Will mark as brainliest for these questions. joe owns a sandwich shop. he charges $10.00 for two sandwiches and one drink and $6.50 for one sandwich and one drink. how much does joe charge per sandwich? how much per drink? what is the solution of the system? use elimination. 3 − 2 = 5 −2 + = −3 producing a musical costs $8,000 plus $300 per performance. one sold-out performance earns $700 income. if every performance sells out, how many performances are needed to break even? in a chemistry lab, you have two vinegars. one is 20% acetic acid and one is 50% acetic acid. you want to make 200 ml of a vinegar with 30% acetic acid. how many milliliters (ml) of each vinegar do you need to mix together?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

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?

What is the mean of the data set 125, 141, 213, 155, 281