Answer:
x = 24
Step-by-step explanation:
1. First, let's translate the statement into an equation.
- Twice a number means 2x
- is means equal =
- 48 less than 4 times a number means 4x - 48
- 2x = 4x - 48
2. (solving)
Step 1: Subtract 4x from both sides.
Step 2: Divide both sides by -2.
Step 3: Check if solution is correct.
Therefore, x = 24.
4x + 4° + 4x - 32° = 180°
8x - 28° = 180°
8x = 180° + 28°
8x = 208°
x = 26°
The conversion factor is always a fraction that's equal to ' 1 '.
To convert meters to miles, multiply by
(1 mile) / (1,609.3 meters) .
Answer:
she took 13 classes that were worth 3 credits
Step-by-step explanation:
well we know that some of the classes are worth 3 and some are worth 4 and that all of these together = 59 so your first equation would be
3x+4y=59
x would be the number of classes worth 3 credits and y would be the number of classes worth 4 credits.
then it says the total number of classes that they took was 18 so we know that
x + y =18.
you want to solve for the number of 3 credit classes so lets go ahead and get rid of the y values. SO you need you multiply the x+y equation by 4
4x+4y=72
then subtract 4x+4y=72 from 3x+4y=59 to get
-x = -13
and then x is a negative so you need to divide -1 from both sides and you get that she took 13 classes that were worth 3 credits.
I just took the test the correct answer is:
Amplitude = 3 feet; 3 period = 16 hours; midline: y = 5.