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nikdorinn [45]
3 years ago
15

Simplify the expression (9x² – 8z³) -(5z - 9z³ + 2z²)​

Mathematics
1 answer:
Anni [7]3 years ago
5 0

Answer:

z^3+9x^2−2z^2−5z

Step-by-step explanation:

hope this helps!

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Help pls this is really confusing
Ipatiy [6.2K]

Step-by-step explanation:

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7 0
3 years ago
Evaluate (c − b)2 + a2  for a = –5, b = –2, and c = –4.
frosja888 [35]

Answer:

29

Step-by-step explanation:

(c − b)^2 + a^2

Let a = –5, b = –2, and c = –4.

(-4--2)^2 + (-5)^2

(-4+2)^2 + (-5)^2

(-2)^2+ (-5)^2

4 +25

29

7 0
3 years ago
A local television station for a city with a population of 500,000 recently conducted a poll where they invited viewers to call
Scilla [17]

Answer:

b. Invalid, because the sample may not be representative of the population.

Step-by-step explanation:

A sample of around 10% of the population is needed to be representative.

In this question:

We have a population of 500,000, and a sample of 10,000.

10,000/500,000 = 1/50 = 0.02 = 2% of the population, so not representative, and option b is correct.

8 0
2 years ago
A 16 oz bottle of fruit punch costs $2.40. A 24 oz. bottle of fruit punch costs $3.84. Which size costs less per ounce?
mart [117]
The 16 oz bottle costs less. One cent less, to be exact. I came up with this by dividing the total cost (2.40) by the size of the bottle (16). I came up with .15. I did the same with the other cost and size, coming up with .16.
6 0
3 years ago
Divide. Write your answer in simplest form. 1/9 divided 5/4?
timofeeve [1]

Answer: 4/45

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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