Which best describes the fraction represented by the shaded portion of the circle?
O Since 3 of the 10 equal parts are shaded, the
shaded portion represents to
O Since 3 equal parts are shaded and 7 are not
shaded, the shaded portion represents
O Since 7 of the 10 equal parts are unshaded, the
shaded portion represents To
O Since 7 equal parts are unshaded, the shaded
portion represents. Plz I need this

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.

Can someone me with this? i’m not sure what to put for my equations.

Exercise: counting committees 0.0/2.0 puntos (calificable) we start with a pool of n people. a chaired committee consists of k≥1 members, out of whom one member is designated as the chairperson. the expression k(nk) can be interpreted as the number of possible chaired committees with k members. this is because we have (nk) choices for the k members, and once the members are chosen, there are then k choices for the chairperson. thus, c=∑k=1nk(nk) is the total number of possible chaired committees of any size. find the value of c (as a function of n ) by thinking about a different way of forming a chaired committee: first choose the chairperson, then choose the other members of the committee. the answer is of the form c=(α+nβ)2γn+δ. what are the values of α , β , γ , and δ ?