Plllaaassseee !
line ae and line df are parallel. if m∠abg = 11x and m∠hcf = 10x + 9, what is m∠abg?

points b and c are on line gh between points g and h, line ae intersects with line gh at point b, line df intersects with line gh at point c

102°
99°
81°
9°

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?

Using elimination, what is -4x+2y=-12 4x+8y=-24

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.