EXTRA POINTS IF YOU CON HELP 10000 POINTS IF YOU CAN HELP ◑ω◐ 4 Quotations
1. tell whether each statement is True or False.
a. 0.45 - (-0.4) = 0.85 True False
b. -1 5/8 - (-5 5/8) = -7 2/7 True False
c. -7 3/7 + 1/7 = -7 2/7 True False

2. consider the following equations.

-5/6 + = a negative number
a. wright a fraction that makes this equations true.

b. Show that your fraction makes that equations true.


3.During a hot summer week, the water level in Wei's pool decreased by 1.9 centimetres. Wei added water to the pool, increasing the level by 3.5 centimetres. During the next week, the water level decreased by 2.4 centimetres. How does the new water level compare to the original water level?
Show your work.

Solution

4.If a is a negative rational number and b is a positive rational number, which of the following must be true? Give an example for the statements that are true and a counterexample for the statements that are false.
a. a - b is positive

b. b - a is positive

c. b + (-a) is a negative

Pleas help me EXTRA POINTS IF YOU CON HELP 10000 POINTS IF YOU CAN HELP ◑ω◑ 10000 points ◐ω◐

In tossing one coin 10 times, what are your chances for tossing a head? a tail? 2. in tossing one coin 100 times, what are your chances for tossing a head? a tail? 3. in tossing one coin 200 times, what are your chances for tossing a head? a tail? deviation = ((absolute value of the difference between expected heads and observed heads) + (absolute value of the difference between expected tails and observed tails)) divided by total number of tosses. this value should always be positive. 4. what is the deviation for 10 tosses? 5. what is the deviation for the 100 tosses? 6. what is the deviation for 200 tosses? 7. how does increasing the total number of coin tosses from 10 to 100 affect the deviation? 8. how does increasing the total number of tosses from 100 to 200 affect the deviation? 9. what two important probability principles were established in this exercise? 10. the percent of occurrence is the obtained results divided by the total tosses and multiplied by 100%. toss the coins 100 times and record your results. calculate the percent occurrence for each combination. percent head-head occurrence: percent tail-tail occurrence: percent head-tail occurrence:

Which is a graph of a proportional relationship?

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k