Mary spent half of her allowance going to the movies. she washed the family car and earned 6 dollars. what is her weekly allowance if she ended with 15 dollars ?

Evaluate the expression. (9 + 5)(3 + 2)0

The half-life of a certain material is 0.004 second. approximately how much of a 20-gram sample will be left after 0.016 second? a. 5 grams b. 16 grams c. 0.32 gram d. 1.25 grams

What are the solutions of the equation x4 – 5x2 – 14 = 0? use factoring to solve. someone !