Gwen went walking 3 days one week. the first day, she walked 3 1/2 miles. each day after that, she walked 1/4 mile more than the day before. how many miles did gwen walk this week?

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

Use the x-intercept method to find all real solutions of the equation. -9x^3-7x^2-96x+36=3x^3+x^2-3x+8

What is the absolute value of the complex number -4-sqrt2i