If a coin is flipped three times what is the probability of getting heads at least twice. AND PLS HELP I NEED ANSWERS FOR A 21 PROBLEM MATH TEST I Am WELLING GIVE HECK OF POINTS FOR THIS And PLS GIVE RIGHT answers I been HAVING ALL F’s FOR 3 SERMERTS PLS HELP ME OUT GUYS and I keep leaving questions

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv

Which of the following represents the factorization of the trinomial below? x^2+7x-30