Question

can antone tell me if i am right on these please ???
Simplify : ( -3xy4)( -4x3y6) answer 12x^4y^10
Simplify (7x3y2)2 Answer 49x^6y^4
Write 243 in exponential notation.
A) 243 = 2.43 x 10^2

Answer 1

yes on number 1

Answer 2

yes on number 2

Answer 3

your 3rd one is scientific notation
but it is correct

Answer 4

thank you i was scared i did them wrong

Answer 5

no you did them correct. Remember you are using the laws of exponents

Answer 6

5)is this one right ? Simplify [ ( 1/4)2 – ( 1/2 )3 ] x 32

A) -1 + 32 = - 2
16 1

Answer 7

the 16 and the one is suppose to be under the -1 and the 32

Answer 8

is this the problem:
\[ ( (\frac{1}{4})^2 - (\frac{1}{2})^3) \times 32 \]
If so , the (1/4)^2 means (1/4)*(1/4) = 1/16
and (1/2)^3 means (1/2)(1/2)(1/2)= 1/8 = 2/16
so the problem is

\[ ( \frac{1}{16} - \frac{2}{16}) \times 32 = \frac{1-2}{16}\times 32= -1\times2= -2\]