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juin [17]
3 years ago
12

How do you solve 7x+2y=2, x-2y=14

Mathematics
1 answer:
professor190 [17]3 years ago
7 0
First you isolate x in the equation x-2y=14 and substitute. So the equation should be x= 2y+14. You plug this equation into the x of 7x on the other problem and solve. Your final equation should now be 7(2y+14)+2y=2. Now distribute the 7 into (2y+14) to get 14y+98 +2y=2. Next, just add up the variables and solve to get 16y=-96. Divide -96 by 16 to get your final answer of y=-6.
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A carpenter wants to expand a square room. The new room will have one side 4 feet longer and the adjacent side 6 feet longer tha
gogolik [260]

Answer:

  Dimensions of original room = 12 x 12 feet.

Explanation:

 Let the size of old square room be a x a.

 New dimension = ( a+4 ) x ( a + 6 )

   We have area of the new room will be 144 square feet greater than the area of the original room.

  So,     ( a+4 ) x ( a + 6 ) = a x a + 144

              a²+10a+24= a²+144

              10a = 120

                  a = 12 feet.

 Dimensions of original room = 12 x 12 feet.

 

8 0
3 years ago
Determine the total number of roots of each polynomial function.<br><br> f (x) = (3x4 + 1)2
stiks02 [169]
Answer:

It’s not allowing me to place done the work but the answer is 8 sorry!
6 0
2 years ago
89,000 rounded to the nearest thousand
Rufina [12.5K]

89 thousands?

........................

4 0
2 years ago
Read 2 more answers
What is the solution to the equation 1/x = x+3/2x^2
dusya [7]
D. x = 3 because 3+3 is 6 and that is over 2*3^2 which is 2*9 which means it is 6/18 then you divide both the numerator and denominator by 6 and that =1/3.
4 0
3 years ago
Read 2 more answers
An animal shelter provides shelter for dogs and cats. The animal shelter currently has a total of 117 animals. If the number of
Reika [66]

Answer:

98 cats and 19 dogs

Step-by-step explanation:

cat = c

dog = d

The animal shelter currently has a total of 117 animals

c + d = 117

c = 117 - d

the number of cats is 3 more than 5 times the number of dogs

c = 3 + 5d

subtitute c

117 - d = 3 + 5d

117 - 3 = 5d + d

114 = 6d

6d = 114

d = 114/6 = 19

so, the cat is 117-19 = 98

5 0
2 years ago
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