Physical science
If a car travels 625 meters 15 seconds, how fast is it going?

Answer:

x = 6

Step-by-step explanation:

x² - y² is a difference of squares and factors as (x + y)(x - y)

given

x² - y² = 20 , then

(x + y)(x - y) = 20 ← substitute x + y = 10

10(x - y) = 20 ( divide both sides by 10 )

x - y = 2 → (1)

x + y = 10 → (2)

add (1) and (2) term by term to eliminate y

2x + 0 = 12

2x = 12 ( divide both sides by 2 )

x = 6

The average of the last three numbers is 58 if the average of the five numbers in a list is 54. the average of the first two numbers is 48.

It is defined as the single number that represents the mean value for the given set of data or the closed value for each entry given in the set of data.

It is given that:

The average of the five numbers in a list is 54. and the average of the first two numbers is 48.

54 = sum of the five numbers/5

54x5 = sum of the five numbers

270 = sum of the five numbers

48 = sum of the two numbers/2

48x2 = sum of the two numbers

96 = sum of the two numbers

Sum of three numbers = 270 - 96

Sum of three numbers = 174

The average of the last three numbers = 174/3 = 58

Thus, the average of the last three numbers is 58 if the average of the five numbers in a list is 54. the average of the first two numbers is 48.

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Kepler had 9 wooden edges to make for the cube.

As it is given in the data that the platonic solids are related to the orbits of the planets, and he made models of each of the Platonic solids. Kepler made a frame of each of the platonic solids by fashioning together wooden edges. At that time six planets were discovered and out of the six, two platonic solids were considered as cube. A cube is a three dimentional structure which has 8 corners and 12 edges.

So the number of edges = 4 x 2 + 1

= 9

Kepler has 9 wooden edges to make for the cube, to make a frame of each of the platonic solids by fashioning together wooden edges.

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Answer:

Parallelogram S: b = 7, h = 6

Parallelogram T: b = 3, h = 6

Area of Parallelogram S = 42

Area of Parallelogram T = 18

Step-by-step explanation:

The bases and heights of each parallelogram are given by the arrows, just count the number of boxes you see.

Area = base × height, so you just multiply these numbers. Area of parallelograms is found the same way as area for squares/rectangles.

7 × 6 = 42 and 3 × 6 = 18

Answer:

A= Q/d +N

Step-by-step explanation:

First you want to move the d term over by dividing both sides

Next you can move the N over by adding it to both sides.

Step-by-step explanation:

adventures

Q

d and d will cancel and

it let d= A-N

Q

Using elimination method, the solution of the given system of equations is (-4/7, 1/14)

A system of equation can be solved using:

The given system of equations:

2 = 4y - 3x   ............   (1)

5x = 2y - 3  .............. (2)

Re-arrange the equations so that all variables are on the left sides:

2 = 4y - 3x  

⇔ -3x + 4y = 2   .......  (3)

5x = 2y - 3

⇔  5x - 2y = -3  ....... (4)

Choose one variable to eliminate. Let us choose y. Multiply equation (4) by 2, we get:

10x - 4y = -6   ....... (5)

Add equation (3) and (5)

-3x + 4y = 2

10x - 4y = -6 +

7x          = -4

 x          = -4/7

Substitute back  x = -4/7 into equation (3):

-3x + 4y = 2

-3.(-4/7) + 4y = 2

12/7 + 4y = 14/7

4y = 2/7

y = 2/28 = 1/14

Hence, the solution is (-4/7, 1/14)

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The measure of the given angle is 10 degrees.

Supplementary angles are those angles that sum up to 180 degrees.

Complimentary angles are those angles that sum up to 90 degrees

The supplement of the angle is 10° more than twice it's complement.

Therefore,

180 - x = 2(90 - x) + 10

open the brackets

180 - x = 2(90 - x) + 10

180 - x = 180 - 2x + 10

180 - 180 - 10 = -2x + x

-10 = -x

divide both sides by - 1

x = -10 / -1

x = 10

Therefore, the measure of the given angle is 10 degrees.

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Answer:

Step-by-step explanation:

you did that correctly but it will equal 90

The Simplified value of the expression 2(b-a)+5(b-a) is 7b-7a .

Distributive property for real numbers "a", "b" and  "c" is defined as

a(b-c)=a*b-a*c.

