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Luba_88 [7]
3 years ago
11

What is the first term of the geometric sequence presented in the table below?

Mathematics
1 answer:
Rina8888 [55]3 years ago
8 0
176 = a1 * r^4
704 = a1 * r^6

dividing:-

r^2 = 706/174 =  4   so r = +/- 2

a1 =  176 / 2^4 =  176/16 = 11

So 11 is the first term 
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Find x<br><br> May I please receive help?
NikAS [45]

Answer:

x = 63°

Step-by-step explanation:

See the attachment

The measure of the angles in a triangle = 180 .  If the sides of a triangle are congruent, then the base angles are equal.  So in the triangle with the 72°, you have another angles = 72°.  Looking at the same triangle, 72° + 72° + part of the right angle = 180°. Do the math!  72° + 72° = 140°; 180° -144° = 36° (this is the measure of the piece of the right angle that is in the triangle with the 72° angle..   So the other part of the 90°(right angle) = 90° - 36° = 54°.

Now to solve for x:  You know that if the sides are congruent in a triangle, then the base angles are equal. Thus this triangle angles are x, x, and 54°.

You know that a triangle = 180°, so x + x + 54° = 180°; 2x +54° = 180°;           2x = 126°; x = 63°

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6 0
3 years ago
Read 2 more answers
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