How does the exponent of each power of ten correspond with placing a decimal

Which equation shows y+15=3x in standard form?

Evaluate - 3x^3 - 4x for x = A. 7 B. - 1 C. 1

Janice has a fair coin and she flips it 50 times. The coin landed on tails 20 times instead of the theoretical probability of 25. What might be the reason she did not get the expected 50%? A She needs to conduct less trials B.

A square with one side length is represented by the expression 4 (2x+3) + 16+8x. Use the properties of operations to write three different equivalent expressions to represent the lengths of the other three sides of the square.

Find the value of this expression if x = 9. x square + 6 over x-6.

A car travels at a speed of 85 miles per hour. How far will it travel in 15 mins?

2. A rectangular plot of land is 0.4 kilometer long and 0.07 kilometer wide. What is its area in square kilometers? Show your reasoning

In a right triangle, the measure of one acute is double the measure of the other acute angle. If the length of the short leg of the triangle is 3cm, find the length of the hypotenuse.

How much money would you have in 15 days if you get a penny doubled each day?

The area of a circle is 1256 square inches. What is the radius?