10+(6x5)+9 to the third power x 8.
Order of operations

  5872

Step-by-step explanation:

Any good graphing or scientific calculator can evaluate this for you according to the order of operations.

Parentheses are done first.

  = 10 + 30 + 9³×8

Exponentiation is done after parentheses.

  = 10 + 30 + 729×8

Multiplication and division are done in order left to right.

  = 10 + 30 + 5832

Addition and subtraction are done in order, left to right.*

  = 40 +5832

  = 5872

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The commutative and associative properties of addition can be used to rearrange the expression, if desired. Care is required when rearranging subtracted terms. (The sign must stay with the number.)

25/4

step-by-step explanation:

call segment cd's length x. because dc and ab are parallel, angle acd and cab, so triangles adc and abc are similar and we can set up the equation x / ac = ac / ab, or x / 5 = 5 / 4 and x = 25/4.

answer: about 22.67

step-by-step explanation: