Add the following polynomials: (−x^3 + 26x^2 − 7x − 13) + (6x^4 − x^3 +8x + 27)6x4  −2x3  +  26x2  −15x  +  14−6x4  +  26x2  +  x  +  146x4  +26x2  −x  −  146x4  −2x3  +  26x2  +x  +  14

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.