Please help me with this assignment! Grade 8th math

There are 24 possible arrangements that begin with letter R

Combinations are used to determine the number of selections of an item within another while permutation is used for arrangements

The arrangements of the digits is an illustration of factorials

The word is given as: SHREK

If the first letter begins with the letter R, then we have the following possible arrangements

The number of arrangement is the product of the above values

So, we have

Arrangement = 1 * 4 * 3 * 2 * 1

Evaluate

Arrangement = 24

Hence. there are 24 possible arrangements that begin with letter R

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Answer:

87

Step-by-step explanation:

5/2 ×30 = 75

2/5× 30=12

75 +12 = 87

Therefore , the total number of cars they altogether is 87

Answer:

2000

Step-by-step explanation:

After solving, the factors of the equation x²+7x-8=0 are:

So,

Then,

Factors are:  (x + 8) and (x - 1)

Therefore, after solving, the factors of the equation x²+7x-8=0 are:

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The distances from base location to first and second accident site is 2551 feet and 4347.8 feet.

The angle of depression is 63° and 49°. Also, joining the base location, accident site and position of helicopter, we will get a right angled triangle. Using tangent of given angle we will find the distance between base location and accident site.

Distance of first accident site

tan theta = perpendicular ÷ base

tan 63° = 5000 ÷ base

Base = 5000 ÷ 1.96

Base = 2551 feet

Distance of second accident site

tan 49° = 5000 ÷ base

Base = 5000 ÷ 1.15

Base = 4347.8 feet

Therefore, the distance of base location to first accident site is 2551 feet and distance to second accident site is 4347.8 feet.

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Answer:

85%

Step-by-step explanation:

[tex]\frac{17}{20} * 100 = 85[/tex]

Answer:

85%

Step-by-step explanation:

See attachment for answers.

5x-12-6x=-10x+7-1

=5x-6x+10x=7-1+12

= 9x=18

=9x/9=18/9

=x=2

The required zeros of the polynomial f(x) are  2, -2, and ±√-4.

What are zeros of the polynomial?

All the possible values of x that will make the polynomial zero are called the zeros of the polynomial, p(x). Zeros of a polynomial can either be negative or positive.

Solving for the zeros of a polynomial

f(x)=x⁴ - 16

Let, f(x) = 0

x⁴-- 16 = 0

(x²)² - 4² = 0

(x² + 4) (x² - 4) = 0

(x² + 4)(x - 2)(x + 2) = 0

i.e. x² + 4 = 0, x - 2 = 0, x + 2 = 0

x = 2, -2, ±√-4

Hence, the required zeros of the polynomial f(x) are  2, -2, and ±√-4.

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The percent of surface sunlight intensity that reaches a depth of 370 feet is 0.0017%

We have been given the function which models the intensity of sunlight beneath the surface of the ocean which is

                    y = [tex]20 * (0.975)^{x}[/tex]    (1)

where, y = the percent of surface sunlight intensity that reaches a depth of    x feet.

            x = depth in feet

b) We need to find the percent of sunlight at a depth of 370 feet that is we have been given, x = 370feet.

putting the required values in equation (1) we get

                [tex]y = 20*(0.975)^{370}[/tex]

                y = 20* 0.000085

                y = 0.0017%

Hence 0.0017% of sunlight intensity reaches a depth of 370 feet

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25 5-ounce-glasses of milk can be poured out from a gallon of milk and 3/5 ounces of milk will be left over

Assuming

1 gallon 4 quarts

1 quart 2 pints

1 pint 2 cups

1 cup = 8 fluid ounces

if 1 quart 2 pints, then 4 quarts will be

= 4 * 2 = 8 pints

if 1 pint 2 cups, then 8 pints will be

= 8 * 2 = 16 cups

if 1 cup is 8 fluid ounces, then 16 pints will be

= 8 * 16 = 128 fluid ounces

solving the amount of 5 ounce glasses of milk in a ballon

= 128 / 5

= 25.6

= 25 3/5

Hence we can say that a gallon of milk will give 25 5-ounce-glasses of milk and 3/5 ounces of milk left over

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Answer:1 gallon 4 quarts

1 quart 2 pints

1 pint 2 cups

1 cup = 8 fluid ounces

if 1 quart 2 pints, then 4 quarts will be

= 4 * 2 = 8 pints

if 1 pint 2 cups, then 8 pints will be

= 8 * 2 = 16 cups

if 1 cup is 8 fluid ounces, then 16 pints will be

= 8 * 16 = 128 fluid ounces

solving the amount of 5 ounce glasses of milk in a ballon

= 128 / 5

= 25.6

= 25 3/5

Hence we can say that a gallon of milk will give 25 5-ounce-glasses of milk and 3/5 ounces of milk left over

Step-by-step explanation:

Answer:

6._ _ is the hundreth.

