Answer:
14.64
Step-by-step explanation:
A negative times a negative equals a positive and there are 2 decimal places.
Answer:
Step-by-step explanation:
2x - y = 8
<u> x + y = - 2 </u>
3x = 6
3x /3 = 6/3 Dividing bot sides by 3 to find x.
x = 2
Plug in the value of x to find y.
2 ( 2) - y = 8
4 - y = 8
-y = 8 - 4
- y = 4
y = -4
The solution: ( 2, -4)
Answer:
1. x ≤ 400
2. x ≥ 200
3. x < 20
Step-by-step explanation:
I am pretty sure that this is right. :)
Answer:
-1.5
Step-by-step explanation:
Mostly collect like terms
use associative property which is
(a+b)+c=a+(b+c)
and remember that:
you just use a general rule
x+x=2x
x^2+x^2=2x^2
3xy4xy=7xy
3x+4x^2=3x+4x^2
you can only add like terms( like terms are terms that are same name like x or y are differnt, and like terms have same power exg x^2 and x^3 and x^1/2 and such
so first one
3b+11c-4c-c
since they are all c except for the first one term, just assign a number for each so it simplifies to c times(11-1)+b(3-4)=c(10-1b=10c-b or
you just use a general rule
x+x=2x
x^2+x^2=2x^2
3xy4xy=7xy
3x+4x^2=3x+4x^2
second one9a-1+8c-8a+c
group like terms
(9a-8a)+(8c+c)-1=(a)+(9c)-1=a+9c-1
12c+5a+7-13c+4a
group like terms(12c-13c)+(5a+4a)+7
add like terms
-c+9a+7
the solution is 9a-c+7
-15-6c+3b-6c+9-2b
group like terms
(-15+9)+(-6c-6c)+(3b-2b)
-6+(-12c)+b=b-6-12c
the answers are:
10c-b
a+9c-1
9a-c+7
b-12c-6
