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stira [4]
3 years ago
14

How are the following three expressions different from each other, if indeed they are? do not just state the value of each but e

xplain what may be the same or different. Be as specific as you can be in your response.
1.(-2)^2
2.-2^2
3. -(2)^2
Mathematics
1 answer:
Lisa [10]3 years ago
8 0

Answer:

Below.

Step-by-step explanation:

Number is different to the other 2. Its value is +4 because negative 2 squared = + 4.

The other 2 have negative values and -2 = -(2) so they have the same value, -4.

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A local gym offers a trial membership for 3 months. It discounts the regular monthly fee x by $25. If the total cost of the tria
kati45 [8]
3(x - 25) < $100.  We're not req'd to solve this.


8 0
3 years ago
During a birthday party, 1/4 drank fanta orange, 1/3 took coca cola 1/5 of the remainder drank sprite and the rest took krest wh
Licemer1 [7]

Answer:

1/12

Step-by-step explanation:

Since 1/4 drank fanta orange and 1/3 took coca cola, the. remainder will be:

= 1 - (1/4 + 1/3)

= 1 - 7/12

= 5/12

Therefore, 1/5 of the remainder drank sprite, the fraction that drank sprite will be:

= 1/5 × 5/12

= 1/12

3 0
2 years ago
An electrical power company is looking to expand into a new market. Before they commit to supplying the new area with electricit
TiliK225 [7]

Answer:

atleast 385

Step-by-step explanation:

Given that an electrical power company is looking to expand into a new market. Before they commit to supplying the new area with electricity, they would like know the mean daily power usage for homes there.

Population std deviation = \sigma = 50

Sample size =n

STd error of sample mean = \frac{50}{\sqrt{n} }

Margin of error for 95% would be Critical value ( std error)

Here since population std dev is known we can use Z critical value= 1.96

1.96*\frac{50}{\sqrt{n} }19.6^2\\n>384.16

Sample size should be atleast 385

5 0
4 years ago
0825 ®
balu736 [363]

Answer:

if n(a)=4

if n(b)=3

then n(c)= 2

5 0
3 years ago
Factor the common factor out of the expression 8+20a+18a^2
ruslelena [56]
First let's rewrite it...

18a^2 + 20a + 8

Factor out a 2

2 (9a^2 + 10a + 4)
5 0
3 years ago
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