Answer:
28 km per hour
Step-by-step explanation:
First determine the amount of time that the trip took
17:55 - 17:40 = :15 or 15 minutes
We need the time in hours
15 minutes * 1 hour/ 60 minutes = 15/60 hours = 1/4 hours
To determine speed, take distance and divide by time
7 km ÷( 1/4 hours)
Copy dot flip
7 * 4/1
28 km per hour
Answer:
x=0
Step-by-step explanation:
First, start by getting rid of your X values. You must take your lowest X value and find a way to move it to the other side. Our lowest X value is 3x, and it's currently being added to 1.
In order to move it, we must subtract it on both sides.
3x + 1 = 6x + 1
-3x -3x
1 = 3x + 1
Now we must get the X value by itself, which means doing everything reverse. For example, you would subtract the 1 instead of adding it.
1 = 3x + 1
-1 -1
3x = 0
divide by 3 on both sides
x = 0
Let's check
3(0) + 1 = 6(0) + 1
1 = 1
This is a true statement
Answer:
Move all terms to the left side of the equation and simplify.
3x²−12x−21=0
Use the quadratic formula to find the solutions.
(−b±√b²−4(ac))/2a
Substitute the values a=3, b=−12, and c=−21 into the quadratic formula and solve for x.
(12±√(−12)²−4⋅(3⋅−21)0/2⋅3 Simplify => x=2±√11
The result can be shown in multiple forms.
Exact Form: x=2±√11
Decimal Form: x=5.31662479…,−1.31662479…
Step-by-step explanation:
Answer:
General Formulas and Concepts:
<u>Pre-Algebra</u>
<u>Algebra i</u>
Step-by-step explanation:
<u>Step 1: Define</u>
<em>Identify</em>
<u>Step 2: Solve for </u><em><u>x</u></em>
- [Equality Property] Square root both sides:
