f(n) = n - 7
f(-9k) =

if I am correct that is the solution.

Answer:

X:15

Step-by-step explanation:

only a genius can explain i can ask my colic to help

Answer:

Step-by-step explanation:

4/15

Based on the concept of fraction, 80p is equivalent to 4p/15p as a fraction of £3.

Fraction is a term that is used to describe the portion or part of the whole thing.

Generally, the term fraction represents the equal parts of the whole. A fraction has two parts, namely numerator and denominator.

In this case, to find the fraction of 80p as a fraction of £3, we divide 80p by £3.

Since there are 100 pence in 1 pound the fraction can be expressed as 80p/£3.

To simplify the fraction divide both the numerator and the denominator by 10:

80p/£3 = 8p/30p

Simplifying further both the numerator and the denominator can be divided by 2:

8p/30p = 4p/15p

Therefore, in this case, it is concluded that 80p is equivalent to 4p/15p as a fraction of £3.

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Based on the number of reading groups, and the number of absent students, the expression for the problem is (7 x 5) - 3.

Every reading group taught by Mr. Lou has 5 students. There are also 7 reading groups. This means that the total number of students under Mr. Lou is:

= Number of reading groups x Number of students per group

= 7 x 5

Then out of this total number, 3 students are absent. The expression then becomes:

= Number of students - Number o absent students

= (7 x 5) - 3

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Answer:

231+26=x

x=257 pounds

The amount of sugar that went into each pitcher was 0.375, which was taken from the 3(3/4) cups of sugar utilized for the lemonade stand.

Division allows us to divide a large number of objects into equal-sized groups. Division is represented by the symbol ÷.

We can use the distributive property to divide larger numbers by breaking them down into smaller factors.

It is implied that Lucy made her lemonade stand using 3 3/4 cups of sugar.

Further, she distributed the sugar into 6 pitchers in equal portions.

Therefore, we need to divide the total cups of sugar by 6 to get the value of sugar that went into each pitcher.

sugar went into each pitcher = 3(3/4) ÷ 6

                                                 = (9/4) ÷ 6

                                                 = 2.25 ÷ 6

                                                 = 0.375

Therefore, each pitcher of sugar contained 0.375 of the 3(3/4) cups of sugar utilized for the lemonade stand.

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Answer:

T. The vertex is where the angle is measured. It is often associated as the vertex angle.

Step-by-step explanation:

Hope it helps! =D

Answer:

T is the vertex

Step-by-step explanation:

the point where the angle lies , is the vertex, in this case T

using the letters forming the angle , with the vertex T placed in the middle

∠ STU or ∠ UTS

The value of 7.2 × 10^-4 divided by 3 × 10^-3 when expressed in scientific notation is 2.4 × 10^-7.

It should be noted that scientific notation is simply used to illustrate the numbers that are either too large or too small. It is denoted as a × 10ⁿ.

It should be noted that the exponents will be added. Therefore, 7.2 × 10^-4 divided by 3 × 10^-3 will be:

= 7.2 × 10^-4 / 3 × 10^-3

= 2.4 × 10^-7.

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Answer:

Guess it's 7.040 yards in 4 miles

Step-by-step explanation:

8.800÷5= 1.760 in 1 yard

4×1.760=7.040

prove me wrong

Answer:

In both number lines, from 0-8,800 and 0-5 there are 5 notches from the first and last, so what you first want to do is solve for the first number line. You can do this by divideing the largest number by the number of notchest on the line:

8,800/5 = 1760

So the notch after 0 will be 1760. To finish the pattern, you want to add the number you got after dividing the total, by itself, 4 more times, as shown:

1,760 + 1,760 = 3,520

3,520 + 1,760 = 5,280

5,280 + 1,760 = 7,040

7,040 + 1,760 = 8,800

Now the number line will look like this:

0, 1760, 3520, 5280, 7040, 8800

0, 1, 2, 3, 4, 5

Compared to the second number line we find that there are 7,040 yards in 4 miles!

