. In other words.

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a. the distribution of X ~ N(15,5)

b.  the probability that it lasted at least 12 days = 0·72575

c.  the probability that it lasted between 17 and 22 days  = 0.30567

d. 72% of all of these types of trials are completed within  13 days

(a)

The x follow normal distribution with mean standard deviation

X ~ N(15,5)

(b)

probability at least 12 days.

P(X≥12) = 1 - P(X ≤12)

            = 1 - P((X - μ)/б ≤ (12-15)/5 ]]

            = 1 - P[Z  < -0.6]

            = 1 - 0·27425

            = 0·72575

(c)

Probability at least between 16 & 21 days

P(16 < x < 21) = p( (16-15)/5 <  (X - μ)/б - (21-15)/5]

                     = p (0.2 < Z < 1.2 )

                     = p[Z < 1.2] - P[Z < 0.2]

                     = 0.8849 - 0.5792

                     = 0.30567

(d)

standard normal table z is 0.65

p (Z < 0.65) = 0.74215

using Z score formula

X = Z x  б + μ

X = 0.65 x 5 + 15

X = 13

This branch of mathematics deals with the occurrence of a random event. The value's range is 0 to 1. Probability has been applied into mathematics to predict the likelihood of different events. Probability generally refers to the degree to which something is likely to occur. This fundamental theory of probability, which also applies to the probability distribution, can help you comprehend the possible outcomes for a random experiment. Before we can determine the probability that a certain event will occur, we must first know the total number of outcomes.

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To answer this question we need to remember that:

then:

now we need to remember that:

hence:

Therefore:

and the asnwer is A.

Answer:

nothing but B2. 0 hours

The bus will take 1.5 hours to cover 90 kilometers at an average speed of 60 km/hr.

Speed can be thought of as the rate at which an object covers distance.

i.e.

Speed = distance traveled/time taken

After arranging the equation we get,

Time taken = Distance traveled/Average speed

Here distance traveled by bus = 90 km

The average speed of the bus = 60 km/hr

So total time taken = 90/60 = 1.5 hours

So the bus will take 1.5 hours to cover 90 kilometers at an average speed of 60 km/hr.

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The equation to describe different possible combinations of roast beef and shrimp that he can buy for $96 is 4b + 10s = 96.

A mathematical equation is the statement that illustrates that the variables given. In this case, two or more components are taken into consideration to describe the scenario.

Let roast beef = b

Let shrimp = s

Total cost = 96

Therefore the equation will be:

(4 × b) + (10 × s) = 96

4b + 10s = 96

This illustrates the equation.

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The probability it fails to detect an underfilled can for the first time when it encounters the 10th underfilled is [tex]0.01667496[/tex].

What is probability?

Probability is defined as the possibility of an event to occur.

An automated weight monitor can detect underfilled cans of beverages with probability [tex]0.98[/tex]

Thus probability of success will be [tex]p=0.98[/tex]

So probability of failure [tex]q=1-p=1-0.98=0.02[/tex]

To find the first wrong detection happening on the tenth trial the first nine trials must be success followed by failure in the tenth trial.

Thus, required probability [tex]=p^9q^1=(0.98)^9(0.02)=0.01667496[/tex]

Hence the probability it fails to detect an underfilled can for the first time when it encounters the 10th underfilled is [tex]0.01667496[/tex].

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Answer:

It has reflectional symmetry with four lines of symmetry.

Step-by-step explanation:

======================================================

Explanation:

Choice A is false since it does have rotational symmetry. See choice B.

Choice B is close, but the "90 degrees" needs to be "45 degrees". Each 45 degree rotation of the figure has the "before" and "after" be the same.

Choice C is one of the answers. There's a vertical line of symmetry, and a horizontal one as well.  Then there are two diagonal lines of symmetry. Each goes through the center. A line of symmetry is a mirror line to allow us to reflect one half over this line to get the other half.

Choice D is another answer. It has point symmetry since we can pick any point on the figure and reflect it over the center point, to land on a corresponding image point on the opposite side of the figure. For example, the northern most point reflects over the center to land on the southern most point.

Scientific notation the

We can convert that 30% into a decimal, as: 0.3 (That's 30/100)

Now, we can multiply this 0.3 by any quantity that we want to calculate 30% from.

For example, let's take Justin's commission:

Adding this to his base salary,

We can conclude that Justin's paycheck for the week would be $1,117.5

Similarly, the expression for Justin's paycheck in a week were he made x dollars in sales is:

Answer:

1 answer

Step-by-step explanation:

when the terms are collected

[tex]4k = 0[/tex]

[tex]k = 0[/tex]

we get that:

so the answer is x=-6

The irrational number on a number line is 13.1. All real numbers that are not rational are considered irrational numbers. In other words, it is impossible to describe an irrational number as the ratio of two integers.

All real numbers that are not rational numbers are referred to be irrational numbers in mathematics. In other words, it is impossible to describe an irrational number as the ratio of two integers.There is no length, no matter how short, that could be used to express the lengths of both of the two supplied segments as integer multiples of itself.

Square Root of 172 to the nearest tenth, means to calculate the square root of 172 where the answer should only have one number after the decimal point.

