Please please please help me! I don't understand division at all I don't know what's wrong with this I'll give brianliest to most helpful and correct answer

The first problem

12.3

18.0

=30.3

Step-by-step explanation:

Step-by-step explanation:

 a)  

12.3+18=30.3

    1

    12.3

+   18

30.3

The equation is not set up properly. The 8 should be under the 2, as it is in the ones, while the 1 should be under the 1 as it is 10. The way they set it up tricks you to think that there is a decimal (1.8), when it is really 18.

b)

32.1 + 4.6 = 36.7

   32.1

+    4.6

36.7

6 + 1 = 7, so the 1 does not have to be carried as it does not equal 10. In this case it is 0.6 + 0.1 = 0.7, it would have to be 1.0 to carry it to the ones.

r(0,90)(x,y) . t(-5,0)

last option

step-by-step explanation:

∆def to ∆d"e"f"

- rotate 90 counterclockwise degrees

- then translated 5 to the left (x --> x - 5)

answer is the last option

(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