PLZ HELP
The purity of gold is measured in carats. 24-carat gold is pure gold, and has a density of 19.3
g
cm3
. 18-carat gold is often used for jewelry because it holds its shape better than pure gold. An 18-carat ring, which is 75% pure gold, has a mass of 18 g. What volume of pure gold was used to make the ring, to the nearest hundredth?

Tracy solved the following problem. which of the statements is true? 9 ÷ 3 + 6 × 2 3 + 6 × 2 9 × 2 18 her answer is correct. her answer is incorrect. she should have multiplied before dividing. her answer is incorrect. she should have multiplied before adding. her answer is incorrect. she should have added before dividing.

The label on the car's antifreeze container claims to protect the car between ? 40°c and 125°c. to convert celsius temperature to fahrenheit temperature, the formula is c = 5 over 9 (f ? 32). write and solve the inequality to determine the fahrenheit temperature range at which this antifreeze protects the car. ? 40 > 5 over 9 (f ? 32) > 125; ? 40 > f > 257 ? 40 < 5 over 9 (f ? 32) < 125; ? 40 < f < 257 ? 40 < 5 over 9 (f ? 32); ? 40 < f 5 over 9 (f ? 32) < 125; f < 257

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2