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3 years ago

A stack of 4 bricks is 6 feet high how high is a stack of 20 bricks

1 answer:

5 0

Hello there!

We first would have to determine how many feet are in each brick of the 4 bricks.

(6/4)= 1.5

There are 1.5 for ever brick.

Now that we know this, we do 1.5 by how many bricks we would want to multiply by, which in this case is 20.

(1.5x20) = 30 ft.

Your correct answer would be . . . 30 ft tall.

I hope this helps you!

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<img src="https://tex.z-dn.net/?f=x%20%2B%20y%20%3D%209%20%2B%202x%20-%203y%20%3D%208" id="TexFormula1" title="x + y = 9 + 2x -

Vadim26 [7]

Answer:

(7,2)

Step-by-step explanation:

x + y = 9 + 2x - 3y = 8 is really two equations, and you should show this by separating x + y = 9 from 2x - 3y = 8 through the use of a comma, or the word "and," or through writing only one equation per line.

Here you have the system of linear equations

x + y = 9

2x - 3y = 8.

Let's solve this system by elimination. Mult. the 1st eqn by 3, obtaining the system

3x + 3y = 27

2x - 3y = 8

-------------------

5x = 35, so that x = 7. Subbing 7 for x in x + y = 9, we get 7 + y = 9, indicating that y = 2.

Thus, the solution to this system of equations is (7,2).

6 0

3 years ago

What is the product? (3a^2b^4) (-8ab^3)

sladkih [1.3K]

Answer:

-24a^3b^7

Step-by-step explanation:

(3a^2b^4)(-8ab^3) Original equation

-24a^3b^7 You have to multiply the coefficients, but because of

the power rule, you have to add the exponents with each other.

Hope this helps!

8 0

3 years ago

Read 2 more answers

Find the value of x, rounded to the nearest tenth

Lemur [1.5K]

Answer:

90+35+x=180

×=180-90+35

×=180-125

×=55

6 0

3 years ago

Read 2 more answers

the larger of two number is nine more than four times the smaller number. the sum of the two numbers is fifty-nine. find the two

VLD [36.1K]

This is solved by setting up two equations and then using one to answer the other.
The first step (use what is given to set up the two separate equations)
We are looking for two numbers, let us call them X and Y.
We are told that X + Y = 59
We are also told that (9 more than) 9+ (4times the smaller number) 4Y is the bigger number X
Then we combine that into 9+4Y=X
so we now have two separate equations and we can use one to solve the other. Everywhere we have X in the first equation, we will fill in with the second equation
(9+4Y) +Y = 59 [then combine like terms]
9+5Y=59 [subtract 9 from both sides]
5Y=50 [divide both sides by 5 to isolate the Y]
Y=10 [now plug this into either equation to solve for X]
9+4(10)=X
9+40=X
49=X and 10=Y

4 0

3 years ago

A group of tenth grade students responded to a survey that was asked which Math course they were currently enrolled in. The surv

ale4655 [162]

Answer:

Step-by-step explanation:

The bottom-right most cell tells us that the total number of students that responded to the survey is 310 students.

To find the answer, we can go through each choice.

A. Females taking Geometry

Row 1 Column 2 tells us that 53 females are taking geometry. 53/310 is about 17%.

B. Females taking Algebra II.

Row 1 Colume 3 tells us that 62 females are taking Algebra II. 62/310 is 20%.

C. Males taking Geometry.

Row 2 Colume 2 tells us that 59 males are taking Geometry. 59/310 is about 19%. Choice C is correct.

D. Males taking Algebra I.

44 out of the total 310 respondents are male and is taking Algebra I. 44/310 is about 14%.

4 0

3 years ago