You can find a unit rate by dividing the first number by another number to get something per something.
For example, if a question asked: What is the unit rare for 100 feet for 2 seconds, it would be 100/2, so it is 50 feet per second.
The lengths of the sides are 7, 23 and 24.
In order to find this, we need to add all of the side lengths together and set equa to 54. This will allow us to solve for n.
n + 3n + 2 + 4n - 4 = 52
8n - 2 = 52
8n = 54
n = 7
This gives us the length of the first side. To solve for the others, plug 7 into the equations.
3n + 2
3(7) + 2
21 + 2
23
Then the next one.
4n - 4
4(7) - 4
28 - 4
24
X^2 - 10x + 25 = 18. Send 18 to the other side. The equation becomes :
x^2 -10x + 7 = 0 Now solve for x, using the quadratic formula.
x = (-b +- /b^2 - 4ac)/2a
{+- (plus minus) /(square root) } Note: the square root is 4 the whole (b^2 - 4ac) from equation : x^2 -10x + 7 = 0 a=1, b= -10, c=7 Replace the values of a,b&c in the quadratic equation.
x = (10+-/((-10)^2 - (4*1*7))/2) = ( 10 + /72 )/2. [Simplify it on your own, here it seems to be pretty weird with these: +- and / as square root.] Well, at the end you should obtain x=(10 +- square root of 72) divided by 2
either: x = (10 + /72) divided by 2 = 9.24
or : x = ( 10 - /72) divided by 2 = 0.757
Pretty long explanation!!!!!!!
Answer:
y ⋅ (−3 − 7.8 ⋅ x)
Step-by-step explanation:
Each person will pay $54.00. You divide the total by 0.2 for the tip, which is 27. Divide 27 by 3 and you get nine. Now divide the 135 by 3, getting 45. Add the 9 to the 45 and you get 54! Hope this helps! :)