In the given question

=2(b-a)+5(b-a)

Applying Distributive Property

=2*b-2*a+5*b-5*a

=2b-2a+5b-5a

Combining the like terms together

=2b+5b-2a-5a

=7b-7a                          (adding the like terms )

Therefore , the Simplified value of the expression 2(b-a)+5(b-a) is 7b-7a .

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The dimensions of the base are 180 feet in length and 165 feet in width.

The whole length of any closed shape's boundary is known as its perimeter. Let's use an illustration to try to comprehend this. You may have a sizable square-shaped farm, for instance. You now decide to fence your farm in order to protect it from stray animals. Finding the entire length of the farm's boundary is as simple as multiplying the length of one side of the farm by 4. There are a lot of situations like this when we can be applying the perimeter-finding notion without even realizing it.

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The following set of numbers, 10, 16, and 18, can be the measures of the sides of an acute triangle.

To know if a set of number is a valid measure of the sides of a triangle, it must follow the Triangle Inequality Theorem which states that the sum of any two sides must be greater than the third side, such that a + b > c, a + c > b, and b + c > a.

let a = 10, b = 16, and c = 18

a + b > c     10 + 16 > 18     26 > 18     True

a + c > b     10 + 18 > 21     28 > 16     True

b + c > a     16 + 18 > 21     34 > 10     True

To know what type of triangle based on the length of its side:

1. Take the sum of the squares of the two smaller sides.

10^2 + 16^2 = 356

2. Compare it to the square of the largest side.

18^2 = 324

324 < 356

If the sum of the squares of the 2 is larger than the square of the 3rd, it is an acute triangle.

if they are equal, it is a right triangle

if they are smaller, then it is an obtuse triangle.

Hence, 10, 16, and 18 can be the measure of the sides of an acute triangle.

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The relationship between the ∠2 and ∠8 is that both are alternate exterior angles

Given,

The angles =∠2 and ∠8

Here,

∠2 and ∠8  are both lies on opposite sides of the transversal and they are nonadjacent exterior angles.

So, ∠2 and ∠8  are alternate exterior angles

Hence, the relationship between the ∠2 and ∠8 is, both are alternate exterior angles

The complete question is :

Classify the relationship between the pair of angles as alternate interior, alternate exterior, corresponding, or consecutive interior angles.

∠2 and ∠8

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If Jason starts building 5 feet out from the existing structure, and wants it to have a 60° angle, then the wall should be 10 feet long.

For given question,

Jason starts building 5 feet out from the existing structure, and wants it to have a 60°C angle.

The ground and the side of the play structure make a 90° angle.

So, the given triangle would be a - 30°- 60° - 90° - triangle.

The short side is 5 feet. The climbing wall will be the hypotenuse.

The angle opposite to the short side is 5 feet.

Now we need to find the hypotenuse.

Consider the sine of angle 30°

sin(30°) = 5/hypotenuse

1/2 = 5/hypotenuse

hypotenuse = 5 × 2

hypotenuse = 10

Therefore, if Jason starts building 5 feet out from the existing structure, and wants it to have a 60° angle, then the wall should be 10 feet long.

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The diameter and radius of circle is 24.84 feet and 12.42 feet.

We are given the circumference of circle. So, using the formula of circumference, we will find the diameter. As we know, the radius of circle is half of its diameter.

Performing calculation now -

Circumference = π×d, where d stands for diameter of circle.

Taking the value of π as 3.14.

Keep the values in formula to find the diameter of circle

Diameter = 78÷3.14

Performing division

Diameter = 24.840

Rounding to nearest hundredth -

Diameter = 24.84 feet

Now, calculating radius by the formula -

Radius = diameter÷2

Radius = 24.84÷2

Performing division to find the radius of circle

Radius = 12.42 feet

Hence, the diameter and radius of circle is 24.84 feet and 12.42 feet.

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The probability of hitting the area of the shaded region is 0.21 (in the form of two decimal places) when you throw a dar.

The probability is defined as the possibility of an event being equal to the ratio of the number of favorable outcomes and the total number of outcomes.

We have been given that the radius of the circle = 2cm

So one side of square = 2+2 = 4cm

Area of circle = πr² = (3.14) ×(2)²= (3.14)×4 = 12.57cm²

Area of square = (a)² = (4)² =16cm²

Then the area of the shaded region = 16−12.57 = 3.43cm²

So the probability of hits in the shaded region = 3.43/16 = 0.2144

Round to the nearest Hundredth (two decimal places).

