Maths question: 30 points

four boys alex, bryan, calvin and derrick, each have some stamps. the number of stamps alex has is 1/2 of the total number of stamps alex, calvin and derrick have. the number of of stamps calvin has 1/4 of the total stamps alex, bryan and derrick have. if derrick has 78 stamps, find the total number of stamps alex and bryan have altogether.

Type the correct answer in the box. function f, shown below, is translated down 3 units and left 4 units to create function g. f(x)= 3|x-2|-5 fill in the values of a, h, and k to write function g

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.