6x-8=13 start off with adding 8 to 13 then 6x=21 then divide 6 to both sides getting x=3.5
Answer:
B
Step-by-step explanation:
a rational number is a number that can be expressed as a fraction p/q of two integers, q cannot be 0
so for A
Cannot be expressed as 2 integers as a quotient
so A is wrong
For B .125 is 1/8 so yes -2 is a integer so yes 2/5 are 2 integers so yes
and 
Is 4/3 so yes
B
Answer:
4x-10
Step-by-step explanation:
Multiply both by 2, 2x times 2 is 4x, and 5 times 2 is 10, so it becomes 4x-10.
N(75/100)=4.5 multiply both sides by 100
75n=450 divide both sides by 75
n=6cm
Answer:
2x+y=15x+y=10
Consider the first equation. Subtract 15x from both sides.
2x+y−15x=y
Combine 2x and −15x to get −13x.
−13x+y=y
Subtract y from both sides.
−13x+y−y=0
Combine y and −y to get 0.
−13x=0
Divide both sides by −13. Zero divided by any non-zero number gives zero.
x=0
Consider the second equation. Insert the known values of variables into the equation.
15×0+y=10
Multiply 15 and 0 to get 0.
0+y=10
Anything plus zero gives itself.
