Charlene has five 1-pound bags of sand, each a different color. For an
art project, she will use 3/8 pounds of each bag of sand to create a
colorful sand-art jar. How much sand will be in Charlene’s sand-art jar.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

100 points? me its important ‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️