get points by answering these!!?

Question

explain to me step-by-step how to do these , got cofused so plz help me.
Q:Evaulate each expression when a=3 b=-2 ,& c=1
1.24 - 7ab
= 24-7 ( __ ) ( __ )
=_____________
=_____________
2.-3b+ 2c
= -3 ( __ ) + 2 ( __ )
=______________
=______________

Answer 1

Go ask your teacher if you don't understand. You substitute the given numbers for the letter (wherever you see "a" you put 3, wherever you see "b" you put -2, etc. Then it's basic math from there on in.

Answer 2

1) 24- 7ab
= 24-7 (3) (-2)
= 24- (-42)
= 66

well first thing i do is that i multiply 7 to a and b which is 7(3)(-2) and then i get the sum of it which is -42 then i add 24 to 42 which becomes 66.

2) -3b + 2c
= -3(-2) + 2(1)
= 6 + 2
= 8

first thing i did is that i multiply -3 to -2 which becomes 6 then i multiply 2 to 1 which becomes 2, so i added 6 to 2 which becomes 8

Answer 3

1. 24 - 7ab
= 24 - 7(3)(-2)
= 24 - 21(-2)
= 24 + 42
= 66

2. -3b + 2c
= -3(-2) + 2(1)
= 6 + 2(1)
= 6 + 2
= 8

The answer to #1 is 66 and the answer to #2 is 8

Answer 4

24 - 7ab
=24 - 7 (3)(-2) (from here multiply 7 and 3 first and we get 21).
= 24 - 21(-2) ( now we can multiply 21 and -2, we get -42)
=24 + 42 (negative multiply by negative , we get positive)
=66


-3b + 2c
= -3(-2) + 2 (1)
= 6 + 2
= 8

just remember,
negative x negative = positive
positive x positive = positive
negative x positive = negative

Answer 5

Hope you do not play and are serious.

To finish to the answer you have to substitute 'a' with 3, 'b' with -2 and 'c' with 1.
1. 24-7ab
subsituting for 'a' and 'b' with 3 and -2 respectively
24-7*(3)*(-2)
=24-21*(-2)
=24-(-42)
=24+42
=66

2. -3b+2c
= -3(-2)+2*(1)
= -(-6)+2
= 6+2 = 8

In case you are one who used yahoo answers for playing, slap yourself. Else you have the answwer and your homework is done

Answer 6

You basically replace the variables (the letters) for their corresponding values (numbers). Problem 1: 24-7ab
Therefore Problem 1= 24-7(3)(-2)
multiply first (7x3x(-2))= 24-(-42)
same as 24+42= 66
Answer: 66

Answer 7

ok...
You just but the values of each letter insetad of the letter. Then do the multiplications first, then the substractions.

=24-7(3)(2)
=24-7(6)
=24-30
=-6

=-3(2)+2(3)
=-6+6
=0

Answer 8

24-7ab
24-7(3)(-2)
24-21(-2)
24+42=66
24+42=66
the answer is...66
---------------------------
-3b+2c
-3(-2)+2(1)
6+2=8
The answer is...8

Answer 9

3 2
1
1
to be honest i have know clue

Answer 10

yo man, my brain cells are way too smart to bother...