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nataly862011 [7]
3 years ago
7

I NEED HELP PLEASE ...ASAP!!!!!

Mathematics
1 answer:
attashe74 [19]3 years ago
5 0

-a²-3b³+c²+2b³-c²

= -(3)² - (3×2)³ + (-3)² + (2 × 2)³ - ( -3)²

= 9 - 24 + 9 + 16 - 9

= 1

answer is 1.


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Please help...
Dmitrij [34]
Hey there!

First solve 2 x 4 . . .

2 x 4 = 8
This means each side of the shape is 8 inches.

To find area, multiply the two sides . . .

8 x 8 = 64 <---------

The area of the shape is 64 inches.

Hope this helps you.
Have a great day!
3 0
3 years ago
Read 2 more answers
If the confidence level is increased from 90% to 99% for an SRS of size n , the width of the confidence interval for the mean μ
katrin2010 [14]

Answer:

If the confidence level is increased from 90% to 99% for an SRS of size n , the width of the confidence interval for the mean μ will <u>increase</u>.

Step-by-step explanation:

We have been given an incomplete statement. We are supposed to complete the given statement.

If the confidence level is increased from 90% to 99% for an SRS of size n , the width of the confidence interval for the mean μ will:

We know that when confidence level decreases from a value to a lower value, then the confidence interval for the mean decreases.

When confidence level increases from a value to a higher value, then the confidence interval for the mean increases.

When we will increase the confidence level from 90% to 99%, the width of the confidence interval for the mean will also increase, so it will become wider.

Therefore, the correct word for our given statement is increase.

6 0
3 years ago
20 POINTS Compost costs $10 per cubic yard and topsoil costs $2 per cubic yard. Maria needs more than 10 cubic feet of topsoil.
Morgarella [4.7K]
I can't see the graph but let's use logic
hmm, more than 10 cubic feet of topsoil so the first and 2nd options are wrong

let's ee the costs
3rd option
10*1=10
2*12=24
10+24=34 and 34<50, that is fine

4th option
3*10=30
2*12=24
30+24=54
54>50, nope, that is over cost


answer is 3rd one
the one with 1 cubic yard compost and 12 cubic yard topsoil
8 0
4 years ago
Read 2 more answers
How do I round the number to those explanations and do question 2 so confused
wolverine [178]
1) Nearest thousand: 457,000 (Look at the thousandths place. Is the number closer to 457,000 or 456,000?)
Hundred: 457,000 (Look at the hundredths place. Is the number closer to 456,000 or 457,000?)
Ten: 456,990 (Look at the tenths place. Is the number closer to 456,980 or 456,990?)

2) The value of the expression when x=6 is 27. Explanation:
6x-7
6(6)-7
36-7
27
The value of the expression when x=3 is 11
Explanation:
6x-7
6(3)-7
18-7
11
6 0
3 years ago
Pamela hired a contractor to paint 75% of
Afina-wow [57]

Answer:

Solution is in photo

8 0
3 years ago
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