Can someone pleasee help I’ll mark brainlist!!!

Answer:

f(-1)=-2

Step-by-step explanation:

f(x)=-3x-5x^2

f(-1)=-3(-1)-5(-1)^2

f(-1)=-3(-1)-5(1)

f(-1)=3-5

f(-1)=-2

The inverse matrix of the given matrix using Gauss-Jordan elimination method is:

[-7, 4, 0 ]

[-1, 0.5, 0 ]

[-0.5, 0.25, 0.5 ]

To find the inverse matrix using Gauss-Jordan elimination, we augment the given matrix with an identity matrix of the same size:

[1, -2, 0 | 1, 0, 0]

[2, -6, 4 | 0, 1, 0]

[0, -1, 3 | 0, 0, 1]

Next, we perform row operations to transform the left side of the augmented matrix into an identity matrix. We start by performing row operations to create zeros below the diagonal entries:

[1, -2, 0 | 1, 0, 0]

[0, 2, 4 | -2, 1, 0]

[0, -1, 3 | 0, 0, 1]

Next, we use row operations to create zeros above the diagonal entries:

[1, 0, 8 | -7, 4, 0]

[0, 1, 2 | -1, 0.5, 0]

[0, 0, 2 | -1, 0.5, 1]

At this point, the left side of the augmented matrix has been transformed into an identity matrix, while the right side has become the inverse matrix:

[1, 0, 0 | -7, 4, 0]

[0, 1, 0 | -1, 0.5, 0]

[0, 0, 1 | -0.5, 0.25, 0.5]

Therefore, the inverse matrix of the given matrix is:

[-7, 4, 0 ]

[-1, 0.5, 0 ]

[-0.5, 0.25, 0.5 ]

By performing the necessary row operations using the Gauss-Jordan elimination method, we have successfully obtained the inverse matrix. The inverse matrix is a useful tool in various mathematical operations, such as solving linear equations and computing transformations.

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Answer: a soda costs $4

Step-by-step explanation:

add totals and divied by each number

Answer: $4

Step-by-step explanation:

The number of ways can arrange the songs on the CD will be 3,628,800.

A permutation is an act of arranging items or elements in the correct order. Combinations are a way of selecting items or pieces from a group of objects or sets when the order of the components is immaterial.

Suppose Allen is going to burn a compact disk (CD) that will contain 10 songs.

Then the number of ways can arrange the songs on the CD will be given by 10 factorial.

⇒ 10!

⇒ 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1

⇒ 3,628,800

Thus, the number of ways can arrange the songs on the CD will be 3,628,800.

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Train a total of 200 miles each week. 160 miles I bike, 32 miles I run, 8 miles I swim.

What do you mean by Simultaneous linear equations?

A system of simultaneous linear equations is any pair of linear equations or more that have the same unknown variables in common. To solve such a system, one must identify values for the unknown variables that simultaneously satisfy each of the equations. A system of simultaneous linear equations is any pair or group of linear equations where each equation has the same unknown variables. Finding values for the unknown variables that simultaneously satisfy each equation in such a system is the first step in its solution.

according to the question,

you bike five times as far as I run and you run four times as far as iswim. you train a total of 200 miles each week.

let, I swim x miles then I run 4x times and I bike 20x miles.

so, 4x+x+20x=200

by solving linear equations,

we get, x=8

hence,160 miles I bike.

32 miles I run.

8 miles I swim.

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Answer: (b+5)(b-5)

Step-by-step explanation:

both b^2 and 25 are square numbers, so square root both of them to give b and 5, then put into brackets with a + and -

Answer:

1/78

Decimal form:

0.0 128205...

hope this helps!

Answer:

1 1/2 cups

Step-by-step explanation:

original amount = 2 1/4 cups = (2 × 4 + 1)/4 cups = 9/4 cups

2/3 of original amount = 2/3 × 9/4 cups = 18/12 cups = 3/2 cups = 1 1/2 cups

The inequality to determine the number of runs per inning, p Kim's team could have scored is; 4r + 6 > 17

Let r represent the number of runs per inning. Thus for 4 innings, we have 4r.

