Answer:
192 students
Step-by-step explanation:
60 randomly students surveyed
16 chose aquarium as their favorite field trip.
720 students in total.
= 
=
720 × 16 ÷ 60 =
192 students
(predicted value - exact value)/exact value * 100
(31 - 34)/34 * 100 = 8.8%
Answer: -108/+18 = -6
Step-by-step explanation: Multiply 18 by -6 for B then it simplifies out.
Answer:
x = 2, y = 7, z = 12
Step-by-step explanation:
x + y - z = -3 (1)
3x - y + z = 11 (2)
x - 4y + z = -14 (3)
add (1) and (2)
4x = 8 x = 2
add (1) and (3)
2x - 3y = -17
2(2) - 3y = -17
-3y = -17 - 4
-3y = -21
y = 7
Find z using any equation
x + y - z = -3
2 + 7 - z = -3
9 - z = -3
z = 12
Answer:
4
7
w
=
16
Multiply both sides of the equation by
7
4
.
7
4
⋅
4
7
⋅
w
=
7
4
⋅
16
Simplify
7
4
⋅
4
7
⋅
w
.
Step-by-step explanation:
