Select all statements below which are true for all invertible n×n matrices a and b
a. ab=ba <...
Mathematics, 25.08.2019 06:00 jzjzjzj
Select all statements below which are true for all invertible n×n matrices a and b
a. ab=ba
b. (a+b)(a−b)=a^2−b^2
c. a+a^−1 is invertible
d. a^3b^8 is invertible
e. (aba^−1)^4=ab^4a^−1
f. (a+a^−1)^9=a^9+a^−9
Answers: 1
Mathematics, 21.06.2019 16:20
Tomas is making trail mix using granola and walnuts. he can spend a total of $12 on the ingredients. he buys 3 pounds of granola that costs $2.00 per pound. the walnuts cost $6 per pound. he uses the equation to represent the total cost, where x represents the number of pounds of granola and y represents the number of pounds of walnuts. he solves the equation for y, the number of pounds of walnuts he can buy. answer- b tomas added 6 to both sides of the equation instead of subtracting 6. just took the test
Answers: 1
Mathematics, 21.06.2019 19:00
Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 8 = -6x a. –7.12, 1.12 b. 7.12, –1.12 c. 7.12, 1.12 d. –7.12, –1.12
Answers: 2
Mathematics, 21.06.2019 20:10
Acolony contains 1500 bacteria. the population increases at a rate of 115% each hour. if x represents the number of hours elapsed, which function represents the scenario? f(x) = 1500(1.15)" f(x) = 1500(115) f(x) = 1500(2.15) f(x) = 1500(215)
Answers: 3
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