The team already has 6 runs. Now add the additional runs to this to get;

4r + 6

The team wants to score more than the other team, this means they need more than 17 and so the inequality required is;

4r + 6 > 17

Subtract 6 from each side to get;

4r + 6 - 6 > 17 - 6

4r > 11

Divide both sides by 4 to get:

r > 2.75

Approximating to a whole number gives;

r > 3

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Answer:

6+4p> 17
3

Step-by-step explanation:

The boundaries of the class 1.87-3.43 are D) 1.865-3.435. The lower boundary is 1.865 and the upper boundary is 3.435.

The boundaries of the class 1.87-3.43 can be determined by subtracting and adding half of the smallest possible unit of measurement to the given class limits. In this case, since the given class limits are 1.87 and 3.43, we need to find the boundaries by subtracting and adding half of the smallest possible unit of measurement.

Let's assume the smallest possible unit of measurement is 0.01.

To find the lower boundary:

Lower Boundary = Lower Limit - (0.01/2)

Lower Boundary = 1.87 - 0.005

Lower Boundary = 1.865

To find the upper boundary:

Upper Boundary = Upper Limit + (0.01/2)

Upper Boundary = 3.43 + 0.005

Upper Boundary = 3.435

Therefore, the boundaries of the class 1.87-3.43 are:

D) 1.865-3.435

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Answer:

Answer A is correct

Step-by-step explanation:

Formula to find the volume of a cylinder is :

Volume = π r² h

Given that,

radius ⇒ 8 units

height ⇒ 7 units

Let us find it now.

Volume =  π r² h

Volume = π × 8 × 8 × 7

Volume = π × 64 × 7

Volume = π × 448

Volume = 448 π units³

Answer:

X=20

Step-by-step explanation:

3x=2x+20

X=20

The solution to the inequality is y ≤ -8. This means that any value of y that is less than or equal to -8 will satisfy the original inequality.

To solve the inequality y + 7 ≤ -1, we need to isolate the variable y on one side of the inequality sign.

Starting with the given inequality:

y + 7 ≤ -1

We can begin by subtracting 7 from both sides of the inequality:

y + 7 - 7 ≤ -1 - 7

y ≤ -8

The solution to the inequality is y ≤ -8. This means that any value of y that is less than or equal to -8 will satisfy the original inequality.

In the context of a number line, all values to the left of -8, including -8 itself, will make the inequality true. For example, -10, -9, -8, -8.5, and any other value less than -8 will satisfy the inequality. However, any value greater than -8 will not satisfy the inequality.

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The following question may be like this:

What is a solution of the inequality shown below? y+7≤-1

The expected number of games before Paul goes broke is 7.5.

Let X be the number of games played before Paul goes broke. For each game, Peter wins with probability p = 2/3, and loses with probability 1-p = 1/3. Let Y be the amount of money won by Peter in each game. Then Y = 1 with probability p, and Y = -1 with probability 1-p. The expected value of Y is:

E(Y) = (1)(p) + (-1)(1-p) = 2p - 1 = 1/3

The expected value of X can be found using the formula:

E(X) = E(total amount won by Peter) / E(Y)

Since Peter starts with no money and Paul starts with $10, the total amount won by Peter after X games is 10 - X. Thus, we have:

E(X) = (10 - E(total amount won by Paul)) / E(Y)

The total amount won by Paul after X games is X dollars, since he bets one dollar on each game. Thus:

E(total amount won by Paul) = X

Substituting this into the previous formula, we get:

E(X) = (10 - X) / (1/3) = 30 - 3X

To find the expected value of X, we need to solve the equation E(X) = 30 - 3X for X. This gives:

4X = 30

X = 7.5

Therefore, the expected number of games before Paul goes broke is 7.5.

