Answer:
Step-by-step explanation:
Answer:
100%
300 students
Step-by-step explanation:
let b = number of students in the school
this equation can be derived = 10% x b = 30
to find b, divide both sides of the equation by 10%
b = 30/0.1 = 300
we want find the total number of students in the school, which is equal to 100%
Answer:
112 cm^2
Step-by-step explanation:
Area of a rhombus is equal to half of the product of the diagonals, so it is 14 * 2 * 8 / 2 = 14cm * 8cm = 112 cm^2.
Other point of view: It is the sum of areas of two triangles of area 14*8/2. So the area is 14*8.
It is easiest to simply just substitute any of the choices into the original equation and see which one satisfies the equation.
Given the equation: 3 * |5 + x| = 12
Using choice A. x = 7
3 <span>* |5 + 7| = 12
</span>36 =/= 12
Using choice B. x = 1
3 <span>* |5 + 1| = 12
</span>18 =/= 12
Using choice C. x = -9
3 <span>* |5 + -9| = 12
</span>12 = 12
Therefore, the correct answer is C. -9