Use three of the numbers 3, 4, 5, 12, or 15 to complete the number sentence. do not use any number more than once. ( - ) ÷ = 3

(15 - 3) ÷ 4 = 3

Step-by-step explanation:

What number when divided into something will give 3. You can go through the givens.

If it is 5 then you have to have 15 inside the brackets. That is not possible with this question because you must be subtracting. So the 3rd blank can't be 5

Could the third blank be 3? Then you would need 9 inside the brackets. There is no way to get a difference of 9 with those 5 numbers. So the third blank is not 3

How about 4? That would mean that number inside the brackets would be 12. Is that possible. Good choice.

15 - 3 = 12 Now we are getting some where.

(15 - 3) ÷ 4 is your answer

= (15 - 3) ÷ 4      Subtract inside the brackets

= 12 ÷ 4

= 3 which checks.

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.

step-by-step explanation:

the triangles are similar. therefore the corresponding sides are in proportion:

              cross multiply

            divide both sides by 32