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The radical expressions and their corresponding expression in rational exponent form are

\(972^\frac 15 = 3\sqrt[5]{4}\), \(448^\frac 13 = 4\sqrt[3]{7}\), \(3528^\frac 12 = 42 \sqrt 2\) and \(4050^\frac 14 = 3\sqrt[4]{50}\)

We start by evaluating each expression as follows:

\(972^\frac 15\)

Expand 972

\(972^\frac 15 = (243 * 3)^\frac 15\)

Take the 5th root of 243

\(972^\frac 15 = 3* (4)^\frac 15\)

Rewrite as:

\(972^\frac 15 = 3\sqrt[5]{4}\)

Next, we have:

\(448^\frac 13\)

Expand 448

\(448^\frac 13 = (64 * 7)^\frac 13\)

Take the 3rd root of 64

\(448^\frac 13 = 4 * (7)^\frac 13\)

Rewrite as:

\(448^\frac 13 = 4\sqrt[3]{7}\)

Next, we have:

\(3528^\frac 12\)

Expand 3528

\(3528^\frac 12 = (1764 * 2)^\frac 12\)

Take the square root of 1764

\(3528^\frac 12 = 42 * (2)^\frac 12\)

Rewrite as:

\(3528^\frac 12 = 42 \sqrt 2\)

Lastly, we have:

\(4050^\frac 14\)

Expand 4050

\(4050^\frac 14 = (81 * 50)^\frac 14\)

Take the 4th root of 81

\(4050^\frac 14 = 3 (50)^\frac 14\)

Rewrite as:

\(4050^\frac 14 = 3\sqrt[4]{50}\)

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The amount of money that you will have in eight years from today is $29,315.79 (rounded to 2 decimal places).

To find out the amount of money that you will have in eight years, you need to use the future value formula, which is:FV = PV × (1 + r)n

Where, FV = future value

PV = present value (initial investment) r = annual interest rate (as a decimal) n = number of years

First, you need to find the future value of the gift amount of $17,000 in two years.

Since it's a gift and not an investment, we can assume an interest rate of 0%.

Therefore, the future value would simply be:

PV = $17,000r = 0%n = 2 years

FV = $17,000 × (1 + 0%)2FV = $17,000

Now, you will loan that amount at 9.75% interest for six more years.

So, you need to find the future value of $17,000 after 6 years at an annual interest rate of 9.75%.

PV = $17,000

r = 9.75%

n = 6 years

FV = $17,000 × (1 + 9.75%)6

FV = $29,315.79

Therefore, the amount of money that you will have in eight years from today is $29,315.79 (rounded to 2 decimal places).

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Answer: Circle, vertical axis, 5

Step-by-step explanation:

Answer:

she would need 7 ounces

Step-by-step explanation:

Answer:

48

Step-by-step explanation:

Answer:

\(y = \frac{1}{3} x - 2\)  (But I can't find it in your options)

Step-by-step explanation:

The coordinates are (0,-2) and (6,0)

Finding the slope:

=> Slope = \(\frac{rise}{run}\)

=> Slope = \(\frac{y2-y1}{x2-x1}\)

=> Slope = \(\frac{0+2}{6-0}\)

=> Slope = 2/6

=> Slope = m = 1/3

Finding the y-intercept:

y-intercept = b = -2

Because this is the point where x = 0 According to coordinate (0, -2)

So, the slope intercept equation becomes:

=> \(y = mx+b\)

=> \(y = \frac{1}{3} x - 2\)

Answer:

y = 1/3 x - 2.

Step-by-step explanation:

The slope of the line = (y2 - y1)/(x2 - x1)

= ( 0 - (-2)) / (6 - 0)

= 2/6

= 1/3.

