Please help questions 18-20 for 49 POINTS

Mathematics

2 answers:

yanalaym [24]4 years ago

8 0

Ok, so since they arre all the same length....

18. sides are all same length
so
5-2x=-4x+9
solve
add 4x both sides
5+2x=9
mins 5 both sides
2x=4
x=2

sub back
5-2x=5-2(2)=5-4=1
the length of each side is 1
3 sides so the perimiter is 3 units

19.
same side length so
3(x-1)=5x-6
distribute
3x-3=5x-6
minus 3x both sides
-3=2x-6
add 6 both sides
3=2x
divide 2
3/2=x
sub back
5x-6
5(3/2)-6
15/2-6
7.5-6
1.5

5 sides so
1.5 times 5=7.5 units is the perimiter
which is about 15/2 units

20.
we can't see what's after the x+? so this is a mystery quesiton

Sauron [17]4 years ago

3 0

<h2><em>I cant see Question 20 tho</em></h2><h2><em>I wan to help if I can see it</em></h2>

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