Please help me solve this equation : -1 - |-2(2)|

-1 - |-2(2)|
is the same as... 


 
Notice that the absolute value "strips off" negative signs, but the result is still subtracted from -1 

:)

The sum of ten distinct positive numbers is 100. The largest of the numbers is?

100-(1+2+3+4+5+6+7+8+9)=55 
 
so the greatest possible number is 55 

:)

-(b - 1) = 1 - b True or false statement? If so, is there such a rule and I simply cannot find it? Thank you!

True. First notice that the negative sign means multiply the terms in the bracket by -1. Then the terms were rearranged and simplified: 

-(b - 1) = (-1)b-(-1)(1)=-b-(-1)=-b+(-(-1))=-b+1=1+(-b)=1-b

Solve: Twelve is 66 2/3% of what number?

12=66 2/3 % of x means...

one number is wrong in this sequence what is that number: 1,6,27,64,125,216 ?

6 is not a perfect cube

The sum of two positive integers is 51. The first number is twice the second number. Find the two numbers.

n+m=51
m=2n 

n+2n=51
3n=51
n=51/3
n=17 
so the two numbers are 17 and 34 

:)

How can I rewrite the expression x+(y+-z)using the associative property of addition?

Associative property tells us that we can add in any order and the parenthese tells us where we are choosing to add first: 

x+(y+-z)=(x+y)+(-z)

12 over 25 + 13 over 40 =

Writing The square of a number is the second power of the number. The cube of a number is the third power of the number. Explain why these names are reasonable.

One reason is that the names of the geometric figures match the degrees of the exponents with the dimensions of the figures

Curtis and Ben have 60 Marbles between them. how many do they each have if Curtis has 4 times as many as Ben

1) b+c=60
2) 4b=c 


so that...
5b=60 

and...
b=12
so we get: 
b=12, c=48

Simplify -2x-5[x-(8+7x)]

Simplify 3(x-10)+2(x+4)

Operations on fractions

how many 1/8's are there in 2 5/8?

this is essentially a fraction division problem: 

How do you workout (16x-8)/(35) • (14)/(1-2x)

 

express and evaluate the distance between 84 and -34 using absolute value

the distance between any two points a and b on the number line can be written as 
 

Therefore 

 


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there are four different digits which when inserted in the blank space in number 4_5 make the number divisible by 3. Write them

If an integer's digits add to a multiple of 3, then the number itself is also a multiple of 3. 4 and 5 add to 9 so any digit between them that is a multiple of 3 will do the trick. Therefore or digits are 0, 3, 6, and 9. 



:)

How many of the first 600 counting numbers are divisible by 2 or 3

Numbers divisible by 6 are divisible by 2 and by 3 so we need to avoid counting them twice. 
600(1/2+1/3-1/6)=400 

:)

how do you simplify problems like 12(2/3)

what is a verbal expression for (5m)^2+2

two added to the square of the product of five and a number