Question

I have a 8 questions on my little brother's homework assignment that he needs help with. Honestly, I don't want to help him at all. Help? Also, if you plan on helping please answer them all.


1. The table shows the average low temperature at Anchorage, Alaska, from December 17 to December 24. At the bottom of the table is the average temperature for the 8-day period.

17-dec
18 -dec -8
19 -dec 1
20 -dec 10
21 -dec -1
22 -dec 7
23 -dec 4
24 -dec 6
average=1.25

What was the low temperature on December 17?

2. This is an equation.

-6+(-6)+(-6)+(-6)+[(-3)+(-3)+(-3)+(-3)+(-3)+(-3)]=(-6)(◻)

What is the missing number that makes this equation true?

3. Which expression is equivalent to (-4)(5)?

choose an answer for 3:
-5+(-5)+(-5)+(-5)

5+5+5+5

4+4+4+4+4

4. Lori uses the counters to find the product of two integers. The given counters represent negative numbers. (suppose the - sign in the pharantesis are circle counters)
(-) (-) (-) (-) (-)
(-) (-) (-) (-) (-)
(-) (-) (-) (-) (-)
Which expression is Lori trying to evaluate?

5. The temperature of a lake drops by the same amount each day for 10 days. The temperature drops by a total of 5 degrees.

Put the correct numbers to form the equation that represents the change in the lake's temperature each day.

6. Ben's loses weight by the same amount each week for 6 weeks. He loses a total of 18 pounds.

Put the correct numbers to form the equation that represents the change in Ben's weight each week.

7. Jill uses the counters to find the product of two integers. The given counters represent negative numbers. (suppose the - sign in the pharantesis are circle counters)

(-) (-) (-)
(-) (-) (-)
(-) (-) (-)
(-) (-) (-)

Which expression is Jill trying to evaluate?

8. The table shows the annual profit or loss of Famed Film Corporation for the years 2003 to 2010 and the average profit of $0.3375 million for the 8-year period.
year | profits lost/millions
2003 $-1.30
2004 $-0.10
2005 $1.50
2006 $0.80
2007 $1.50
2008 ?
2009 $1.25
2010 $0.55
average- $0.3375


What was the profit/loss in 2008, in millions? Round your answer to the nearest hundredth.


Thanks!

Answer 1

1.) Average = sum of data / number of data
Let the low temperature of Dec 17 be x, then (x + -8 + 1 + 10 - 1 + 7 + 4 + 6)/8 = 1.25
x + 19 = 1.25 x 8 = 10
x = 10 - 19 = -9
Therefore, the low temperature on 17 Dec is -9.

2.) -6+(-6)+(-6)+(-6)+[(-3)+(-3)+(-3)+(-3)+(-3)+(-3)] = -6 - 6 - 6 - 6 + [-3 -3 - 3 - 3 - 3 - 3] = -6 - 6 - 6 - 6 - 6 - 6 - 6 = (-6)(7)
The missing number is 7.

3.) (-4)(5) = (4)(-5) = -5+(-5)+(-5)+(-5)

4.) The number Loli is trying to evaluate is (-5)(3)

5.) The temperature drops by 5/10 = 0.5 degrees each day.
Let x be the day's starting temperature and y be the day's end temperature,
x - y = 0.5

6.) He looses 18/6 = 3 pounds of weight each week.
Let x be his weight at the start of the week and y be his weight at the end of the week, then
x - y = 3

7.) Jill is evaluating (-3)(4)

8.) Average = sum of data / number of data
Let the profit/los of 2008 be x, then
(-1.30 - 0.10 + 1.50 + 0.80 + 1.50 + x + 1.25 + 0.55)/8 = 0.3375
4.2 + x = 0.3375 x 8 = 2.7
x = 2.7 - 4.2 = -1.50
Therefore, the loss of 2008 is $-1.50