Answer:
3x-3
Step-by-step explanation:
You have to combine like terms. <em>x</em> and 2<em>x</em> have the same variable, so this equals 3x, and then you subtract 3 so:
x-3=2x-3-x
=3x-3
You need the distance formula to figure this out. The coordinates for point D are (-5, 1), the coordinates for point E are (-2, 3), and the coordinates for point F are (-3, -2). For the distance or length of DE, the formula looks like this:
which simplifies a bit down to
which is
which of course is
so DE = 25. Moving on to EF:
which simplifies to
which is to say that
. We do the same for FD:
which simplifies a bit to
which is to say that the length of FD is
. None of the lengths of the sides are the same, so this is a scalene triangle. Last choice given above.
Answer:
3k - 12
Step-by-step explanation:
triple the kids (k) would be 3
so 3k to show 3 x k for triple.
once it started raining, 12 kids left. so that would be -12
so 3k - 12
42-13=29
29 times 2= 58
She began with 58 comic books!
U have to common factor that add up to -5 but times to 4 so basically the answer would be (x+5)(x-1)= 0 then you would get
x+5=0
x-1=0
both x’s are going to be different and have to equal to zero
x=-5
x=1
for the other one u just have to get two number that multiply to -49
x^2=-49
u square root the -49 and get -7 but u have to have both a positive and negative for 7
so
x=-7
x=7