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Igoryamba
3 years ago
14

Find the value of x. PLEASE HELP!!!

Mathematics
1 answer:
Jobisdone [24]3 years ago
6 0

180/3=60

Now lets find out what x is the get 5x+10 to equal 60.

Just looking at it, its D.....x=10

5(10)+10

50+10=60

-Steel jelly

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The area of a room is 600 square feet. The length is (x + 5) feet and the width is (x + 4) feet. Find the dimensions of the room
tangare [24]
I'm going to assume that the room is a rectangle.

The area of a rectangle is A = lw, where l=length of the rectangle and w=width of the rectangle. 

You're given that the length, l = (x+5)ft and the width, w = (x+4)ft. You're also told that the area, A = 600 sq. ft. Plug these values into the equation for the area of a rectangle and FOIL to multiply the two factors:
A = lw\\
600 = (x+5)(x+4)\\
600 =  x^{2} + 9x + 20


Now subtract 600 from both sides to get a quadratic equation that's equal to zero. That way you can factor the quadratic to find the roots/solutions of your equation. One of the solutions is the value of x that you would use to find the dimensions of the room:
600 = x^{2} + 9x + 20\\
x^{2} + 9x - 580 = 0\\
(x + 29)(x - 20) = 0\\
x + 29 = 0, \:\: x - 20 = 0\\
x = -29, x = 20

Now you know that x could be -29 or 20. For dimensions, the value of x must give you a positive value for length and width. That means x can only be 20. Plugging x=20 into your equations for the length and width, you get:
Length = x + 5 = 20 + 5 = 25 ft.
Width = x + 4 = 20 + 4 = 24 ft.

The dimensions of your room are 25ft (length) by 24ft (width).
8 0
3 years ago
Read 2 more answers
If you can do all three questions I’ll mark you brainlest!! Thanks <3
Verdich [7]

Answer:

1. Rate needed 9/6; Unit rate is 1.5/1; 1.5 cans of white paint are needed for each can of blue.

2. rate needed = 12/6; unit rate = 2/1;  Need 2 cups of water for every scoop of fruit mix.

3. 70 minutes

Step-by-step explanation:

1.  Set up a ratio

3white/2blue = xwhite/6blue

3/2 = x/6

cross multiply 2x = 18; x = 9

rate needed = 9/6

Unit rate is 1.5/1 (divide 3 by 2 or 9 by 6 to get unit rate_

2. 3/1.5 = x/6

1.5x = 18; x = 12

rate needed = 12/6

unit rate = 2/1

3. Set up a ratio.

3.5/.25 ( 1/4=.25)

3.5/.25 = x/5

.25x = 3.5(5)

.25x = 17.5

x = 70 minutes

5 0
2 years ago
Read 2 more answers
Can someone please help me with this . will give brainliest :)​
Rasek [7]

Answer:

Your answer is going to be letter D because:

.00004 x 2,000,000,000 = 80,000

<u>D</u>

can i get brainly?

6 0
3 years ago
What graph is p less than or equal to -1
Montano1993 [528]
Dont know,not sure of this one
3 0
3 years ago
Imagine each letter of the world ,, Mathematical " is written on invidual piecies of paper and placed in a bag. Should you pick
Minchanka [31]

Answer:

5/12

Step-by-step explanation:

count the vowels: mAthEmAtIcAl --> a,e,a,i,a: 5

count the letters: 12

-->probability 5/12

8 0
3 years ago
Read 2 more answers
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