Step-by-step explanation:

Hope it helps! =D

The time (in hours) taken by the bus and the car to travel between the two towns in terms of x is 5 hours 20 minutes and 4 hours respectively and the equation in x formed is [tex]x^2 + 15x -2700=0[/tex]

Given that:-

Distance between towns A and B = 240 km

A bus takes 80 minutes longer than a car to travel between the two towns.

The car is travelling at 15 km/h faster than the bus which is travelling at x km/h.

Let the speed of the bus be s km/hr and,

The time taken by the car to travel from A to B be t hours.

Hence,

(15+x)*t = (t + 80/60)*x

15t + xt = xt + 4x/3

15t = 4x/3

t = 4x/45 hours.

Hence,

(15 + x)*(4x/45) = 240

x(x + 15)/45 = 60

[tex](x^2 + 15x) = 60*45[/tex]

[tex](x^2 + 15x) = 2700\\x^2 + 15x -2700=0\\x^2-45x+60x-2700 = 0[/tex]

x(x-45) +60(x - 45) = 0

(x - 45)(x + 60) = 0

x = 45,-60

As the time cannot be negative,

x = 45 km/hr

t = (4*45)/45

t = 4 hours (time taken by car)

Time taken by bus = 4 hours + 80 minutes = 5 hours 20 minutes

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Answer:

7 inches

Step-by-step explanation:

π * 3^2 *7  =  197.920337

Answer:

Step-by-step explanation:

Let L and W be the length and width of a triangle.

Rectangle perimeter (Px) = 2L + 2W, where x is triangle a or b.

Rectangle A: La = 5Wa  [The length of Rectangle A is 5 inches more than its width.]

Perimeter Rectangle A:  Pa = 2La + 2Wa

Substitute L = 5Wa:  

Pa = 2La + 2Wa

Pa = 5Wa + 2Wa

Pa = 7Wa

Perimeter Rectangle B:  Pb = 17   [The perimeter of Rectangle B is 17]

Pb = 17

Difference between Pa and Pb:  Is it  < 9?

See the attached table.  The perimeters of rectangle A are computed for each of the answer options that define the width.  Length (rectangle A) is 5 inches more than the width.  The perimeter is 2*Length + 2*Width, and shown as Pa.

The perimeter of rectangle b is 17, shown as Pb on the table.  The last column of the table is the absolute value of the difference of Pa and Pb.  If it is less than 9, the cell is green (it is a possible integer value for the width of rectangle A),  Red mean it does not meet the "less than 9" requirement,  One cell has the difference as 9.  The problem states "less than 9," so it does not meet the requirement.

The value of her investment at compound interest after 4 years will be £8934.34.

What is compound interest?

Compound interest is the adding of interest to the principle sum of a loan or deposit, or interest on interest plus interest. It is the outcome of making an investment interest, or adding it to the lent assets, rather than repaying it out or requesting return from the borrower, so that interest is received on the principle sum plus previously accrued interest in the next month. In finance and economics, compound interest is the norm. Compound interest differs from simple interest in that previously accrued interest is not added to the main amount of the current month, resulting in no compounding. The simple annual interest rate is calculated by multiplying the interest amount per period by the number of periods per year.

Given,

Principal (P) = £8000

Rate of interest (r) = 2.8% compound interest p.a.

Time (n) = 4 years

Then, according to compound interest compounded annually,

Amount = P(1+r/100)ⁿ

             = 8000(1+2.8/100)⁴

             = 8000(102.8/100)⁴

             = 8934.34

Hence, the value of her investment at compound interest after 4 years will be £8934.34.

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The pencils and erasers that each student have is 14.

From the information, the person has 56 pencils and 42 erasers and wants to make sets of pencils. erasers for her class so that each student has the same number of pencils and erasers.

It should be noted that this has to do with looking for the highest common factor.

