Answer:
it is 36 inches
Step-by-step explanation:
<h2><u>
Answer: I believe its 1 7/5. Sorry if its wrong! Have A Nice Day!! <3</u></h2><h2><u /></h2><h2><u>
- Niydia! :)</u></h2>
Answer:
Presently; Veeru is 15 and Neeru is 20
Step-by-step explanation:
Given
See comment for proper format of question
Let their present ages be x and y
So:
5 years time, the ratio will be:
Required
Their present ages
Express both ratios as fractions
becomes
and
becomes
Make x the subject in:
Cross multiply in
Substitute
Open brackets
Collect like terms
Divide by -0.25
Substitute in
Answer:
d=1, r=4/3
Step-by-step explanation:
For aritmetic sequence
a1=9
a1+3d=a4 9+3d=a4.
a1+7d=a8 9+7d=a8.
For geometric sequence
b1*r=b2
b2=a4, b1=a1=9
9*r=a4
b3= b1*r^2
b3=a8
a8=9*r^2
So 9+3d=a4
9+3d=9r
9+7d= a8=9r^2
So we have a system of equations
9+3d=9r
9+7d=9r^2
Multiply 9+3d=9r by -7 It is equal to -63-21d=-63r
And multiply 9+7d=9r^2 by 3. It is equal to 27+21d=27r^2
Then add them
-63-21d+ (27+21d)= -63r+27r^2
-36+63r-27r^2=0 /9
-4+7r-3r^2=0
3r^2-7r+4=0
r=1 r=4/3
If r=1 9+3d=9
d=0 (It is not right, d isn't equal to 0)
If r=4/3
9+3d= 9*4/3
9+3d=12
d=1
