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solniwko [45]
3 years ago
14

Simplify (8x^2 - 1 + 2x^3) - (7x^3 - 3x^2 + 1).

Mathematics
1 answer:
Elenna [48]3 years ago
7 0

Answer:

31x^2-2 is the answer....

Step-by-step explanation:

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olga_2 [115]

Answer:i believe it is the first answer

Step-by-step explanation:

4 0
3 years ago
a woman buys a plot of land of area 0.36hectares she pays $8.50 per square meter for the land what is it's total cost​
Elena L [17]

Answer:

$30,600

Step-by-step explanation:

1 hectare = 10,000 m^2

0.36 hectare = 0.36 * 10000 m^2 = 3600 m^2

She pays $8.50 per square meter. Thus, the total cost is:

3600 * 8.50 = \$30,600

Answer: $30,600

3 0
3 years ago
Simplify: -7 • 12<br><br>Giving brainliest^^<br><br>A) -84<br><br>B) -74<br><br>C) 74<br><br>D) 84
riadik2000 [5.3K]
The answer should be A) -84
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3 years ago
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8 7/8 divided by 2 1/2 feet
svetlana [45]
71/20 or 3.55 as a decimal
7 0
2 years ago
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George wants to buy pets for each of his 5 grandchildren if he buys 3 pooples and 2 cats he will spend 1200 if he buys 2 poodles
Gre4nikov [31]

Answer:

Each poodle = $300

Each Cat = $150

Step-by-step explanation:

Let number of poodles be P and number of cats be C

"if he buys 3 pooples and 2 cats he will spend 1200" mathematically:

3P + 2C = 1200-------eq 1

"2 poodles and 3 cats he will spend 1050" mathematically:

2P + 3C = 1050 ------eq 2

So now we have a system of 2 equations with 2 unknowns, we'll solve by elimination

eq 1 x 3 : 3 (3P + 2C) = 3  (1200)

9P + 6C = 3600 ------ eq 3

eq 2 x 2: 2(2P + 3C) = 2(1050)

4P + 6C = 2100---------eq 4

By elimination : eq 3 - eq 4

(9P + 6C) - (4P + 6C) = 3600 - 2100

9P - 4P = 1500

5P = 1500

P = 300  (answer)

Substituting back into eq 1

3(300) + 2C = 1200

900 + 2C = 1200

2C = 1200 - 900

2C = 300

C = 150(answer)

8 0
3 years ago
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