The highest common factor for 56 and 42 is 14.

The students will have 14 pencils each.

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Based on the number of movies, $12.75 is the constant of proportionality per movie

The given parameters are

Number of the movie tickets = 6

Cost of the movie tickets = 76.50

The constant of proportionality of the movie tickets is calculated as

Constant of proportionality = Cost of the movie tickets/Number of the movie tickets

Substitute the known values in the above equation

So, we have

Constant of proportionality = 76.50/6

Evaluate the quotient

So, we have

Constant of proportionality = 12.75

Hence, the constant of proportionality per movie is $12.75

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Answer:

Step-by-step explanation:

$12.75

The value of n in the right triangle is 12 cm.

The shortest side of a right angle triangle is 6cm shorter than the hypotenuse.

The difference in length of the other two sides is 3cm.

The hypotenuse side is the longest side of a right triangle.

Hence,

hypotenuse side = n - 3 + 6

hypotenuse side = n + 3

Shortest side of the right triangle = n - 3

Other side = n

Therefore, using Pythagoras theorem,

(n + 3)² = (n - 3)² + n²

(n + 3)(n + 3) = (n - 3)(n - 3) + n²

n² + 3n + 3n + 9 = n² -3n -3n + 9 + n²

n² + 6n + 9 = 2n² - 6n + 9

Therefore,

2n² - n² + 9 - 9  = 6n + 6n

n² = 12n

n² - 12n = 0

n(n - 12) = 0

n = 0 and n = 12

Therefore,

n = 12

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The value of 5y in terms of x in the equation is 5y = 15x

The equation is given as y = 3x

Therefore, we are ask to find 5y in terms of x.

This simply means we have to make 5y the subject of the formula in the equation.

In other words, we have to isolate 5y in terms of x in the equation.

Therefore,

y = 3x

multiply both sides by 5

5 ×  y = 3x × 5

5y = 15x

Therefore,

5y = 15x

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The correct equation that is balanced using the given numbers once is;

5(-1 + (-3)) = (7 * -4) + 8

There are some properties of Algebra such as;

Commutative Property of Addition or multiplication

Associative Property of Addition or multiplication

Transitive Property

Distributive Property

Now, looking at the given numbers, one good idea is to use only a positive digit outside the bracket on the left hand side of the equation to make it easy to balance on the right hand side of the equation. Thus, for the left hand side we will try;

5(-1 + (-3))

When that is solved we will get -20

Now, to balance that on the right hand side , we will have;

(7 * -4) + 8 which also equals -20

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Answer:

Step-by-step explanation:

I believe I need 2 variables to properly work this out but x=12

3=2x-21

24=2x

12=x

[tex]a(c - b) = d \\ \frac{a(c - b}{a} = \frac{d}{a} \\ c - b = \frac{d}{a} \\ c = \frac{d}{a} + b \\ c = \frac{d}{a} + \frac{b}{1} \times \frac{a}{a} \\ c = \frac{d}{a} + \frac{ab}{a} \\ c = \frac{d + ab}{a} [/tex]

THIRD OPTION IS THE ANSWER.

HOPETHIS HELPS

Answer: B) 5h³- 5h² + 4h - 4

Step-by-step explanation:

First, get rid of the parenthesis by distributing the negative sign to (3h³+5h²-3h - 7).

The expression is now 8h³ + h -11 - 3h³ - 5h² + 3h + 7

Now, combine like terms. Add terms with the same exponent. Let's start with the terms with the highest exponents.

8h³ + (- 3h³) = 5h³

                     - 5h²

h + 3h.          = 4h

-11 + 7            = -4        

Rewrite the new combined terms to get 5h³- 5h² + 4h - 4

Answer:

b) 5h³-5h²+4h-4

Step-by-step explanation:

Greetings !

look at the figure i have attached above

Hope it helps !!

