-9y+3x-z
The is the answer. All you need to do is add all the terms! Hope this helped you
Answer:
y = 27
Step-by-step explanation:
Given
y = 3x² ← substitute x = 3
y = 3(3)² = 3(9) = 27
Using the equations y-3x=3 and x+y=31 you can find that x=7 and y=24. There for x is the smaller of the two numbers.
2(x + 3) = 18
2x + 6 = 18
- 6 =
2x = 12
Divide 2
x = 6
Braddock should prepare 6 test tubes.
Given:
cylinder:
height = 40mm
radius = 12 mm
pi = 3.14
volume of test tube = 3014 mm³
We need to get the volume of the cylinder to know how much saline solution it holds.
Volume = π r² h
= 3.14 * (12mm)² * 40mm
= 3.14 * 144mm² * 40mm
Volume = 18,086.40 mm³
To get the number of test tubes used: we need to divide the volume of the cylinder by the volume of the test tube.
18,086.40mm³ / 3014mm³ = 6 test tubes.