What mistake did this student make? 1. The 2nd equation was not rewritten in standard form

2. The 1st equation should have been multiplied by -1

3. x = -1 not 1

4. The are no mistakes in this student's work

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

Find the dimensions of the circle. area = 64π in.² r= in.

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p.mc) knowing that it is going to rain tomorrow, and going to bed before 9 p.md) knowing that you have a test in school tomorrow, and studying thw night before