Question

Q1. when 3b-4a is evaluated for a=0.5 and b=-0.333333333. what is the answer?

Answer 1

Answer:

See below

Step-by-step explanation:

Q1. when 3b-4a is evaluated for a=0.5 and b=-0.333333333. what is the answer?

$3b-4a, a=0.5 \text{ and } b=-0.333333...$

Once

$-0.3333333... = -\frac{1}{3} \text{ and } 0.5=\frac{1}{2}$

$3\cdot \left(-\frac{1}{3}\right) - 4 \cdot \frac{1}{2} = -1 - 2 =\boxed{-3}$

Q2. solution for equation  

$5(x+1)-3(3x-1)=15(x-2)$

$5x+5-9x+3 = 15x-30$

$-4x+8 = 15x-30$

$38 = 19x$

$x=\frac{38}{19} = \boxed{2}$

Q3. which is not equivalent to $4(2x-1)=3(x+1)-2$

Just try all the values.

None of them makes the equation equivalent.

$8x-4=3x+1-2$

$5x=5$

$\boxed{x=1}$

Q4. if a<0 and b<0 which of the following is not positive

B. a+b

$a$

$b$

$a \cdot b \implies \text{positive value}$

$\frac{a}{b} \implies \text{positive number}$

$a:b \text{ is just another notation for division}$

$a+b \implies \text{negative number}$