Since the diget after 6 is infact greater than or equal to 5.. (8>5).

We can round up to 6.17

The required simplication of rational expression is -(4 + x) / (x - 5).

What is a rational number?

Any real number that can be represented in the form of p/q, where q is not equal to 0 is called a rational number. The decimal expansion of rational numbers is terminating and repeating.

Simplifying the rational expression, 12 - x - x² / x² - 8x + 15

Given a rational expression,

12 - x - x² / x² - 8x + 15

On simplifying, we get,

For numerator, 12 - x - x²: (3 - x)(4 + x)

For denominator, x² - 8x + 15: (x - 5)(x - 3)

Now, 12 - x - x² / x² - 8x + 15 = (3 - x)(4 + x) / (x - 5)(x - 3)

= -(4 + x) / (x - 5)

Restriction is that the denominator, x - 5 should not be 0.

Hence, the required simplication of rational expression is -(4 + x) / (x - 5)

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The common rate of both expressions are equal, so the expressions 64,96 and 60,90 are proportional

The expressions are given as

64,96 and 60,90

Rewrite the expressions as

(x, y) = (64,96) and (60,90)

As a general rule

Proportional expressions have the same constant rate

The constant rate (r) of the expressions is then calculated as

r = y/x

For the expression (64, 96), we have the following computation

r = 96/64

Evaluate the quotient

So, we have

r = 1.5

For the expression (60, 90), we have the following computation

r = 90/60

Evaluate the quotient

So, we have

r = 1.5

The common rate of both expressions are equal i.e. 1.5

Hence, the expressions 64,96 and 60,90 are proportional

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Using the properties of logarithm the value of the expression is  [tex]log_{6} 12 + log_{6} 3 = 2[/tex]

A logarithm is the power to which a number must be raised in order to get some other number.

According to the question we have been given the logarithmic expression as

                        = [tex]log_{6} 12 + log_{6} 3[/tex]

The properties of logarithm that we are going to use are :

  [tex]log(x*y) = logx + logy[/tex]   and   [tex]log_{a} a = 1[/tex]

Also we can see that the base are same so we can use the property of logarithm in the given equation.

Now solving it step by step using the properties of logarithm we get

                    [tex]= log_{6} (12*3)\\= log_{6} 36\\= log_{6} 6^{2} \\= 2* log_{6} 6\\= 2*1\\ = 2[/tex]                      

Hence using the properties of logarithm the value of the expression is [tex]log_{6} 12 + log_{6} 3 = 2[/tex]

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Answer: 1/23

Step-by-step explanation:

x=multiplicative inverse of 23

23*x=1

23x=1

23x/23=1/23

x=1/23

We will know 8 complete names after 2 days and 20 complete names after 8 days.

Here, we are given an exponential function: f(t)= c{1- [tex]e^{-kt}[/tex]}

where f(t) = number of tasks learned.

c = total number of tasks to be learned

k = rate of learning

t = time

Now, when we move to a new school, number of names we need to learn ⇒ c = 25

learning rate for new tasks = 20%

⇒ k = 0.2

and time = 2 days

⇒ t = 2

Substituting these values in the given function we get-

f(2) = 25{1- [tex]e^{-0.2 *2}[/tex]}

= 25{1- [tex]e^{-0.4}[/tex]} [tex]e^{-0.4}[/tex]

= 0.67

Thus, f(2) = 25( 1-0.67 )

f(2) = 25(0.33)

f(2) = 8.25

Thus, we will be able to learn 8 complete names in 2 days.

If t = 8f(8) = 25{1- [tex]e^{-0.2 * 8}[/tex]}

= 25{1- [tex]e^{-1.6}[/tex]}

= 25(1- 0.20)= 25(0.80)

= 20

Thus, we will be able to learn 20 complete names in 8 days.

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Answer:

2/-9

Step-by-step explanation:

Answer:

[tex]\sf x^{13}[/tex]

Step-by-step explanation:

If bases are same, add the exponents.

   [tex]\sf \boxed{a^m*a^n =a^{m+n}}[/tex]

[tex]\sf x^{10}*x^3} = x^{10+3}\\[/tex]

            [tex]\sf = x^{13}\\[/tex]

Hey there!

x^10 * x^3

x^10

= x * x * x * x * x * x * x * x * x * x

x^3

= x * x * x

x * x * x * x * x * x * x * x * x * x + x * x * x

= x^13

Or

10 + 3 = 13

Therefore, your answer should be:
x^13

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

Answer:

Standard notation/form

-1.91 × 10³

Hope this helps.