The functions that are shown on the graph are:

                              f(x) = x2

                             f(x) = mx + b

     where 'm' and 'b' are real numbers.

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Answer:

a = 50

50*2=100

Step-by-step explanation:

By dividing the complex number  5 / -5[tex]i}[/tex] we get the answer as :

5 / -5[tex]i}[/tex] = [tex]i}[/tex]

Steps to simplify complex number:

Given complex number , 5 / -5[tex]i}[/tex]

multiply the numerator and denominator with conjugate [tex]-i /-i[/tex]

          = [tex]5(-i)/-5i(-i)[/tex]

by again simplifying we get ,

          = [tex]-5i/-5[/tex]

-5 common from numerator and denominator is eliminated

so we get ,

         5 / -5[tex]i}[/tex] = [tex]i[/tex]

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The solution of the system of equation is [tex]e=1 , d= 3[/tex] [tex],f=3[/tex]

The area of mathematics known as algebra is used to help express issues or circumstances into mathematical expressions. We employ integers with definite or fixed values in algebra, such as 2, 7, 0.068, etc. In addition to integers, algebra uses variables like x, y, and z.

The solution is written as below:

Given: d= f

2d + 4e - 3f = 1 --------------1

and - 3d + 2e + 4f = 5----------------------2

Put the value of f as d because it is given,

thus equation becomes; 2d+ 4e - 3d= 1 ⇒ 4e- d= 1 ----3

-3d+2e +4d= 5 ⇒  2e+ d=5 ----4

Thus on solving 3 and 4 we get;

[tex]4e-d=1\\+2e+d=5\\[/tex]

We get 6e= 6 which implies e= 1

And putting this value of e in equation 3 we get,

4X1 -d=1

-d= 1-4 ⇒ -d= -3

thus d = 3

Thus [tex]e=1 , d= 3[/tex]

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The solution of the given inequality is:

x ≥ 1.

And the graph on the number line can be seen in the image at the end.

The inequality we want to solve and graph is:

-6x + 5 ≤-1

To solve this, we need to start by isolating the variable x in one of the sides, we will get:

-6x + 5 ≤-1

-6x ≤-1 - 5

-6x ≤ -6

Now we can divide both sides by -6 to get:

x ≥ 1.

Then the graph will be like the one below. You need to have a closed dot on x = 1 (because that is a solution to the inequality) and then shade all the region to the right of x = 1, because x also can be larger than 1.

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Answer:

-2

Step-by-step explanation:

-2y^2=-2y^2

The values of the composite function are (f o g)(x) = √2x² - 8 and (f o g)(x) = 2x - 8, while their domains are x > 2 and 0 < x < oo, respectively

Lastly, the value of (g o f)(3) is -2

Composite function 1

The functions are given as

f(x) = √x

g(x) = 2x² - 8

The composite function definition is given as

(f o g)(x)

This composite function is calculated using the following composite function formula

(f o g)(x) = f(g(x))

Substitute the known values in the above equation

(f o g)(x) = √g(x)

This gives

(f o g)(x) = √2x² - 8

For the domain, we have

2x² - 8 > 0

This gives

x > 2

Composite function 2

The functions are given as

f(x) = √x

g(x) = 2x² - 8

The composite function definition is given as

(g o f)(x)

This composite function is calculated using the following composite function formula

(g o f)(x) = g(f(x))

Substitute the known values in the above equation

(g o f)(x) = 2f(x)² - 8

This gives

(g o f)(x) = 2(√x)² - 8

Evaluate

(g o f)(x) = 2x - 8

The function is a linear function

So the domain is the set of all real values

Substitute 3 for x in (g o f)(x) = 2x - 8

(g o f)(3) = 2(3) - 8

Evaluate

(g o f)(3) = -2

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Answer:

No

Step-by-step explanation:

I just graphed f(x)=x+11, f(x)=x-9, and (3,-9) in Desmos, and you can visibly see that it isn't.