The probability of hits in the shaded region = 0.21

Hence, the probability of hitting the area of the shaded region is 0.21 (in the form of two decimal places) when you throw a dar.

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The simpler form of the complex fraction [tex]\frac{x-2}{\frac{x+2}{\frac{x+1}{\frac{3}{\frac{x-1-1}{x+1} } } } }[/tex] is equal to

3(x-2)² / (x+2)(x+1)².

As given in the question,

Given complex fraction is [tex]\frac{x-2}{\frac{x+2}{\frac{x+1}{\frac{3}{\frac{x-1-1}{x+1} } } } }[/tex]

Simplify the given complex form :

[tex]\frac{x-2}{\frac{x+2}{\frac{x+1}{\frac{3}{\frac{x-1-1}{x+1} } } } }\\\\= \frac{x-2}{\frac{x+2}{\frac{x+1}{\frac{3}{\frac{x-2}{x+1} } } } }\\\\=\frac{x-2}{\frac{x+2}{\frac{x+1}{\frac{3}{\frac{x-2}{x+1} } } } } \\\\=\frac{x-2}{\frac{x+2}{\frac{(x+1)^{2}}{3(x-2)} } } \\\\=\frac{3(x-2)^{2}}{(x+2)(x+1)^{2}}[/tex]

Therefore, the simpler form of the complex fraction [tex]\frac{x-2}{\frac{x+2}{\frac{x+1}{\frac{3}{\frac{x-1-1}{x+1} } } } }[/tex] is equal to 3(x-2)² / (x+2)(x+1)².

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The solving for the Segment CE is congruent to segment BC is bellow.

Congruent segments are those with the same length. Collinear points are those that are on the same line. A theorem is a mathematically proven proposition. A segment's midway is a point that divides one segment onto two congruent segments.

Congruent lines are two line segments that have the same length. For example, if we possess two 6 cm line segments AB as well as PQ, we may say AB PQ and so they are congruent.

Solving for the right column:

C is the midpoint of segment AE

C is the midpoint of segment BD

Segment AE is congruent to segment BD(given)

2. BC = EC

   BC=CD

3. AE=BD

4. BD = BC + CD

   AE=AC+CE

5. AC+CE=BC+CD

6. CE+CE=BC+BC

7. 2CE=2BC

8. CE=BC

9. Segment CE is congruent to segment BC.

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The equation in slope-intercept form is y = -2/3x + 6

Given,

Points (x, y) = (6, 2)

Parallel to y = -2/3x + 1

Now,

Recall that a parallel line to the one given has to have the same slope. The slope of the line given is "-2/3" (the coefficient that accompanies "x").

Therefore the equation of a parallel line has to be of the form:

y = -2/3x + b

2 = -2/3(6) + b

2 = -12/3 + b

2 = -4 + b

b = 6

So the equation now becomes:

y = -2/3x + 6

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Answer:

16red 24yellow in total  40

Step-by-step explanation:

8 x 2 =16

12 x 2 = 24

The following set of numbers, 20, 21 and 31, can be the measures of the sides of an obtuse triangle.

A triangle is a polygon with three sides and three vertices.

To know if a set of number is a valid measure of the sides of a triangle, it must follow the Triangle Inequality Theorem which states that the sum of any two sides must be greater than the third side, such that a + b > c, a + c > b, and b + c > a.

let a = 20, b = 21, and c = 31

a + b > c     20 + 21 > 31     41 > 31     True

a + c > b     20 + 31 > 21     51 > 21     True

b + c > a     21 + 31 > 21     52 > 20     True

To know what type of triangle based on the length of its side:

1. Take the sum of the squares of the two smaller sides.

20^2 + 21^2 = 841

2. Compare it to the square of the largest side.

31^2 = 961

961 > 841

If the sum of the squares of the 2 is larger than the square of the 3rd, it is an acute triangle.

if they are equal, it is a right triangle

if they are smaller, then it is an obtuse triangle.

Hence, 20, 21 and 31 can be the measure of the sides of an obtuse triangle.

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Answer:

The rabbit will get hit because the car takes too long to break

Step-by-step explanation:

Answer: x = 32.0°

Step-by-step explanation:

When the sum of two angles is equal to 90 degrees, they are called complementary angles.

x + 58° = 90°

x = 90° - 58°

x = 32.0°

Answer:

KN = 45, NM= 31, m<K = 61° m<L = 119°, m<M = 61°

Step-by-step explanation:

Given: KL = 31 LM = 45 N = 119°

This is a parallelogram so sides will equal.

