Let the number be x.
2x-3=55
2x=55-3
2x=52
x=52/2
x=26
- - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - -

❖ A number y increased by 5 is at least -21.

❖ First, if you come across the word "increased" it means we
"increase" a number, or add something to that number, like
y increased by 5

Now, we are also given that this expression is at least -21, which means it can't be -21; it can be -21 or it can be greater than -21.
So we have

<em>Solving for y</em>
<em></em>
- Subtract 5 on both sides:-


So the values of y greater than or equal to -26 will make this inequality true.
<h3>Good luck with your studies.</h3>

Answer: 300*0.73^x
Step-by-step explanation:
300 is the initial value and every time x goes up by 1, the value get multiplied by 0.73
when x=3
then the value would be 300*0.73*0.73*0.73 or 300*0.73^3
then for x amount of times the equation would be 300*(0.73 x times ) or 300*0.73^x
Answer:
5n-42 = 12n
-5n -5n
----------------------
-42 = 7n
___ ___
7 7
--------------------------
-6 = n
Step-by-step explanation:
um for reasoning: get all the n variables to one side and solve for n (dont know how much more to reason)

which follows from the definition for expected value,

where

is the probability density function for

.