8th grade math plz help

Answer:

1 3/4

Step-by-step explanation:

OK but what if brainliest instead

Answer:1 3/4

Step-by-step explanati

The resulting product of the expression is 13 1/8

Fractions are written as a ratio of two integers

Given the following expression

-4 1/6 * -3 15/100

Convert to improper fraction to have:

-25/6 * -315/100

-1/6 * -315/4

315/24

13 1/8

Hence the resulting product of the expression is 13 1/8

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d. 15p + 100 = 30p + 75

Answer:

b = 0.5

Step-by-step explanation:

a = b x h

7 = 14b  Divide both sides by 14

0.5 = b

Answer:

38 degrees

Step-by-step explanation:

Angle 38 and b are the same.

Answer:

Blank 1: 97

Blank 2: 73

Step-by-step explanation:

This equation is shown on a straight line, which equals 180.

We can start by adding the two equations which together are equal to 180.

15x + 2 + 10x + 3 = 180

We can simplify it to 25x + 5 = 180

Now we can subtract 5 from both sides to get

25x = 175

Then we can divide both sides by 25 to get x = 7

Now we can plug in x for both angles

Angle RQS is 15x + 2, so 15*7=95 and the +2 is 97.

Angle TQS is 10x + 3 so 10*7=79 and the + 3 is 73

:D

The equations that match the diagram are 18 ÷ 3 = x + 5 and 3(x + 5) = 18

The given parameters are

Expression = x+5\x+5\x+5

Value = 18

The above means that

Expression = Value

So, we have

x + 5 + x + 5 + x + 5 = 18

Evaluate the sum

So, we have

3x + 15 = 18

Factor out 3

So, we have

3(x + 5) = 18

Divide both sides by 3

So, we have

x + 5 = 18 ÷ 3

Hence, the equations that match the diagram are 18 ÷ 3 = x + 5 and 3(x + 5) = 18

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The proof of the inequality → (a + b)²/2 ≥ 2ab, is given below -

We have the following inequality -

(a + b)²/2 ≥ 2ab

We have to prove it.

An inequality is a relation which makes a non-equal comparison between two numbers or other mathematical expressions.

According to the question, we have -

Inequality -

(a + b)²/2 ≥ 2ab

Proof -

Starting from the inequality - (a - b)² ≥ 0

(a - b)² ≥ 0

a² + b² - 2ab ≥ 0

a² + b² - 2ab + 2ab ≥ 2ab

a² + b² ≥ 2ab

Add - 2ab on both sides, we get -

a² + b² + 2ab ≥ 4ab

(a + b)² ≥ 4ab

Divide both sides by 2, we get -

(a + b)²/2 ≥ 2ab

Hence Proved.

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Answer:

36 = 2 x 2 x 3 x 3

Answer:

2 2/3 * 2 2/3 = 64/9 = 7 1/9 ≅ 7.1111111

Step-by-step explanation:

The result:

2 2/3 * 2 2/3 = 64/

9

= 7 1/

9

≅ 7.1111111

Spelled result in words is sixty-four ninths (or seven and one ninth).

How do we solve fractions step by step?

Conversion a mixed number 2 2/

3

to a improper fraction: 2 2/3 = 2 2/

3

= 2 · 3 + 2/

3

= 6 + 2/

3

= 8/

3

To find a new numerator:

a) Multiply the whole number 2 by the denominator 3. Whole number 2 equally 2 * 3/

3

= 6/

3

b) Add the answer from previous step 6 to the numerator 2. New numerator is 6 + 2 = 8

c) Write a previous answer (new numerator 8) over the denominator 3.

Two and two thirds is eight thirds

Multiple: 8/

3

* 8/

3

= 8 · 8/

3 · 3

= 64/

9

Multiply both numerators and denominators. Result fraction keep to lowest possible denominator GCD(64, 9) = 1. In the following intermediate step, it cannot further simplify the fraction result by canceling.

In other words - eight thirds multiplied by eight thirds is sixty-four ninths.

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Answer:

almost.

Step-by-step explanation:

You can write almost every linear equation in slope-intercept form.

Slope-intercept form is:

y = mx + b

So every line except a vertical line can be written in the form y=mx+b.

This form cannot be used when m is undefined.

Answers:

A ' = (-3, -3)

B ' = (1, 0)

C ' = (2, -6)

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

Explanation:

To translate 6 units to the left, we subtract 6 from each x coordinate.

For point A, we have x = 3 become 3-6 = -3 as the new x coordinate.

Point A also goes down 7 units, in which we subtract 7 from the y coordinate. So the y coordinate of point A, which is 4, becomes 4-7 = -3 as the new y coordinate.

