Saturday

April 18, 2015

April 18, 2015

Posted by **lindsay** on Saturday, April 6, 2013 at 9:21pm.

- math -
**Ollie**, Saturday, April 6, 2013 at 9:59pmLet d be the difference between terms.

Let x be the first term.

The second term will be x + d.

The third term will be x + 2d.

Fourth term will be x + 3d.

But the fourth term is 20, so x + 3d = 20.

Continue this until you get the eighth term.

Write an equation about the eighth term.

Now you have two equations with two unknowns which you can solve to find both the first term and the difference.

**Answer this Question**

**Related Questions**

Utech - The 9th term of an Arithmetic Progression is 8 and the 4th term is 20. ...

MATH - Find the value of A + B if the A is the first term and B is the common ...

maths - The sum of the 3rd and 7th term of an A.P is 38 and the 9th term is 37.....

Math - 1) If the sum of the first n terms of a series is Sn where Sn=2nē-n, (a)...

math - 1) If the sum of the first n terms of a series is Sn where Sn=2nē-n, (a)...

Arithmetic Progression - In an AP the 6th term is half the 4th term and the 3rd ...

math - The 3rd term of a geometric progression is nine times the first term.if ...

math - The third term of a geometric progressiom is nine times the first term.if...

Math - The fifth term of an arithmetic progression is three times the second ...

Maths - The 4th term of an AP is 6 if d sum of d 8th and 9th term is -72 the ...