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Talja [164]
3 years ago
13

Simplify the expression: 3x2 - x + 7 + 5x + 2 - 2x2

Mathematics
2 answers:
tia_tia [17]3 years ago
6 0

Answer: yes

Step-by-step explanation:

3 x 2 - x + 7 + 5 x + 2 - 2 x 2

6 - x + 7 + 5x + 2 - 4

6 + 7 + 2 - 4 - x + 5x

13 - 2 + 4x

11 + 4x

alex41 [277]3 years ago
5 0
-x+5x + (3x2) + 7 +2 - (2x2)
4x + 6 + 7+ 2 - 4
4x + 11
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ANEK [815]

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2x+4(0)=0

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substitute y with 0

4x+8(0)=7

solve the equation

4x+0=7

4x=7

divide by 4 on both sides

x=7/4 or x=1 3/4 or x=1.75

3x-7y=-29

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solve the bottom equation

3x-7y=-29

x=3-y

substitute for x

3(3-y)-7y=-29

solve the equation

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now substitute for y

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the possible solution of the system is the ordered pair

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3 0
3 years ago
at a sport banquett 8 guests are seated at each of the 15 tables how many guests (x) are seated at the table
Novosadov [1.4K]

Answer:

120

Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
If you travel 40 miles at 45 miles per hour, how many minutes will that take you?
GenaCL600 [577]
Ok so im not good with words and math, but i am going to try my best to explain it. first you will take 45/60 which is the 45 miles per hour. next you will put it equal to 40/x. x is how many minutes. they are set equal to each other because they are the same ratio. (i honestly dont know why you cross multiply, but you just do). you then multiply 40*60 and 45*x. this gives you 2400=45x. you then divide both sides by 45 and get 53 1/3 minutes. or 53 minutes and 20 seconds

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A computer online service charges one hourly rate for regular use but a higher hourly rate for designated "premium" areas. One c
N76 [4]

Answer: the service charge per hour for premium services is $5.5

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2x + 9y = 38- - - - - - - - - - - 1

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8 0
3 years ago
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