The ratio of the side lenghts of 2 similar triangles is 3:5. The smaller triangle has sides that measure 4 cm, 6 cm, and 8 cm. What is the perimeter, in cm, of the larger triangle?

a.) 30
b.) 40
c.) 10 4/5
d.) 20
e.) 18

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

What is the value of the discriminant, b2 ? 4ac, for the quadratic equation 0 = x2 ? 4x + 5, and what does it mean about the number of real solutions the equation has?