Find the dimension of matrix A.

(a) 2 x 6
(b) 5 x 5
(c) 5 x 2
(d) 1 x 5
(e) none


(e) none

Mathematics

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Simplify the expression.3x + 1 + 7x + 12

A. 10x + 13 B. 21x + 13 C. 20x D. 10x

Mathematics

Use regression to find a quadratic function that best fits the data. Give results to the nearest hundredth.

A. f(x) = 0.15x2 + 38.67x + 891.67 B. f(x) = 0.05x2 - 13.25x + 790.18 C. f(x) = 0.15x2 - 38.67x + 891.67 D. f(x) = 0.05x2 + 13.25x + 790.18

Mathematics

Find the x- and y-intercepts. Then graph the equation. x = 1

A. (1, 0); none

B. None; (0, 1)

C. None; (0, 1)

D. (1, 0); none

Mathematics

Solve.-6b + 8 + 4b = -3b + 13

A. b = 5 B. b = -13 C. b = -8 D. b = 13

Mathematics