i need help with 8, 9, and 11

Answer:

B

Step-by-step explanation:

Answer:

x = -3

Step-by-step explanation:

7 + 2x/3 = 5

7*3 + 2x = 5*3 ( we multiply by 3 to remove the denominator )

21 + 2x = 15

2x = 15 - 21

2x = -6

x = -6/2

x = -3

Answer:

X=4

Step-by-step explanation:

Times both side by 3

then you get 7+2x=15

then minus 7 from both sides

2x=8

divide by 2

x=4

Answer: -32

Step-by-step explanation:

I'm just going to plug in and break down the equation to make it more understandable and easier to comprehend

-(3^2) - (4*3) -11

-(9)- (12) -11

-9 - 12 - 11

-21 -11

-32

Using the cramer method, we can find the value of the variables to be:

To be able to find the values using the cramer method, we first need to find the values known as determinants of the coefficient matrix:

Determinant D :

D = 1 (- 1 - 0) - 1 (1 - 0) + 1(0 - 0)

= -1 - 1

= -2

Determinant Dx:

= 4(-1 - 0) - 1(-3 - 0) + 1(0 - 0)

= -4 + 1 = -3

Determinant Dy:

= 1(-3 - 0) - 4(1 - 0) + 1(1 - 0)

= -3 - 4 + 1

= -6

Determinant Dz:

= 1(-1 + 3) - 1(0 - 0) + 4(0 - 0)

= 2

Using these, we can find the values to be:

x :

= Dx / D

= -3 / -2

= 1.5

y:

= Dy / D

= -6 / -2

= 3

z:

= Dz / D

= 2 / -2

= -1

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Full question is:

what is using cramer method x+y+z=4 x-y=-3 z = 1

1. The domain of \(V (h(r))\) is restricted to values of r greater than 0.

2. \(V(h(r)) = 3.5\pi r^3\)

3. The volume depends on the radius of the cylinder

Answer:

Lyndsay charges a better deal

Step-by-step explanation:

With Lyndsay charging $100 for 4 hours you get $20 off because 4 hours with Margaret charges $120.

Answer:

Margaret

Step-by-step explanation: Lyndsay charges 25 dollars an hour for tutoring while Margaret only charges 20 dollars an hour for tutoring. Therefore, Margaret has a WAY better deal, Lyndsay charges 5 more dollars then Margaret.

60 divided by 2: 20

100 divided b 4: 25.

              {~} Izzy ∩﹏∩ {~}

Answer:

Step-by-step explanation:

To get the y values all you need to do is substitute the x value in the equation y=-2/3x+7.

For example:

y=-2/3(-6)=7

-2/3x6=-4

-4+7=3

(-6,3)

You can double check your work by filling the x and y coordinates in the equation and when solved if it it true you know you were correct.

To get the x value, you need to fill in the y in the equation y=-2/3x+7

for example:

5=-2/3x+7

-2=-2/3x

3=x

(3,5)

y=-2/3x+7

y=-2/3(15)+7

y=-10+7

y=-3

(15,-3)

y=-2/3x+7

15=-2/3x+7

8=-2/3x

-12=x

(-12,15)

Answer:

6in 5in

you have to do 5×2 and 6×2 and add those together

Answer:

The 6 by 5 rectangle

Step-by-step explanation:

It is the 6 by 5 rectangle because the text says she used 22 inches to border the cover. this means we need to look at the rectangles perimeters to find the answer. to find the perimeter of  rectangles that only give you measurements for two sides you need to multiply each measurement by 2. So you need to do 6 times 2 and 5 times 2 to get 12 and 10. once you have your two numbers you add them together. 12+10=22. (remember we were looking for a recangle with a perimeter of 22 inches)

I hope this helps you out a little.

Answer:

(k-10h) (k+10h)

Step-by-step explanation:

k^2 - 100h^2

Rewriting as

k^2 - (10h)^2

We recognize this as the difference of squares

We know the difference of squares is factored as a^2 -b^2 = (a-b)(a+b)

(k-10h) (k+10h)

Answer:

(k-10h) (k+10h)

Step-by-step explanation:

Answer:

Volume of the prism =area of base*height

=[3*3+3*6]*9

=243 cm³

Alternate

Volume of prism : l*b*h+l*b*h=3*3*9+3*6*9=243cm³

The growth rate of the population, given the initial population and the population after 10 years is 12. 5 % every 10 years.

To find the percent change or growth rate of a quantity between two different values, you can use the formula:

Percent change = ( new value - old value ) / old value x 100%

The new value would be the population of the village after 10 years which is 450 people.

The old value is the initial population of the village which is 400

The growth rate of the population is:
= ( 450 - 400 ) / 400 x 100 %

= 12. 5 %

The growth rate for the village is therefore 12. 5 % every ten years.

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Answer:

1 4/5 of a necklace, or 1.8 necklaces.

Step-by-step explanation:

As we know, an hour has 60 minutes, and Janet can make 3/5 of a necklace in 20 minutes. 60/20 is 3. So we need to mulitply 3/5 by 3 to get the amount of necklaces she can make in an hour. When we do this, we get 9/5. We can convert this to 1 4/5, and as decimal form, this is 1.8. That is our answer. I hope this helps!

Answer:

D) y = 12

Step-by-step explanation:

One can use the angle bisector theorem to solve this problem. The angle bisector theorem states:

\(\frac{a_1}{b}=\frac{a_2}{c}\)

Where (\(a_1\)) and (\(a_2\)) are a part of the side that is intersected by the angle bisector and (\(b\)) and (\(c\)) are the other two sides in the triangle. Substitute in the given values and solve for the unknown.