Using the point slope form of the line  with m = 1/3 and (x1,y1) = (0,-2):

y - y1 = m(x - x1)

y - (-2) = 1/3(x - 0)

y + 2 = 1/3 x    

y = 1/3 x - 2.

Answer:

B, (-1, -7)

Step-by-step explanation:

The angle is 25 degrees

Let the measure of the angle be x

So, we have

Complement = 90 - x

Supplement = 180 - x

The sum is 220

So, we have

90 - x + 180 - x= 220

Evaluate the sum

-2x + 270 = 220

Solve for x

x = 25

Hence, the angle is 25 degrees

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Answer:

black

black

Step-by-step explanation:

Answer:greengrocer should Dell 17 kg before profit. 500$ profit

Step-by-step explanation:

Answer:

x = 11

z = 86

Step-by-step explanation:

8x + 6 and 10x-16 are vertical angles

Vertical angles are pairs of angles that are opposite each other and have the same vertex, or point of intersection. They are formed when two lines intersect at a point, and are always congruent, or of equal measure.

To solve this equation, we need to isolate the variable x on one side of the equation. To do this, we can start by subtracting 6 from both sides of the equation:

8x + 6 - 6 = 10x - 16 - 6

8x = 10x - 22

Now we can subtract 8x from both sides of the equation:

8x - 8x = 10x - 22 - 8x

0 = 2x - 22

To solve for x, we can add 22 to both sides of the equation:

0 + 22 = 2x - 22 + 22

22 = 2x

Finally, we can divide both sides of the equation by 2 to find the value of x: 22 / 2 = 2x / 2

x = 11

Therefore, the solution to the equation is x = 11.

Now that we have x, z is a supplementary angle to 8x + 6 (or you could do 10x - 16)

Supplementary angles are pairs of angles that add up to 180 degrees. They are formed when two lines intersect at a point, and the angles formed at the intersection are supplementary.

First plug in x, 8x + 6 = 8(11) + 6 = 88 + 6 = 94

180 - 94 = z

z = 86

Answer: 201

Step-by-step explanation: Ok this is very simple for those of you who are stuck on this. First you divide 12 by 268. You would get 22 with a remainder of 4. This in fractions would be 22 1/3. So he would be driving 22 1/3 miles with 1 galloon of gas. If you multiply this by 9 you would get 201 miles which is how much he can drive in 9 gallons of gas.

Hoped this helped!

A polynomial is an expression consisting of variables and coefficients and factoring is the process of breaking down a polynomial into simpler units

A polynomial is an expression consisting of variables and coefficients, which are combined using only addition, subtraction, and multiplication. For example, 3x^2 + 2x - 1 is a polynomial, where x is the variable, 3 and 2 are coefficients, and ^2 and ^1 are exponents.

Factoring is the process of breaking down a polynomial into simpler units, which can be multiplied together to obtain the original polynomial. The simplest units are usually linear expressions, which have the form ax + b, where a and b are coefficients. For example, the polynomial 3x^2 + 2x - 1 can be factored into (3x - 1)(x + 1) by identifying two linear expressions that when multiplied together produce the original polynomial.

Factoring is an important tool in algebra, as it can help to simplify expressions, solve equations, and identify the roots of a polynomial.

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Answer:

18%

Step-by-step explanation:

It is 18% because when you divide 9 by 50 you get 0.18 and when you multiply 0.18 by 100 you get 18 then just add the percentage sign

hope this helped :)

Answer:

14 hamburgers

Step-by-step explanation:

The problem uses division, but we can create a proportion to see how the division works.

Since we know that Chelsea can make 1 hamburger with 0.16 pounds and allow x to represent the number of burgers Chelsea can make with 2.24 lbs of meat, we have:

\(\frac{2.24}{x}=\frac{0.16}{1}\)

\(2.24=0.16x\)

As the proportion shows, we can divide 2.24 by 0.16 to get x = 14.

Check: 0.16 lbs * 14 patties = 2.24 lbs