you and a friend are riding your bikes to a restaurant that you think is east; your friend thinks the restaurant is north. you both leave from the same point, with you riding 16 mph east and your friend riding 8 mph north. after you have travelled 3 mi, at what rate is the distance between you and your friend changing?

Answer:

3X-9=(6x6)/4

Step-by-step explanation:

Answer:

90%

Step-by-step explanation:

Do 18 divided by 20 you get 0.9 which equals 90% since the 9 is in the tens place.

Answer:

48 and 15/16

Step-by-step explanation:

49+1/8(-1/2)

49+(-1/16)

48 and 15/16

The required value of the expression is 3 when substituting the value of -1/2 for y.

Algebraic expressions are mathematical statements with a minimum of two terms containing variables or numbers.

The expression is given in the question as:

49 + 1/8y

To evaluate the expression, we need to substitute the value of -1/2 for y. Doing this gives us:

⇒ 49 + 1/8(-1/2)

⇒ 49 + (-1/16)

Simplifying the expression further gives us:

⇒ 49 - 1/16

⇒ (16 × 3 + 1 - 1)/16

⇒ 48/16

Apply the division operation, and we get

⇒ 3

Therefore, the final value of the expression is 3.

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Answer:

32, 16, 8, 4, 2, 1

Step-by-step explanation:

32, 16, 8, 4, 2, 1

Rule: Divide by 2 the previous number

Answer: The original price is 200$

Step-by-step explanation:

original price = 100 percent

100-64=36

36% =72

100%= x

use cross multiply

36x=100*72

36x=7200

x=200

The original price is 200$

Answer:$200

Step-by-step explanation:

$72 is 100-64 or 36% if the original price.

First, we convert the percentage into a decimal number.

So, 0.36.
Next we divide that by $72

The answer is $200

The system of equations for the given situation are 14=b-c ; 35=b+c and the speed of boat is 24.5 miles/hr and speed of current is 10.5 miles/hr.

Given,

Distance covered by boat in upstream in 3 hours = 42 miles

Distance covered by boat in downstream in 2 hours = 70 miles.

Let

speed of boat in still water be 'b'

speed of current of stream be 'c'

we know that distance=speed x time

If the boat is moving upstream, the current (which is 'c' miles per hour) will push against it, reducing the boat's speed by 'c' miles per hour. The boat's resulting speed (as it travels upstream) is 'b-c' miles per hour. If, on the other hand, the boat is travelling downstream, the current will push it faster, increasing the boat's speed by 'c' miles per hour. The boat's downstream speed is 'b+c' miles per hour as a result.

Then the system of equations will be

distance while going upstream ,

distance=speed x time

42=(b-c)(3)

14=b-c....i

distance while going downstream,

70=(b+c)(2)

35=b+c....ii

solving eq. i and eq. ii

14=b-c

35=b+c

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

49=2b

b=24.5

Substitute in eq. i,

14=24.5-c

c=24.5-14

c=10.5

Thus, the boat's speed is 24.5 miles per hour and the current's speed is 10.5 miles per hour.

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The width, length and height of the box is 12.247 inch, 24.494 inch, 73.482 inch respectively.

We have given that Alina wants to make a rectangular box whose base is twice as long as it's wide and alina has 300 square inches of velvet.

i.e A = l × w

it s given that l = 2w

∴ A = 2w²

⇒ 300 = 2w²

      w² = 150

       w = 12.247 inch

i.e. l = 2w

     l = 2(12.247)

     l = 24.494 inch

Therefore length of the box is 24.494 inch and width is 12.247 inch.

Now we have to find height of the box.

For the height of rectangle we know the formula

i,e, Height = [tex]\frac{P}{2}[/tex] - w

where P is perimeter

we will first find perimeter of rectangle.

Therefore P = 2(l + w)

                 P = 2(24.494 + 12.247)

                 P = 2(36.741)

                 P = 73.482 inch

Hence the height of the rectangle is 73.482 inch.

Therefore the Eliza's box that Alina make has width 12.247 inch, length 24.494 inch and height 73.482 inch.

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3 colors are the maximum that can be used.

What is square?

