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klio [65]
2 years ago
12

15 POINTS PLEASE HELP!!!

Mathematics
2 answers:
Elan Coil [88]2 years ago
6 0

Answer:

S

Step-by-step explanation:

mote1985 [20]2 years ago
6 0

Answer: # 2

Step-by-step explanation:

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The two rectangles shown have equal areas. Find the value of x
Tema [17]

Answer:

x=18

Step-by-step explanation:

We need to find the areas of the rectangles

1st rectangle

A= l*w

A = (2x+4)*9

   = 18x+36



2nd rectangle

A = l*w

   = 15*(3x-30)

    = 45x-450


Since the area of the rectangles are equal, we set these two equations equal

18x+36 = 45x-450

Subtract 18x from each side

18x-18x+36 = 45x-18x-450

36 = 27x-450

Add 450 to each side

36+450 =27x

486 = 27x

Divide by 27 on each side

486/27 = 27x/27

18=x


7 0
3 years ago
What is the x-coordinate of the soultion y=x+2 y=-x+6
Kay [80]
<span>x+2 = -x+6
</span>2x+2 = 6
2x = 4
x = 2
6 0
3 years ago
Read 2 more answers
They estimate that their current (older) fridge, which they got for free, costs them about $17 a month in electricity charges to
Eddi Din [679]

Step-by-step explanation:

Step one:

given

current (older) fridge

electricity charges= $17 monthly

maintenance costs= $220

let the number of months be x

and the total cost be yo

the expression for the cost for the old fridge is

yo=220+17x---------1

New  fridge

electricity charges= $6 monthly

costs=  $1,050

let the number of months be x

and the total cost be yn

the expression for the cost for the old fridge is

yn= 1050+6x---------2

Hence the system of equation for the situation is

yo=220+17x---------1

yn= 1050+6x---------2

Step two

for 10 years there are 12*10= 120 months

put x= 120 in both expressions and compare the total

yo=220+17(120)---------1

yo=220+2040

yo=$2,260

yn= 1050+6(120)---------2

yn=1050+720

yn=$1770

<u><em>Based on the analysis it will be less expensive to get the new fridge, hence buying the new fridge is worth it.</em></u>

3 0
3 years ago
Can someone PLEASE PLEASE HELP!!! I will mark brainliest!
Tcecarenko [31]
Its 2 i guess but im not sure
7 0
3 years ago
Read 2 more answers
Which best describes the triangle or triangles, if any, that can be formed with the sides measuring 60 centimeters, 100 centimet
Elis [28]
No triangle 60+40=100 which is the same as one side
6 0
3 years ago
Read 2 more answers
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