This year 90 students signed up for the group talent contest if all the groups had the same number of students how many groups could be formed

A. 4 or 5
B 5 or 6
C 4 or 6
D 4 or 9

Answer

B) 5 or 6

Step-by-step explanation:

We can solve this by taking 90 and dividing it by 5 or 6

90/6 = 15

or

90/5 = 18

the answer MUST be a whole number. There cannot be .2 students (no decimals basically).

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.