Answer:

Hi the answer to that question is 2

The action that is an example of someone taking action to accept personal responsibility for eating right is writing down foods consumed at each meal in a day.

There are several ways to take responsibility for our eating habits and one of them is to write down the foods that we consume during each meal that we take in a day.

This would enable us to keep track of the calories we consume and therefore give us a better idea of which foods to eat and which to avoid to maintain our recommended dietary intake.

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Answer:

Which action is an example of someone taking action to accept personal responsibility for eating right?

(A.) continuing to eat while watching television

(B.) consuming high-fat foods every day

(C.) writing down foods consumed at each meal in a day

(D.) going to the store on an empty stomach

Step-by-step explanation:

2022-2023 :)

Caroline and Rodney, on their way to the canoe livery, stopped to eat lunch at the point on their map with coordinates of (-2, -1).

The coordinates of a point on a two dimensional plane are two numbers that define its location.

The given coordinates of the journey are;

Required; The coordinates of the map where Caroline and Rodney stopped for lunch.

Solution:

The coordinates of a point (x, y), which is a proportion, t, of the distance between two points (a, b), and (c, d) is given by the formula;

x = a•(1 -t) + c•t

y = b•(1 -t) + d•t

The location where they had lunch is therefore;

x = -4×(1 - (1/3)) + (1/3)×2 = -2

y = -3×(1 - (1/3)) + (1/3)×3 = -1

The points is therefore; (-2, -1)

The coordinates on the map where Caroline and Rodney stopped for lunch is (-2, -1)

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The required ratio of the input value to the output value is 1:3.

A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0.

Given:

Input   Output

 2             6

 3             9

 6             18

Now, the ratio is

2/6 = 1/3

and,  3/9 = 1/3

6/18 = 1/3

Hence, the ratio is 1:3.

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The radical expression of the term (x⁻¹⁰ / x⁵)²/⁵ is ⁵√(1/x¹⁰)

 A radical is a number that is denoted by a root and can be easily identified because before the number is the symbol √, which lets us know that it is a root.

In this case we have an exponential number since it is raised to a number, radicals can be expressed as powers raised to fractions as follows:

√a = a¹/²

 We reduce the fraction value

(x⁻¹⁰ / x⁵) = x⁻⁵ = 1/x⁵

 If our term is raised to 2/5, it can be expressed as:

(1/x⁵)²/⁵ = ⁵√(1/x⁵)² = ⁵√(1/x¹⁰)

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An expression for the combined total dollar amount he earned this month:

Total Earning = 15b + P(N - b)

where, b is the total hours worked as a tutor

P is the amount earned by Ryan per hour as a waiter

N is the total number of possible hours Ryan can work in a month

In this question,

Ryan works as a tutor for $15 an hour and as a waiter for $10 an hour. This month, he worked a combined total of 81 hours at his two jobs.

Let the number of hours Ryan works daily as a waiter be x

and the number of hours worked daily as a tutor be y

Ryan earns $15 per hour as tutor.

So, we get an expression for the daily earnings on tutoring = 15y

Let Ryan earns $P per hour as waiter.

so, we get an expression for the daily earning as a waiter = Px

The total possible hours Ryan can work in a month is dependent on conditions not specified.

Assuming 24 working days (6 days weekly for 4 weeks) in a month with maximum approved work hours of 12 hours daily, the total hours Ryan can work will equal 24 x 12 = 288 hours

This 288hrs is an estimate and can change based on applicable hours of work daily and number of working days in a month; it can also be represented as N

If b is the total hours Ryan worked as a tutor this month, the hours Ryan can work as a waiter in a month is equal to 288 - b

So, in a month, Ryan will earn 15b as a tutor and P(288-b) as a waiter or optionally P(N - b)

So, the combined dollar amount earned in a month is:

Total Earning = 15b + P(N - b)

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The inverse of the function y = log₀.₅ x is f⁻¹ (x) = (0.5) ˣ.

We are given the function:

y = log₀.₅ x

We need to find the inverse of the function.

First we will find the value of x in terms of y.

The logarithm of a given number x is the exponent to which another fixed number, the base b, must be raised, to produce that number x.

We can write it as:

(0.5)^ y = x

x = (0.5) ^ y

now, the inverse of the function will be:

f⁻¹ (x) = (0.5) ˣ

Therefore, the inverse of the function y = log₀.₅ x is f⁻¹ (x) = (0.5) ˣ.

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Answer:I think its 2x-5/3

Step-by-step explanation:

please let me know if I'm wrong.