Having four equal sides, a square is a quadrilateral. There are numerous square-shaped objects in our immediate environment. Each square form may be recognized by its equal sides and 90° inner angles. A square is a closed form with four equal sides and interior angles that are both 90 degrees. Numerous different qualities can be found in a square.

each square of the three-by-three grid is painted so that the whole picture has at least the two lines of symmetry indicated.

each grid square is painted one solid color

Based on the symmetry lines the groups that must be the same color are

{1,3,7,9}

{2,4,6,8}

and {5}

Hence, 3 colors are the maximum that can be used.

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Answer:

In order to prove that (x+3) is a factor of p(x), Serena must show that p(-3) = 0. This means that if we plug -3 into the polynomial p(x), the resulting value must be 0. Therefore, the correct answer is option D, p(-3)=0.

Step-by-step explanation:

Step-by-step:

2 | 3x + 1 | -4 = 6

2 | 3x + 1 | = 10

| 3x + 1 | = 5

| 3x + 1 | = ±5

Solve for both: 3x + 1 = -5 AND 3x + 1 = 5

3x + 1 = - 5

3x = - 6

x = -2

3x + 1 = 5

3x = 4

x = 4/3

x = -2, 4/3

Answer:

3

Step-by-step explanation

True, Every normal unitary operator u: x! x exists.
False, An if only if it is invertible, a matrix qualifies as unitary.

What is the matrix?

A group of numbers built up in a rectangular array with rows and columns. The elements, or entries, of the matrix, are the integers. In addition to numerous mathematical disciplines, matrices find extensive use in the fields of engineering, physics, economics, and statistics.

Here, we have

a. Every unitary operator U:X→X is normal as an operator A is unitary if A*A = AA* = I and an operator is normal if A*A = AA*.

Hence, every unitary operator u: x → x is normal.

b. A unitary matrix is always invertible but an invertible matrix need not be unitary. An invertible matrix A is unitary if A⁻¹ = A*

Hence, it is not true.

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B. Due to the fact that ABCD has at least two parallel sides in one pair.

The y-coordinates of the two points A(-3, 1) and D(5, 1) are identical.

Then

The x-axis and the line AD are parallel.

As opposed to that,

The y-coordinates of the two points B(1,5) and C(5,5) are identical.

Then

The x-axis and the line BC are perpendiculars.

We discover:

• AD lies along the x-axis.

BC is perpendicular to the x-axis.

Therefore

AD / BC

Conclusion:

Due to the fact that ABCD contains at least two parallel sides in one pair.

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Answer:

Step-by-step explanation:

10% of $520 is $52, so that's what Oliver usually saves each week.

This week he earned 10% more, which is $52. $520 + $52 = $572

10% of $572 is $57.20

His pay minus his living expenses is $572 - 57.20

He has $514.80 to spend

Since 10% of $520 is $52 and that's what he usually saves, it looks like he just went with that instead of adding the $52 to the $520 and then deducting 10%

Answer:

Step-by-step explanation:

i think it is 74

[tex]11.5x+10.9y[/tex] when x is 6 and y is 7

Substitute:

[tex]11.5(x)+10.9(y)[/tex]

[tex]11.5(6)+10.9(7)[/tex]

Solve:

[tex]11.5\times6=69\\10.9\times7=76.3[/tex]

[tex]69+76.3[/tex]

[tex]=\fbox{145.3}[/tex]

There are 12 even integers are there between 200 and 700 whose digits are all different and come from the set (1, 2, 5, 7, 8, 9}.

What is number of permutation?

Take the number of possibilities for each event and multiply it by itself X times, where X is the total number of events in the sequence, to determine the number of permutations.

For instance, four-digit PINs have 10 possible combinations because each digit can range from 0 to 9.

We see that the last digit of the 3 -digit number must be even to have an even number. Therefore, the last digit must either be 2 or 8.

Case 1 - the last digit is 2. We must have the hundreds digit to be 5 and the tens digit to be any 1 of {1,7,8,9}, thus obtaining 4 numbers total.

Case 2 - the last digit is 8. We now can have 2 or 5 to be the hundreds digit, and any choice still gives us 4 choices for the tens digit. Therefore, we have 2 x 4 = 8 numbers.

Adding up our cases, we have 4 + 8 = 12 numbers.

Hence, there are 12 even integers are there between 200 and 700 whose digits are all different and come from the set (1, 2, 5, 7, 8, 9}.

