MATHEMATICS MIDDLE SCHOOL

How do you solve this?

Factor.

9y-18

Answers

Answer 1
Answer: 9(y-2)
  there are several ways to solve that
9x y= 9y
9(-2)=-18
Answer 2
Answer:

Hi

9y-18

= 9(y-2)


I hope that's help !

Good night

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Two beakers plus their contents have a mass of 180.4 grams. The total mass of the contents is 56.8 grams. Write and solve an equation to the mass of one beaker.

Answers

I don't know if I am right but I think this is the answer:
If we write beaker with x and content with y
then y=56.8/2=28.4   this is the content of one beaker
so there are two beakers:
2x+28.4=180.4
2x=180.4-28.4
2x=152/2
x=76   

A triangle has angles that measure 55°, 43°, and 82°. What kind of triangle is it?A. obtuse
B. right
C. acute

Answers

Answer:

c. acute

Step-by-step explanation:

all angles are less than 90 degrees, so it is acute

Which solid figures are best for construction? Explain why

Answers

A triangle is the best because it is sturdy. There is no "wiggle room" for the triangle to transform into another shape.
A square because you can use to measure in any way you want

Evaluate. (−6+8)−2 Please help me

Answers

(-6+8)-2

The answer is 0

The ratio of girls to boys in the grade is 9 to 11. If there are 135 girls, how many boys are there?

Answers

There would be 165 boys in the grade.

I got this because I did 135/9. I got 15. Then I multiplied 11*15.

There is 165 boys. Multiply both sides by 15 to get an equal ratio

The tables represent two linear functions in a system. A 2 column table with 5 rows. The first column, x, has the entries, negative 4, negative 2, 0, 2. The second column, y, has the entries, 26, 18, 10, 2. A 2 column table with 5 rows. The first column, x, has the entries, negative 4, negative 2, 0, 2. The second column, y, has the entries, 14, 8, 2, negative 4. What is the solution to this system? (1, 0) (1, 6) (8, 26) (8, –22)

Answers

We want to solve a system of linear equations, we will get that the solution is (8, -22)

A system of equations is a group of equations that we must solve simultaneously.

Here we have two lines defined by tables:

line 1:

x      y

-4    26

-2    18

0    10

2    2

line 2:

x      y

-4    14

-2     8

0      2

2      -4

Remember that a line is written as:

y = a*x + b

Where a is the slope and b is the y-intercept.

We know that if a line passes through the points (x₁, y₁) and (x₂, y₂), then the slope can be computed as:

a = (y_2 - y_1)/(x_2 - x_1)

With this we can find the slope of the first line, using any pair of the given points, I will use (0, 10) and (2, 2)

a = (2 - 10)/(2 - 0) = -4

And we know that the line passes through (0, 10), then the y-intercept is equal to 10.

y = -4*x + 10

For line 2 we can use the points (0, 2) and (2, - 4), so we get:

a = (-4 - 2)/(2 - 0) = -3

And the y-intercept is y = 2, then the line is:

y = -3*x + 2

Now we must solve:

-4*x + 10 = -3*x + 2

10 - 2 = 4x - 3x

8 = x

Now we evaluate x = 8 in any of the two lines:

y = -3*8 + 2 = -22

Then the solution of the system is (8, -22)

If you want to learn more, you can read:

brainly.com/question/9351049

Answer:

(8,-22)

Step-by-step explanation:

i just took the test and checked
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