Which situation can be modeled by the inequality 60−15x≥760-15x≥7? 1 )you borrowed $60 from your older brother. you pay him $7 a week and need to pay him back within 15 weeks 2 )you owe your parents $60 and plan to pay them $15 a week until you owe them less than $7. 3 ) you can buy playlists in packages of 15 songs. you have $60 to spend but want to have at least $7 left. 4)you have $60 to spend on hats at the mall, but you need to save at least $7 for lunch. you plan to spend the rest on hats that cost $15 each (including tax).

Rewrite 9 log, x2 in a form that does not use exponents. 9log, x = log, x

Submarines control how much they float or sink in the ocean by changing the volume of air and water contained in large ballast tanks. when the tanks are completely full of water, the submarine increases its overall mass and sinks down to the bottom. when the tanks are completely full of air, the submarine reduces its overall mass and floats to the surface. depending on the density of the seawater surrounding the submarine, it will pump seawater in or out of the tanks in order to achieve the same overall density as the sea water and float neutrally in the water. the volume of the submarine never changes. when the tanks are completely full of water, a submarine with a volume of 7.8\times10^3\text{ m}^37.8×10 3 m 3 7, point, 8, times, 10, start superscript, 3, end superscript, space, m, start superscript, 3, end superscript has a total mass of 8\times10^6\text{ kg}8×10 6 kg8, times, 10, start superscript, 6, end superscript, space, k, g. the density of the seawater is 10^3\text{ kg/m}^310 3 kg/m 3 10, start superscript, 3, end superscript, space, k, g, slash, m, start superscript, 3, end superscript. to make that submarine float neutrally, and neither float nor sink in the ocean, what volume of water does that submarine need to subtract from its tanks?

Ashley spent half of her lunch money on a turkey sandwich. then she spent two-thirds of the money she had left on a bottle of juice and the rest of the money on a cookie. if the cookie cost $.75, how much lunch money did ashley have to start with?