\(\frac{4}{8}=\frac{6}{y}\)

Simplify,

\(\frac{1}{2}=\frac{6}{y}\)

Cross products,

\(12=y\)

Answer:

The variance for the number of correct answers is 4.5.

Step-by-step explanation:

For each question, there are only two possible outcomes. Either the correct answer is guessed, or it is not. Questions are independent of each other, so we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The variance of the binomial distribution is:

\(V(X) = np(1-p)\)

24 questions

This means that \(n = 24\)

Each question has four possible answers one of which is correct

This means that \(p = \frac{1}{4} = 0.25\)

Find the variance for the number of correct answers

\(V(X) = np(1-p) = 24*0.25*0.75 = 4.5\)

The variance for the number of correct answers is 4.5.

Answer:

15°

Step-by-step explanation:

2x+5=3x

5=3x-2x

5=x

Now we can solve the angle.

<BAD=2x+5 = 2(5)+5 = 10+5 = 15°

The probability of taking math or science or both is 123/152

The total number of students = 152 students

Number of students who take math = 100 students

Number of student who take science = 77 students

Number of students who take both math and science = 55 students

The probability = Number of favorable outcomes /  Total number of outcomes

We have to find each term

The number of favorable outcomes =55+45+23

= 123

Total number of outcomes = 152

Substitute the values in the equation

​Probability of taking math or science or​ both = 123/152

Hence, the probability of taking math or science or both is 123/152

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Answer:

last graph

Step-by-step explanation:

Answer:

Step-by-step explanation:

Given: A line passes through the points (2,4) and (5,6).

* Case 1:

If a line passes through the points (2, 4) and (5, 6)

Point slope intercept form:

for any two points  and

then the general form  for linear equations where m is the slope given by:

First calculate slope for the points (2, 4) and (5, 6);

then, by point slope intercept form;

* Case 2:

If a line passes through the points (5, 6) and (2, 4)

First calculate slope for the points (5, 6) and (2, 4);

then, by point slope intercept form;

Yes, the only equation of line from the given options  which describes the given line are;

 and

The number of years of employment is A. Nikhil has been with the company for 16 years, while Mae has been there for 4 years.

The system of equations given is:

x = 4y

x = 8 + 2y

You can solve the system by setting the two expressions for x equal to each other:

4y = 8 + 2y

2y = 8

2y / 2 = 8 / 2

y = 4

Substitute y = 4 into the first equation to solve for x:

x = 4 x 4

= 16

So, Mae (y) has been at the company for 4 years and Nikhil (x) has been at the company for 16 years.

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Answer:

110

Step-by-step explanation:

nth term = 3n + 2

3 (36) + 2

108 + 2 = 110

Answer:

The 36th term in the sequence is 104.

Here's how to find it:

- Start with the first number in the sequence: 5.

- Add the common difference, which is 3, to get the second number in the sequence: 8.

- Add the common difference to the second number to get the third number: 11.

- Continue adding the common difference to each subsequent number to find the next term in the sequence.

- The 36th term is three less than 37 times the common difference added to the first term.

- Using that formula, we can calculate the 36th term as: 5 + (36 - 1) * 3 = 5 + 105 = 110.

- Therefore, the 36th term in the sequence is 104.

The digital construction tool that would help determine wherer point C or point D is the midpoint of segment AB would be a Perpendicular Bisector. [Option B]

Since a bisector would divide the segment in two identical parts and the perpendicular line would mark the exact point in which the segment is being divided.

Answer:

First make sure the both weights have the same units.

Take your experimental yield and divide it by the theoretical yield.

Multiply this value by 100 to find the percent yield.

Answer:

The answer is 9n+22> -29.

Answer:

Every decimal number can be represented as a rational number.

Answer: Every decimal number can be represented as a rational number.!!!! Hope these helped

Step-by-step explanation:

Answer:

C.

Step-by-step explanation:

A. 39 = 3 × 13; not prime

B. 33 = 3 × 11; not prime

C. 43 = 1 × 43; prime

D. 51 = 3 × 17; not prime

Answer: C.

Answer:

Therefore, the correct statements are A, B, and E.

Explanation:

Based on my knowledge, a vector is a quantity that has both magnitude and direction. A scalar is a quantity that has only magnitude. When a vector is multiplied by a scalar, the magnitude of the vector is multiplied by the absolute value of the scalar, and the direction of the vector is either preserved or reversed depending on the sign of the scalar.

To answer your question, we need to find the component form, magnitude, and direction of the scalar product –4⇀

.

- The component form of −4⇀

is obtained by multiplying each component of ⇀

by –4. Therefore, −4⇀

= ⟨–8, –12⟩. This means that statement A is true.

- The magnitude of −4⇀

is obtained by multiplying the magnitude of ⇀

by 4. The magnitude of ⇀

is √(2^2 + 3^2) = √13. Therefore, the magnitude of −4⇀

is 4√13. This means that statement B is true.

- The direction of −4⇀

is opposite to the direction of ⇀

because the scalar –4 is negative. This means that statement C is false.

- The vector −4⇀

is in the third quadrant because its components are both negative. This means that statement D is false.

- The direction of −4⇀

is 180° greater than the inverse tangent of its components because it is opposite to ⇀

. The inverse tangent of its components is tan^(-1)(–12/–8) = tan^(-1)(3/2). Therefore, the direction of −4⇀

is 180° + tan^(-1)(3/2). This means that statement E is true.

Therefore, the correct statements are A, B, and E.

Answer:

x+y=10

x+y=10-3

x+y=7

xy²=7

answer 7

hope that helps

Step-by-step explanation:

Brainliest?

Answer:

\(w^{22}\)

Step-by-step explanation:

\((w^3)^4\cdot(w^5)^2=w^{3*4}\cdot w^{5*2}=w^{12}\cdot w^{10}=w^{12+10}=w^{22}\)