Answer:
There are many expressions equivalent to this one, but an example would be 2.5x - 5y - 2.5
Step-by-step explanation:
In this version of the expression, you don't need the parenthesis. If a term is along in parenthesis and all of the operations are addition and subtraction, you can eliminate it.
Also, if you add a negative number, it is the same as subtracting.
Answer:
please look at the attached picture and I hope you understand because I made it really easy to understand
Let x + 15 = total penguins
15/ (x +15) = .30
15 = .30x + 4.5
.30x = 10.5
x = 35
Total penguins = 15 + 35 = 50
Double Check
15 / 50 * 100 = 30% Correct!!!
Each of these equations follows the standard form: y = mx + b
The variable "m" is the slope, and the variable "b" is the y-intercept.
Therefore, with the equation y = 8/3x - 5, the slope ("m") would equal 8/3 and the y-intercept ("b") would equal -5
54+9= 63 m = distance and time=35 sec hence, speed= 63/35=9/5=1.8 m/s
time taken to reach water surface= distance/speed=54/1.8=30 sec
