Answer:
1:3
Step-by-step explanation:
Since your scaling down you divide the smaller number by the larger number
7/21=1/3
=1:3
Hope this helps :)
Solve the first equation for y.
3x+y=2
y=2-3x
Substitute
4x+(2-3x)=20
4x+2-3x=20
x=18
Answer:
16
Step-by-step explanation:
28682
Answer:
use a calculator 662x372=246264
Step-by-step explanation:
So an easy way to find these is by prime factorization. Factor the number until you can not factor any smaller. Start by dividing by smallest prime numbers like 3 or 2 for even numbers. Then look to find the correct number of roots.
Example : 4th root of 256
256
2*128
2*2*64
2*2*2*32
2*2*2*2*16
(2^4)*16
(2^4)*2*8
(2^4)*2*2*4
(2^4)*2*2*2*2
(2^4)*(2^4)
4th root of 256 = 2 × 2 = 4
Since it's an even power answer will be positive or negative. +4 or -4
A root is written as fraction power. So square root is to the power of 1/2 to the 7th power is 7*1/2 = 7/2
32^(3/5) = [32^(1/5)]^3
2^5 = 32
you can see this by prime factoring..
32
2*16
2*2*8
2*2*2*4
2*2*2*2*2
So the 5th root of 32 is 2
Then
2^3 = 8
