Answer:
30:90
Step-by-step explanation:
120 divide by four
If you take one fourth out (30 or 1/4) it will remain three fourths (90 or 3/40
1 +3 = 4
120/4 = 30
.30x1 =30
30x3=90
Well, the first one, I have never worked with before so I'm sry but I can't help you with that one. 3y + x = 4 (x=1) 2y - x = 6 (x=8)
Answer:
D=7,-6 C=6,-6 E=7,-7 B =6,-7
Step-by-step explanation:
Answer:
r=3 where r is the common ratio
Step-by-step explanation:
The sum of geometric progression for n terms is given by:
, where is the
first term of the series and r is the common ratio.
Now, according to the question, there are four terms and they form a geometric progression. So sum of four terms is given as and .
Also according to the above formula:
Using the values as given in the question into the above equation we get:
[ Using formula ]
which is the required answer.