the first and last term arithmetic sequence are 9 and 165 respectively. if the sum of all the terms of the arithmetic sequence is 3480,find the number of terms and the common difference of this arithmetic sequence

Step-by-step explanation:

Sum of n terms formula:

Solving for n

As we know that in a AP

Number of terms=40.

angle uzt is congruent to angle tzy. angle vzw is congruent to angle yzx.

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step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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