KL = NM (31) LM = KN (45)

The inside of a parallelogram equals 360°. Opposite angles are congruent.

L = N (119°) So, 119 + 119 = 238

360 - 238 = 122

122 ÷ 2 = 61°

So, K = 61° M = 61° L = 119°

The simplication of the given expression is (3x - 8) /4x² and the restriction on the variable in the denominator of the given expression is x ≠ 0.

According to the given question.

We have an expression 3/4x - 2/x^2

Since, we have to simplify the above expression.

Therefore,

3/4x - 2/x²

⇒ (3x - 8) /4x²

Hence, the simplication of the given expression is (3x - 8) /4x².

Also, we have to find the restriction on variable.

As we know that, we never divide by 0, a restriction on the variable of a rational function with a linear denominator would be any value of the variable that makes the linear denominator equals to 0.

So, for the restriction on the variable.

Set the denominator equals to 0.

⇒ 4x² = 0

Solve for x

x = 0 ( because 4 ≠ 0)

The denominator is 0 when x = 0. This is the only value that makes the given expression undefined.

Therefore, the restriction on the variable in the denominator of the given expression is x ≠ 0.

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Answer:

x = - 10/3

Step-by-step explanation:

1. Add 4 to both sides

6x = -20

2. Simplify

x = - 10/3

The new mural created by Rhianon, which is 33 inches longer, has a perimeter of 1024 inches.

Perimeter refers to the total distance around a two-dimensional figure. The perimeter of a rectangle is the sum of all its 4 sides and is given by the formula

P = 2l + 2w

where l = length

w = width

If a rectangular mural measures 234 inches by 245 inches, length is usually longer than the width, and Rhianon creates a new mural that is 33 inches longer, then the length of Rhianon's mural is:

l = 245 inches + 33 inches

l = 278 inches

If the new mural is the same as the width of the rectangular mural and its length is 278 inches, then the perimeter can be solved using the formula for the perimeter of a rectangle.

P = 2l + 2w

P = 2(278 inches) + 2(234 inches)

P = 556 inches + 468 inches

P = 1024 inches

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The order of the sides from smallest to largest is: WX, XY, YW

Given: [tex]\angle[/tex] X = 90° (right angle) and [tex]\angle[/tex] W = 51°

The sum of the interior angles of any triangle is 180°, then

[tex]\angle[/tex] W + [tex]\angle[/tex] X + [tex]\angle[/tex] Y = 180°

Replacing the given values then we get

51° + 90°+ [tex]\angle[/tex] Y = 180°

141° + [tex]\angle[/tex] Y = 180°

Solving for  [tex]\angle[/tex] Y

Subtracting 141° both sides of the equation:

141° + [tex]\angle[/tex] Y - 141°=180° - 141°

[tex]\angle[/tex] Y = 39°

The order of the angles from smallest to largest is:

[tex]\angle[/tex] Y = 39°, [tex]\angle[/tex]  W = 51°, [tex]\angle[/tex] X = 90°

The opposite sides to these angles must be ordered in the same way:

Opposite side to  [tex]\angle[/tex] Y: WX

Opposite side to  [tex]\angle[/tex] W: XY

Opposite side to  [tex]\angle[/tex] X: YW

The order of the sides from smallest to largest is: WX, XY, YW

Therefore, the correct answer is option C. WX, XY, YW

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Answer:

If two variables have a cause-and-effect relationship, then the variables will have a correlation.

Step-by-step explanation:

Answer:

16.97

Step-by-step explanation:

[tex]BF=\sqrt{(-2-0)^2 + (1-3)^2}=2\sqrt{2} \\ \\ BC=\sqrt{(0-4)^2 + (3-(-1))^2}=4\sqrt{2}[/tex]

So, the perimeter is

[tex]2(4\sqrt{2}+2\sqrt{2})=12\sqrt{2} \approx 16.97[/tex]

Parenthesis

Exponents

Multiplication

Division

Addition

Subtraction

Multiplication and Division - whatever comes first from left to right (i.e. 6*7*2, do 6*7 first)

Addition and Subtraction - same thing as multiplication and division, whatever comes first