This is how we can write out the work shown for moving point A

[tex](\text{x},\text{y})\to(\text{x}-6,\text{y}-7)\\\\(3,4)\to(3-6,4-7)\\\\(3,4)\to(-3,-3)[/tex]

Point A is at (3,4) and moves to A ' which is at (-3, -3)

Do similar steps for points B and C to get the answers shown above.

Based on the information given, the value of x is 40 degrees

Corresponding angles are defined as any pair of angles which on the same side of one or two lines, there is a  cut through by a transversal.

It is also important to note that when a transversal intersects two parallel lines, the corresponding angles of the lines would be equal.

Given the angles;

We have that;

Angle 2 = Angle 3

Substitute the values

2x + 5 = 85

collect like terms

2x = 85 - 5

2x = 80

Make 'x' the subject by dividing both sides by 2

2x/ 2 = 80/ 2

x = 40 degrees

Thus, the value of x is 40 degrees

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Answer:

698,000

Step-by-step explanation:

7×10^5=700000

2×10^3=2000

700,000-2000=698,000

The given 7 * [tex]10^5[/tex] is 3.5*10² times larger than 2 * 10³.

Given that,

To determine, how many times larger is 7 x 10^5 than 2 x 10^3.

The ratio can be defined as the comparison of the fraction of one quantity towards others. e.g.- water in milk.

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

Here,
We have two values, here we have to determine the relationship between the two values.

[tex]ratio = 7*10^5 / 2 * 10^3\\Ratio = 3.5 * 10 ^2[/tex]
Implies,
[tex]7*10^5 = 3.5*10^2 (2 * 10^3)[/tex]

Thus, the given 7 * [tex]10^5[/tex] is 3.5*10² times larger than 2 * 10³.

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Scale factor 1.5

Let O (0,2)  as the centre of enlargement

A (0, 0)

B (-2, 0)

C (-2, 4)

Step 1:

First draw lines from point O through A, B and C, as shown in the image attached below

Step 2:

Measure the length O A and multiply it by 1.5 to get the distance from O of the image point A';

<=> O A' = 1.5 × O A.

<=> OA' = 1.5 * [tex]\sqrt{2^2}[/tex]

<=> OA' = 1.5*2

<=> OA' = 3

Mark the point A' on the diagram

Step 3:

The images B' and C' can then be marked in a similar way and the enlarged triangle A' B' C' can then be drawn.

OB' = 1.5OB

<=> OB' = 1.5 *[tex]\sqrt{( 2^2+2^2}[/tex]

<=>  OB' = 1.5*2[tex]\sqrt{2}[/tex]

<=> OB' = 3[tex]\sqrt{2[/tex]

OC' = 1.5*[tex]\sqrt{2^2+2^2}[/tex]

<=> OC' = 1.5*2[tex]\sqrt{2[/tex]

<=> OC' = 3[tex]\sqrt{2}[/tex]

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It should be noted that based on the information given, the square root of 225 will be A. 15.

It should be noted that a number y such that y² = x, or a number y whose square is x, is referred to as the square root of a number x in mathematics. For instance, since 4² = 16, 4 and -4 are the square roots of 16.

It should be noted that in this case, the square root of 225 will be:

= ✓225

= 15

Therefore, it should be noted that based on the information given, the square root of 225 will be 15.

In conclusion, based on the information, the correct option is A.

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The value of x based on the information given about the circumference is 2.24.

It should be noted that the circumference is calculated as:

= 2πr

where

π = 3.142

r = radius = 4x - 5.

Circumference = 25

Therefore, circumference = 2πr.

(2 × 3.142)(4x - 5) = 25

6.284(4x - 5) = 25.

25.136x - 31.42 = 25

Collect like terms

25.136x = 25 + 31.42

25.136x = 56.42

x = 56.42 / 25.136

x = 2.24

Therefore, the value of x based on the information given about the circumference is 2.24.

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Answer:

y = 2/3x - 8/3

or 2x = 3y + 8

Step-by-step explanation:

2x = 3y + 4

3y = 2x - 4

y = 2/3x - 4/3

If two lines are parallel, their slopes are equal

if m = 2/3, y = -2, x = 1

y = mx + b

-2 = 2/3(1) + b

-2 = 2/3 + b

b = -2 - 2/3 = -8/3

y = 2/3x - 8/3

or 3y = 2x - 8

or 2x = 3y + 8

Using translation concepts, the graph that shows that function f(x) = x with an input of f(x - 3) is given by:

A coordinate plane with a line passing through (negative 2, negative 5), (0, negative 3), and (3, 0).