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Complete question:

how many even integers are there between 200 and 700 whose digits are all different and come from the set (1, 2, 5, 7, 8, 9}.

The total cost and the number of minutes of the plan will be $70 and 300 minutes, respectively.

A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.

The linear equation is given as,

y = mx + c

Where m is the slope of the line and c is the y-intercept of the line.

A telephone organization offers two month-to-month designs. Plan An expense of $16 in addition to an extra $0.18 for every moment of the call. Plan B costs $28 in addition to an extra $0.14 for every moment of the call.

Let 'y' be the total amount and 'x' be the number of minutes. Then we have

y = 0.18x + 16         ...1

y = 0.14x + 28        ...2

From equations 1 and 2, then we have

0.18x + 16 = 0.14x + 28

0.18x - 0.14x = 28 - 16

0.04x = 12

x = 12 / 0.04

x = 300

Then the value of the variable 'y' will be given as,

y = 0.18(300) + 16

y = 54 + 16

y = $70

The total cost and the number of minutes of the plan will be $70 and 300 minutes, respectively.

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The equation of a line that passes through [tex](-1,3)[/tex] and has a slope [tex]2[/tex] is [tex]y=2x+5[/tex]

The equation of the line passes through the point is [tex](-1,3)[/tex]

One point and the slope are given, we will use one point form i.e.

[tex]y=mx+c.....(1)[/tex]

The point [tex](-1,3)[/tex] satisfies the equation and the slope is [tex]2[/tex]

Plug in these values in (1)

[tex]3=2(-1)+c\\3=-2+c\\c=3+2\\c=5[/tex]

Plug in the value of slope and c is

The equation becomes [tex]y=2x+5[/tex]

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A car is selected from random sample of 100 cars,

a) The events for which the selected car has 2 doors and 4 doors are mutually exclusive event ;

i.e P(A ∩ B) = 0.

b) The probability that a randomly selected car from this sample had 2 doors or 4 doors is 0.77..

Mutually exclusive event :

A and B are mutually exclusive if they cannot occur at the same time. This means that A and B have no common result and P(A and B) = 0.

We have given a Venn diagram which consists the cars have sunroof , 2 doors and 4 doors.

Firstly we need to understand the Venn diagram properly for determining the required probability values.

From Venn diagram ,

Total number of cars in sample = 100

Cars with sunroof only = 13

Number of cars with 2 doors only = 14

Number of cars with 4 doors only = 25

Number of cars with sunroof and 2 doors = 18

Number of cars with sunroof and 4 doors = 20

a) let us consider two events A and B

A : car with two doors

B : car with four doors

As we see in Venn diagram,

the number of cars with 4 doors and 2 door, n(A∩B) = 0 => P(A and B) = 0

so, by definition of mutually exclusive event

A and B are are mutually exclusive events.

b) Probability that car with 2 doors, P(A)

= favourable outcomes for A / total outcomes

= 14+18/100 = 32/100

Probability that car with 4 doors, P(B)

= favourable cases for B/ total outcomes

= 25+20/100 = 45/100

Probability that randomly selected car from this sample had 2 doors or 4 doors = P( A or B)

= P(A) + P(B) = 77/100 = 0.77

Hence, the required probability is 0.77..

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Complete question:

Two-way tables, Venn diagrams, and probability Sunroof 13 10 18 20 14 25 2 doors 4 doors In this sample, are the events "2 doors" and "4 doors" mutually exclusive? Choose 1 answer A Yes O No Find the probability that a randomly selected car from this sample had 2 doors or 4 doors. O of 4

Answer:

37

Step-by-step explanation:

50*26%

50-(50*26%)

The triangle's vertices will therefore be A'(4, 6), B'(0, 0), and C'(-2,4) if it is mirrored across the y-axis and then dilated by a scale factor of 2.

The ratio of the scale of an original thing to a new object that is a representation of it but of a different size is known as a scale factor (bigger or smaller). For instance, we can increase the size of a rectangle with sides of 2 cm and 4 cm by multiplying each side by, let's say, 2.

Given

In line with the posed question.

Triangle ABC's vertices are A(-2, 3), B(0, 0), and C. (1, 2).

As we are aware,

The x-coordinates of each point must be negative while keeping the y-value constant in order to reflect a triangle over the y axis.

