Answer:
A
Step-by-step explanation:
Given
21 ≤ - 3(x - 4) < 30 ← divide all 3 intervals by - 3
Remembering to reverse the direction of the signs as a result of dividing by a negative quantity
- 7 ≥ x - 4 > - 10 ← add 4 to each interval
- 3 ≥ x > - 6, that is
- 6 < x ≤ - 3 → A
Expression: 5 - 1.5b = flour left (b=batches)
Answer: 0.5 cups of flour left
Im not certain on the expression but the answer is correct. Hope this helps!
Answer:
System of equations:
20x + 30y = 650
x + y = 25
Time underwater = 10 hours
Time at the surface = 15 hours
Step-by-step explanation:
Let x = time underwater at 20 km/h.
Let y = time on the surface at 30 km/h.
speed = distance/time
distance = speed * time
distance underwater: 20x
distance on the surface: 30y
total distance: 650
20x + 30y = 650
total time: x + y
total time: 25
x + y = 25
20x + 30y = 650
x + y = 25
20x + 30y = 650
-20x - 20y = -500
--------------------------------
10y = 150
y = 15
x + y = 25
x + 15 = 25
x = 10
A fraction is numerator over denominator, most of the time whole numbers
Answer:
If its a true or false question its false
Step-by-step explanation: