Obtain an equivalent system by performing the stated elementary operation on the system. Multiply the third equation by 1/8. 7x - y + 8z + w = -10 8x - z - 2w = 7 8x - 16y + 7z - w = -24 x + 3y - 8z = 1

the radius is 2 times the diameter.

step-by-step explanation:

answer: it is a.,b.,d.

step-by-step explanation:

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step-by-step explanation:

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1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.