The input of the function, of f(x - 3), is missing.

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction either in it’s definition or in it’s domain. Examples are shift left/right or bottom/up, vertical or horizontal stretching or compression, and reflections over the x-axis or the y-axis.

For this problem, the function is:

f(x) = x.

The translation is in the input, f(x - 3), meaning that the function is shifted 3 units right and defined by:

f(x - 3) = x - 3.

Hence three points on the graph are:

Hence the correct description is:

A coordinate plane with a line passing through (negative 2, negative 5), (0, negative 3), and (3, 0).

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Answer:

D

Step-by-step explanation:

The inequality form of the given expression is:

x < -8 or x > 0

The interval notation is : (−∞,−8)∪(0,∞)

Given, the expression is |x + 4| - 4 > 0

An inequality is a relationship that shows a non-equal comparison between two numbers or mathematical expressions.

Isolate the variable by dividing each side by factors that don't contain the variable.

⇒  |x + 4| - 4 > 0

⇒  |x + 4|  > -4

Remove mod.

⇒ x + 4 > -4 or  x - 4 > -4

⇒ x > -4 -4 or x > -4 +4

⇒ x <-8 or x > 0

Hence the internal notation is :

(−∞,−8)∪(0,∞)

The required graph is plotted.

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The length of a right triangle's hypotenuse with a theorem created long ago is c² = a² + b², where 'c' = the hypotenuse of the right triangle and 'a' and 'b' are the other two legs.

We need to find the length of a right triangle's hypotenuse with a theorem created long ago.

The Pythagoras theorem which is also referred to as the Pythagorean theorem explains the relationship between the three sides of a right-angled triangle. According to the Pythagoras theorem, the square of the hypotenuse is equal to the sum of the squares of the other two sides of a triangle.

The Pythagoras theorem equation is expressed as, c² = a² + b², where 'c' = hypotenuse of the right triangle and 'a' and 'b' are the other two legs. Hence, any triangle with one angle equal to 90 degrees produces a Pythagoras triangle and the Pythagoras equation can be applied in the triangle.

Therefore, the length of a right triangle's hypotenuse with a theorem created long ago is c² = a² + b², where 'c' = hypotenuse of the right triangle and 'a' and 'b' are the other two legs.

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Answer:

y = -1/2 x + 1.

Step-by-step explanation:

The slope is -1/2.

The y intercept is at y = 1

So, it's

y = -1/2 x + 1.

The table that represents the linear function is table (B)

As a general rule, a linear function is any function that has a constant rate of change

This means that as the function independent value changes by a constant, the function dependent value changes by a constant

In other words, as the function x value changes by a constant, the function y value changes by a constant

Using the above as a guide, we can see the table B represents a linear function

This is so because, as x increases by 3, the y value decrease by -2

Hence, the table that represents the linear function is table (B)

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Answer:

f(-2) = -1

Step-by-step explanation:

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Answer: f(-2) = 5

Step-by-step explanation: In this piecewise function, when x is less than -1, the equation is -3x-1. -2 is less than -1 so we use the first equation. -3(-2)-1= 6-1 = 5.

Answer:

1 & 4

Step-by-step explanation:

because 3 & 5 is a reflection, 2 & 6 is a translation.

Answer:

8 feet

Step-by-step explanation:

Since it is 2 inches and 1 inch is equal to 4 feet, you just multiply 2 inches by 4 feet which will give you 8 feet.

Hope that helps

Answer: 1

I did this problem a couple times and got 1 every time

Answer:

5

Step-by-step explanation:

Both answers equal 25.

Answer:

33.7

Step-by-step explanation:

Complementary angles are angles that when added, sum up to 90*

First, make the equation, x being the missing angle
90*= x + 56.3

Rewrite the equation to find the missing angle
90 - 56.3 = x

x= 33.7

Answer:33.7°

Step-by-step explanation:

To find the complement of an angle, subtract that angle's measurement from 90 degrees. The result will be the complement

90° - 56.3°

=33.7°

The car's average acceleration is 8.44 ft/s².

Acceleration is defined as the rate of change of velocity per unit time. It is usually denoted by the letter a.

Here, we are given that a car travels on a straight road. Starting from rest, the car is going at 38 ft/s (26 mi/h) at the end of 4.5 s.

Acceleration of an object can be calculated using the given formula-

acceleration = velocity/ time

Here, the velocity of the car will be 38 ft/s

and the time is equal to 4.5 seconds.

Thus, putting these formulas in the equation, we get-

acceleration of the car = 38/ 4.5

= 380/ 45

= 8.44

Thus, the car's average acceleration is 8.44 ft/s².

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