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2 years ago

10

A 11 foot ladder is placed against a building. If the base of the ladder is 7 feet away from the building, how far up the buildi

ng will the ladder reach? Round the answer to the nearest tenth.

1 answer:

Sidana [21]2 years ago

3 0

Check the picture below.

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The Room is 20 feet by 25 feet and the ceiling is eight feet. What is surface area that would need to be painted in order to pai

Tanya [424]

Answer:

I'm assuming you don't want to paint the floor.

1220

Step-by-step explanation:

25 * 8 = 200. Now we multiply that by 2 to get 400. Those are the 2 walls.

The ceiling is 25 * 20 = 500.

20 * 8 = 160. Now we multiply that by 2 to get 320. Those are the 2 walls.

500 + 400 + 320 = 1220

7 0

4 years ago

Help with functions right quick? :) please

-Dominant- [34]

The answer is: [B]: -4 .
_____________________________
Here is the problem:
_____________________
"Find f(3)."
_______________________
f(x) = $\left \{ {x + 5 ; if x \ \textless \ -2 ; \atop {-4; if x \geq -2 ;}} \right.$ ;
______________________________________
Since we are asked to find: " f(3)" ; we consider the number, "3", which is GREATER THAN OR EQUAL TO "-2" ; (that is, " 3 $\geq$ -2" ;
and f(x) = -4 if x $\geq$ -2 .
_____________________________________________________
So, in this case, f(x) = f(3) = -4 ; which is: "Answer choice: [B] ".
_____________________________________________________

6 0

4 years ago

Mr. Wilkinson is building a stone path through his backyard. Each stone is 1 3 of a foot long. He wants the path to be 8 feet lo

VMariaS [17]

Answer:

24

Step-by-step explanation:

8 / 1/3

8 x 3 = 24

4 0

3 years ago

Give me an example of scale balance illustrating inequalities

Alenkinab [10]

Answer: 3x + 1 < 5 which has the same scale as x < 4/3

Step-by-step explanation:

Scale balance involves operating on each side of an equation or inequality, by adding, subtracting, multiplying, or dividing by a certain quantity, without changing the equilibrium of the equation or inequality.

The rules are easy,

* Everything you add to, subtract from, divide with, or multiply by one side of an equation or inequality must be done to the other side.

On Inequalities <, >, ≥, and ≤

* Anything you add, subtract, divide or multiply by the left hand side, the same must be done to the right hand side.

* Anytime you divide by a negative quantity, the inequality changes, and you must change the inequality sign.

Change < to > and vice versa.

Change) ≤ to ≥ and vice versa.

Example

Consider the following inequality.

3x + 1 < 5

subtract 1 from both sides of the inequality

3x + 1 - 1 < 5 - 1

3x < 4

Divide both sides of the inequality by 3

3x/3 < 4/3

x < 4/3

Here is another example.

Consider the following inequality

2y + 1 ≤ 5y + 9

Subtract 1 from both sides

2y + 1 - 1 ≤ 5y + 9 - 1

2y ≤ 5y + 8

Subtract 5y from both sides

2y - 5y ≤ 5y + 8 - 5y

-3y ≤ 8

Divide both sides by -3, but remember, DIVIDING BY A NEGATIVE QUANTITY CHANGES THE INEQUALITY .

-3y/-3 ≥ 8/(-3)

y ≥ -8/3 or -2⅔

I hope this helps, good luck.

7 0

3 years ago

4x(3x-7)-19x^2 simplify the expression below

LuckyWell [14K]

Answer:

opening the bracket, the expression becomes

12x^2-28-19x^2

collect like terms

12x2-19x^2-28

-7x^2-28

-7(x^2+4)

8 0

4 years ago