Tyler says that an equivalent expression for 2 exponent of 3 times 5 exponent is 10 exponent of 9 is he correct?

How do you use the elimination method for this question? explain, because i really want to understand!

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Agroup of students want to create a garden. they do not know the exact measurements but they propose using a variable to represent the length and width of the garden. the length of the garden is 10 feet longer than double the width. use a single variable to write algebraic expressions for both the length and width of the garden. write an algebraic expression for the area of the garden. use mathematical terms to describe this expression.