Answer:
add 2x to both sides
Step-by-step explanation:
-x+2y=-10
2y=x-10
y=1/2x-5
a+b+c=68
b-3=a
c-5=b
now just solve the system of equations, substitue so that there are only b's in the equation:
a+b+c=68
(b-3) + b + (b+5) = 68
3b=66
b=22
Therefore Barbara is 22
Answer:
2/5
Step-by-step explanation:
2 / 4 could be divided by two in both sides.
2 ÷ 2 = 1
4 ÷ 2 = 2
2/4 = 1/2
Same goes for 2/8 and 2/6
2 ÷ 2 = 1
8 ÷ 2 = 4
2/8 = 1/4
2 ÷ 2 = 1
6 ÷ 2 = 3
2/6 = 1/3
2/5 however, could not be divided by two on both sides because there is 5 and it is not a factor of 2. So it is in its simplest form
Answer:
7*10*10*10 = 7000
7*10 = 70
70*10 = 700
700*10 = 7000
Step-by-step explanation:
The given expression is:
7*10^3
Here 10^3 means that 10 will be multiplied 3 times:
7*10*10*10 = 7000
How did we get 7000?
7*10*10*10 = 7000
7*10 = 70
70*10 = 700
700*10 = 7000
We can also say that there are 7 1000s in 7000....