Algebra 1 Answer Evaluation (Reiny)
posted by Anonymous .
Evaluate each expression for the given value(s) of the variable(s).
1. t^6 for t = 2
A: 1/64
2. r^0s^2 for r = 8 and s = 10
A: 1/100?
Simplify.
3. x^4/x^6
A: 1/x^4y^6? Or x^4y^6?
4. a^3/b^2
A: 1/a^3b^2? Or a^3b^2?
5. The lead in a mechanical pencil has a diameter of 0.5 mn. Write this number in scientific notation.
A: ?
Simplify.
6. 3^5 x 3^3
A: 3^2
7. a^3 x a^6 x a^2
A: a^15
8. (3x^4)^3
A: 27x^12
9. (4d^7)^2
A: 16d^14

#1. Nope 2^6 = 64 (2*2*2*2*2*2)
2^6 = 1/2^6 = 1/64
#2 ok
#3 where did the y's come from? When dividing, subtract exponents
x^4/x^6 = x^(4(6)) = x^10
#4 negative exponents indicate reciprocals. As a shortcut, they mean the item switches top and bottom in a fraction
a^3/b^2 = b^2/a^3
#5 0.5 = 5.0x10^1
#6 ok
#7 nope. add the exponents when multiplying
a^(362) = a^5
#8 ok
#9 nope.
(4)^2 = (4)(4) = +16
4^2 = (4^2) = 16
powers are done before subtraction unless parentheses change the order. 
1. 2^4 = 64 , not 1/64
2. ok
3. x^4 y^6 , your first choice is incorrect
4. a^3/b^2 = a^(3 (2)) = a^1 or 1/a
5. 0.5 = 5.0 x 10^1
6. 3^2 = 9 , they probably want the actual answer
7. a^3 x a^6 x a^2 = a^5 or 1/a^5 , notice 362=5
8. ok
9. (4d^7)^2 = +16 d^14
looks like some further review is needed. 
I am confused. Both of you has written different answers to many of the questions I have answered incorrectly. Which is correct?

I messed up in #3 and #4
#3, I looked at your answer and saw the y's, should have looked at the original question which had no y values.
answer is x^10 , see Steve's
#4.
a^3/b^2 = b^2/a^3, see Steve's
We have the same answers for the rest
Respond to this Question
Similar Questions

algebra
Evaluate the expression for the given value of the variable.. 0.3xwhen x=2.5 
Math PIZZAZZZ
how does a rodeo star get around?? well if you cant give me an answer can you help me. heres the instructions First Simplify the expression below. Then evaluate the expression for the given value or the variable. Find the simplified 
Gr. 10 Math
Evaluate each expression for the given value(s) of the variable(s). 2x^2  3xy + 4y^2 for x=2, y=1 My Answer: (2(2^2))  (3*2*1) + (4(1^2)) = 10 Text Book Answer: 18 Please help. Am I doing something wrong? 
algebra
Evaluate the expression for the given value of the variable(s) [4b8]+[1b^2]+2b^3; b=2 
algebra
Show all steps evaluate the expression for the given value of the variable 5 a+5b,a=6,b=5 
algebra
Show all steps evaluate the expression for the given value of the variable 5a+5b,a=6,b=5thanks 
math (algebra)
explain how to evaluate an expression with a variable when you are given a value for the variable 
algebra
Evaluate the expression for the given value of the variable(s). x2  4x; x = –3 A. –17 B. 11 C. –1 D. 3 d ? 
Algebra
If anyone can check my work for me that would be greatly appreciated I'm having trouble. Evaluate the expression foe the given value of the variable. 4b8+1b^2+2b^3 ; b=2 I got 1 for my answer 4(2)81+2^2+2(2) 881+2^24 … 
Algebra
Evaluate the algebraic expression for the given value of the variable. 4,x^218= 10 Please check my answer