Answer:
-3x +8
Step-by-step explanation:
Apparently, you want to simplify the expression. That means you want to "collect terms", or "combine like terms."
"Like terms" are ones with the same variable structure. Here, the three terms in the expression are (-2x), (-x), and (+8). The ones that both have x as a variable are (-2x) and (-x). The way we combine these is to add the coefficients of the variable:
(-2x) +(-x) = x(-2) +x(-1)
= x(-2 -1)
= x(-3)
= -3x
So, the two "x" terms combine to give -3x. The constant term (+8) is not combined with anything. The simplified expression is then ...
-3x +8
_____
<em>Additional comments about writing and combining terms</em>
When math symbols are written next to each other, it means they are multiplied. -2x means (-2) × (x). It can be written several ways, including ...
- -2x
- (-2)x
- x(-2)
- (x)(-2)
- (-1)(2x)
Usually, the coefficient is written in front of the variable. In the above, we have chosen to write the coefficient after the variable so that the expression shows some parallelism with the usual expression of the <em>distributive property</em>:
a(b +c) = ab +ac
x(-2 -1) = x(-2) +x(-1)
Mass × gravitational energy × height
= gravitational potential energy
= joules
by interrelating the formula,
mass (unknown) × 10 × 629.9
= 2033.76
unknown = 0.32??
this is my working ^ but I'm not positive that it's 100% correct!
X-2=17
add two to both sides to cancel out the 2
x=19
Answer:
The horizontal value in a pair of coordinates: how far along the point is. The X Coordinate is always written first in an ordered pair of coordinates (x,y), such as (12,5). In this example, the value "12" is the X Coordinate. Also called "Abscissa"Step-by-step explanation:
Answer:
<h3> X=2 and x=4</h3>
Step-by-step explanation:
x+3>0 {or logarithm does'nt have a sense}
-4+3=-1 not >0 so the first two are out
-3+3=0 not >0 so the third also is out
2+3=5>0 and 4+3=7>0, so only the fourth could be the potential answer
