Lets look a pyramid numbers
we have
1st=1
2nd=2
3rd=6
we notice that we jsut add the previous number on
so 1st=1
2nd=1+1
3rd=1+2+3
4th=1+2+3+4
so therefor to get from 100th to 101th, just add 101
4x+3+27=90
4x+30=90
90-30 =60
60/4 =15
X=15
Nope, the answer for (a) is 27.
To find (b), 27×3
Answer:
x=70, which is D.
Step-by-step explanation:
As you can see, (2x-30) and x are different angles, but add up to 180. So, we can make an equation that looks like this:
(2x-30)+x=180
2x-30+x=180
3x=210
x=70
:)
Answer:
7.8
0.2
Step-by-step explanation:
2 is in the ones place, to get to six you need the value of 2 in the tenths place (0.2)
2+5.8 is 7.8 (add the ones places together to get 7)
0.2+5.8=6 (add in the tenths place)
