2. 30
3. 105
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-2/3 is a rational number
0.1111.... =1/9 - rational number
-2/3*1/5= -2/15 rational
1/9*1/5=1/45 rational
correct answer A and D
π and √11 are irrational numbers, and when they are multiplied by rational number, they will give irrational number.
Multiply both sides by any number you want. I'll pick 2
x = -3 turns into 2x = -6 after doing so
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Add anything you want to both sides. I'll pick 7
x = -3 turns into x+7 = 4 after doing so
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you can do a combination of both multiplication and addition, as long as you do the same thing to both sides. First I'll do multiplication. I'm going to multiply both sides by 2 first
x = -3 turns into 2x = -6
then I'm going to add 7 to both sides
2x = -6 turns into 2x+7 = 1
If you were to solve 2x+7 = -1, then you'd get to x = -3 again
As a check, replace x with -3 and we have...
2x+7 = 1
2(-3)+7 = 1
-6+7 = 1
1 = 1
we get a true statement, which helps confirm we have the right equation.
Square root of eight (2.83), pi (3.14), 4
Y = -4/3x + 1 or can be 3y = -4x + 3
they are both the same