As a result, when triangle ABC is mirrored across the y-axis, its vertices are

A'(2,3)

B'(0, 0)

C'(-1, 2)

The vertices of the triangle will also change when it is dialated by a scale factor of 2.

A'(4, 6)

B'(0, 0)

And, C'(-2, 4)

The triangle's vertices will therefore be A'(4, 6), B'(0, 0), and C'(-2,4) if it is mirrored across the y-axis and then dilated by a scale factor of 2.

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Yes, there is a correlation between these measures. The higher the placement exam score, the higher the student's score on their first exam tends to be. For example, students with placement exam scores of 11 and 49 had first exam scores of 27 and 71 respectively, indicating that the higher the placement exam score, the higher the first exam score.

A measure in mathematics is a generalization of the ideas of length, area, and volume. Measures are sometimes referred to as "mass distributions" informally. A measure, in more exact terms, is a function that gives numbers to particular subsets of a given set. This quantity is described as the set's measure.

To measure length or distance, this system employs inches, feet, yards, and miles. Volume or capacity are expressed in fluid ounces, cups, pints, quarts, or gallons. In ounces, pounds, and tons, weight or mass is expressed.

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The sample size should be 24.

What is the sample size?

The process of deciding how many observations or replicates to include in a statistical sample is known as sample size determination. Any empirical study with the aim of drawing conclusions about a population from a sample must take into account the sample size as a crucial component.

Here, we have

Given

Margin of error = 300

confidence level = 0.9

standard deviation = 900

Assuming the standard deviation to be of population

ME = Z(0.1/2) × σ/√n

300 = 1.645 × 900/√n

n =  {(1.645 × 900)300}²

n = 24

Hence, the sample size should be 24.

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The measure of this angle is 172°.

Circumference: Any shape's circumference establishes the path or boundary that encircles it. To put it another way, the circumference and perimeter both refer to the length of a shape's outline.

When two of its rays pass through the endpoints of an arc, line segment, or other section of a curve, the angle is subtended by that arc, line segment, or other section of the curve.

From the information provided.

The circle's 1/360th circumference measures 0.5 cm in length.

Total circumference of circle now will be

360*0.5cm

= 180cm

However, if a 360° angle is equivalent to a circumference of 180 cm;

Then, an angle that subtends with 86 cm long will be:

=(86/180)*360

=172°.

Therefore, the measure of this angle is 172°

Given Question is incomplete complete question here

A circle is centered at the vertex of an angle, and the angle's rays subtend an arc that is 86 cm long. 1/360th of the circumference of the circle is 0.5 cm long. What is the measure of this angle in degrees?

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Answer:

-30

Step-by-step explanation:

Your welcome.

The general convention is to reject a hypothesis if your data analysis indicates that there is a probability that a hypothesis is incorrect. This is False.

Probability is the occurence of likely events. It is the area of mathematics that deals with numerical estimates of the likelihood that an event will occur or that a statement is true. An event's probability is a number between 0 and 1.

After a performing a test, scientists can reject the null hypothesis meaning there is a definite, consequential relationship between the two phenomena

In this case, the convention is to accept a hypothesis if your data analysis indicates that there is a probability that a hypothesis is incorrect.

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After dilation, the shape of the image and preimage will be same, but the size will be different

The dilation is the one form of transformation, that will change the size of the original figure, but the shape of the figure remains same

Consider a triangle and dilating the triangle by a scale factor of 3

The scale factor 3 means the size of the original image will enlarge by three times of the original size .

Still the shape of the triangle will be same, but the size of the triangle changed according to the dilation

Therefore, size of the image will change, but the shape will not change

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The value of c for the angle of the triangle will be 7.34.

Congruence and likeness tests in geometry require comparing matching sides and angles of polygons. Each side and angle in one polygon is paired with a side or angle in the second polygon in these tests.

Given that in triangle LMN, m∠L = (6c + 35)°. If the exterior angle to ∠L measures 79°,

The value of angle c will be calculated as,

(6c + 35)° = 79°

Apply the mathematical operations and solve further,

6c = 79 - 35

6c = 44

c = 7.34

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The answer will be (9)

Step-by-step explanation:

The first step to dividing fractions of 18 divide 2 than (reverse the numerator and denominator) of the second fraction. Next, multiply the two numerators.

If Sergio read 18 pages of novel in 2 hours, than he's only reading 9 pages at a time than the next!