Where do i put parentheses to make 30-4x3+5=2 true?? I need to turn this in tmr and I'm so close to just writing "I give up" In the answer key.

With these types of problems, it's all about luck. You have to try every combo you can think of before landing on the answer.

Fortunately, there aren't too many combos to try out. There's also a fairly methodical process to make sure you try every combo.

I'll start having the left parenthesis at the very left side. The right parenthesis will steadily march through the expression.

So far, no good. The goal of course is to get a result of 2. Let's now place the left parenthesis immediately after the 30. Like before, the right parenthesis will progress steadily through until we each the right most side.

We haven't found it here either.

Let's place the parenthesis just after the minus sign.

Still not what we want.

Let's place the parenthesis just after the multiplication symbol x.

We land on -2 which I think your teacher might have been going for. Unfortunately (as far as I can see), it's not possible to insert one set of parenthesis and have the expression 30-4x3+5 become 2.

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3

step-by-step explanation:

where is the questions