We calculate the square root of 172 to be:

√172 = 13.11487704860400

Reduce the tail of the answer above to two numbers after the decimal point: 13.11

Round 13.11 so you only have one digit after the decimal point to get the answer: 13.1

To check that the answer is correct, use your calculator to confirm that 13.1² is about 172.

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Answer:

Use the information from parts a

Step-by-step explanation:

The correct option regarding the discounts is given as follows:

Store Z has the best sale price of $28.

The discount can be a percentage or an amount off, and the calculations are explained as follows:

Considering the discount plans and the original price of $35, the discounted prices in this problem are as follows:

Hence the correct statement is given as follows:

Store Z has the best sale price of $28.

The complete problem is:

Leo wants to buy some shoes. He found the shoes at three different stores for a price of $35. The stores are each having a sale:

Which statement about the sale price of these shoes is true?

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Triangle ABC and the triangle EFG are congruent by the first and third statement.

What is the congruent diagram?

Shapes that are identical to one another are said to be congruent. Both the matching sides and the corresponding angles match. We must examine all of the shapes' angles and sides in order to accomplish this. Two shapes that are similar to one another can be stacked perfectly.

In the given example triangle ABC and triangle EFG having one same side of length 2.

By the ASA (Angle side angle) criteria, we want two angles are same then the triangles are congruent.

When "m ∠ B and m ∠ F"  and "m ∠ A and m ∠ E" are same then the triangles are congruent.

Therefore, the first option is correct.

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Graph the cubic using its end behaviour and a few selected points.

The leading coefficient test requires one variable only

It will take 1.62 seconds for an acron to fall on the branch of 7 feet high.

For the given question,

An acorn fell from a branch 20 feet high.

An acorn landed on a branch 7 feet high.

The total distance travelled by and acron is 20 - 7 = 13 feet.

Let the final velocity of an acron is 'v'.

The initial velocity of an acron 'u' is zero.

Using third equation of straight line.

Put the values.

v² = 2×9.8×13

v = 15.96 ft/sec

Put the value in first equation of straight line.

v = u + gt

15.96 = 0 + 9.8×t

t = 15.96/9.8

t = 1.62 seconds.

Thus, it will take 1.62 seconds for an acron to fall on the branch of 7 feet high.

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multiply the numbers

Answer is 20y2

Answer:

%25 of customers ordered ice tea.

Step-by-step explanation:

To find percentage = Part/Whole x 100

35/140 x 100 = 0.25 x 100 = %25

The side of the square of each block = 2 feet

Given,

Shelly sews a square blanket that has an area of 144 square feet.

and,  it has 36 square blocks, each the same size.

To find the approximate length of each side of a block

Now, According to the question:

36 square blocks of same size. We need to find the area of each square block. so we divide = area / square blocks

= 144/ 36

= 4

The area of each square = 4 square feet

We know that

Area of square = side ^2

Side ^2 = 4

side = [tex]\sqrt{4}[/tex]

Side = 2

Hence, The side of the square of each block = 2 feet

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Graph 1 contains the two angles in the domain 0 ≤ θ ≤ 360º that have cosine given by cos(θ)  = -3/5.

The sine and the cosine of an angle are represented in the unit circle, in which:

Hence the cosine of the angle is negative when the x-axis is negative, which happens in these following quadrants:

The only equation that can be solved in the context of this problem is:

cos(θ)  = -3/5.

The solution is composed by two angles, one in the second quadrant and one in the third quadrant, hence Graph 1 shows the correct solution.

The exact angles are found applying the inverse cosine function as follows:

θ = arccos(-3/5) = 126.9º = 233.1º.

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EXPLANATION:

We are given the original price of a laptop computer at $1,700.

Now the price has been increased to $1,800.

Note that there is a $100 increase over the original price.

For us to calculate the percent increase we shall use the ratio of the increase over the original price and calculate as a percentage.

We can now set up the following equation;

We now cross multiply;

Rounded to one decimal place, the percent increase is;

ANSWER:

Answer:

option

Step-by-step explanation:

THE THIRD GRAPH(X)

Answer: 26.25%  basketball practice

Step-by-step explanation: At basketball practice I made 21 out of 80 shots.

Therefore the percentage of shots I made is = 21/80×100%

                                                                          =26.25%

Answer:

Explanation:

The slope-intercept form of the equation of a line can be written as;

where m = slope of the line

b = y-intercept of the line

So if Joanne graphed a linear function with a slope(m) of -4 passing through (0, -2), let's go ahead and determine the y-intercept of the line as shown below;

Therefore, the equation of line will be y = -4x - 2 as graphed below;

Given Nick's function as y = -2x - 4, combining both graphs, we'll have the below;

The red line is Joanne's line while the blue line is Nick's line.

We can see from the above graph of both lines that Joanne's line intersects the y-axis above Nick's line's

Solution

For this case we can use the following formula:

where:

P= 200

r= 0.09

n = 4

t= 4

And solving we got:

Given,

The statement is "The height of a person and his weight".

Required/

Identify the statement is inverse or direct variation.

As the height of the person increase then its their weight is also increased.

Similarly,

The height of the person decrease then its their weight is also decreased.

Hence, it is direct variation.