Pls help asap! It’s due in one hour!! 1. x+y= 7
7x + ty = 77
The system above has NO SOLUTION when t= ?

2. x+y=7
7x+ty=49

The system above has INFINITELY MANY SOLUTIONS when t= ?

7x+8y=-18, 4x-9y=-3 solve the system of equations

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.