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Kruka [31]
3 years ago
10

Help me pls it’s so hard

Mathematics
1 answer:
AVprozaik [17]3 years ago
3 0

Part 1: Set up 2 ratios and solve to find the actual size of the room.

1. Find the actual width of the room.

The problem states that floor plan has a ratio of 50 to 1. We can write this this as 50 / 1 and set it equal to an other ratio: x / 2.4 (2 2/5 as a decimal), where x is the actual width of the room. It should look like this:

50           x

-----   =   -----

 1           2.4

To solve, start by cross multiplying.

(50)(2.4) = (1)(x)

120 = x

x = 120

The actual width of the room is equal to 120 ft.

2. Find the actual length of the room.

50           x

-----   =   -----

 1             3

To solve, start by cross multiplying.

(50)(3) = (1)(x)

150 = x

x = 150

The actual length of the room is 150 ft.

Part 2: Find the area of the room.

a = (l)(w); a = area, l = length, w = width

a = (150)(120)

a = 18,000 ft^2

Part 3: Find the cost of covering the whole floor with wood flooring.

$7.99 per square foot

18, 000 total square feet

(18, 000)(7.99) = 143, 820

Covering the entire living room floor with wood will cost $143, 820.00.

Part 4: State your answer.

No, Lucia will not be able to cover the whole living room floor with wood for under $1000.00.

**I'm not 100% sure this is correct, but I'm like...95% sure. I'm sorry if it's wrong, but I really hope it's not!**

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3x +12 =90 what is x
castortr0y [4]

Answer:

x=26

Step-by-step explanation:

3x +12 =90

subtract 12 from each side

3x=78

divide 3 from each side

x=26

3 0
3 years ago
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Which expression is equivalent to (7x+9y)2
Arada [10]

Answer:

49x^2+126xy+81y^2

Step-by-step explanation:

Use the square of a binomial theorem

(a+b)^2= a^2+2ab+b^2

Now expand the given equation:

(7x+9y)^2=49x^2+126xy+81y^2

Hope this helps :)

Have a great day!

6 0
3 years ago
At one​ store, Julia saved ​$10 with a coupon for 40​% off her total purchase. At another​ store, the ​$29 she spent on books is
barxatty [35]
Let "a" and "b" represent the values of the first and second purchases, respectively.
  0.40*(original price of "a") = $10
  (original price of "a") = $10/0.40 = $25.00 . . . . divide by 0.40 and evaluate
  a = (original price of "a") - $10 . . . . . . Julia paid the price after the discount
  a = $25.00 -10.00 = $15.00

At the other store,
  $29 = 0.58b
  $29/0.58 = b = $50 . . . . . . . divide by the coefficient of b and evaluate

Then Julia's total spending is
  a + b = $15.00 +50.00 = $65.00

Julia spent $65 in all at the two stores.
6 0
3 years ago
Show that (n+3)2 - (n-3)2 is an even number for all positive interger values of n
Zolol [24]
(n+3)^2-(n-3)^2=\\
n^2+6n+9-(n^2-6n+9)=\\
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3 years ago
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I need help with this geometry question, matching the right ones to each other.
8090 [49]

The transformations and their respective descriptions are:

A. (x, y) ⇒ (3x, y) implies horizontal stretch by a scale factor of 3

B. (x, y) ⇒ (x+3, y) implies translation 3 units right

C. (x, y) ⇒ (x, 3y) implies vertical stretch by a factor of 3

D. (x, y) ⇒ (x, y+3) implies  implies translation 3 units up

E. (x, y) ⇒ (3x, 3y) implies dilation with a scale factor 3

<h3>What is Translation?</h3>

Translation is an algebraic transformation of a shape by moving the vertices some units along the x or y axis.

When a shape is translated it may move to a new position depending on the orientation of the translation.

Analysis:

For A, the x coordinate was transformed three times its initial value stretching it horizontally.

For B, the x coordinate moved 3 units further away from its initial value making the new value x+3 and y remaining the same.

For C, the y coordinated was transformed to a value three times what it was, making it to be stretched vertically, since the y-axis is a vertical axis.

For D, the y coordinate was moves 3 units away from its initial position making it to be translated up, since 3 is positive.

For E, both coordinates were stretched 3 units as much as their original value making the shape to dilate.

Learn more about linear transformations: brainly.com/question/13005179

#SPJ1

3 0
2 years ago
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