Someone me btw the coordinates are (-5,-2) (2,-2) (0,4)
the first thing to do is to subtract 16 from both side of the equation:
16 - 16 - b = 7 - 16
the 16s on the left cancel out resulting in:
-b = -9
think of the -b as -1(9). this is multiplication. by doing the inverse operation (division) we can get rid of the negative on the b. we will divide both sides by -1.
this leaves a positive b. since both parts of the right side of the equation are negative it becomes positive ( a negative divided by a negative is a positive).
the final answer is b= 9.
check our work by plugging in the b value (9) into the original equation:
16 - 9 = 7
7 = 7 is true so we now we have the right answer.
option a. 4, 4.5, 5, 5.5
left point: a=x=4
right point: b=x=6
width of each of the four equal intervals: w=2/4→w=0.5
the first left endpoint is x1=a→x1=4
the second left endpoint is x2=x1+w→x2=4+0.5→x2=4.5
the third left endpoint is x3=x2+w→x3=4.5+0.5→x3=5
the fourth left endpoint is x4=x3+w→x4=5+0.5→x4=5.5
then, the list is: x1, x2, x3, x4 = 4, 4.5, 5, 5.5
1.00 is the price of the battery. since the torch cost 1.50 more than the battery we just subtract what we know is how much more the torch cost from the total cost. while this has no meaning to the question i just wanted to put this in here.
first we divide 1.50 by 2.50 to get it as a decimal. which gives us 0.6. now we put 6/10 then try to simplify it.
3/5 is our answer