Answer:
5
Step-by-step explanation:
15/3 - 4/3 = 11/3
15/3 = 5
Answer:
A, B, C, D,
Step-by-step explanation:
Answer:
C. The principal randomly selects homeroom classes and surveys each student in the chosen classes.
Step-by-step explanation:
Middle school is 6-8th. Surveying only the eighth-grade students won't give a representative sample of the whole school only the eighth-graders. Option A is incorrect.
Surveying only the students in detention represents a very small amount of students compared to the school, therefore it is not a representative sample. Option B is incorrect.
Yet again, the students in the math club is a small amount of students compared to the school. It does not represent the entire, or majority of the population. Option D is incorrect.
Picking students from homeroom classes and surveying each will give a wider variation of opinions from each grade and therefore a representative sample. Option C is the correct answer.
Answer:
a = - 3
Step-by-step explanation:
The equation has common factors x(x + 3) on both sides
For the 2 sides of the equation to be equal, then the factor
(x + a) = (x - 3) and by comparison
a = - 3
Answer:
<em>14 </em>° <em>;</em> <em>83 </em>°
Step-by-step explanation:
( 14x - 1 )° + ( 2x + 2 )° = 97°
14x - 1 + 2x + 2 = 97
16x = 96
x = 6
m∠BCA = ( 2 × 6 + 2 )° = <em>14 </em>°
m∠ABC = ( 14x - 1 )° = <em>83 </em>°
