Solve the problem.y varies jointly as x and z. y = 2.4 when x = 30 and z = 8. Find y when x = 40 and z = 8.
A. 6.4
B. 3.2
C. 32
D. 320
Answer: B
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Express the number in decimal notation.7 × 10-7
A. 0.0000007 B. -700,000 C. 0.00000007 D. 0.000007
Factor completely, or state that the polynomial is prime.x + 216x4
A. x(1 - 6x)(1 + 6x + 36x2) B. x(1 + 6x)(1 + 6x + 36x2) C. prime D. x(1 + 6x)(1 - 6x + 36x2)
Use the quadratic formula to solve the equation.
+ x + 
= 0
A. {-16 + 
}
B. {8 - 
, 8 + 
}
C. {8 + 
}
D. {-8 - 
, -8 + 
}
Provide an appropriate response.Which of the following properties do not hold for matrix multiplication?(i)Associative property(ii)Commutative property(iii)Distributive property(iv)Zero-factor property (If the product of two matrices is a zero matrix, then one of the factors must be a zero matrix.)
A. (i), (iii) B. (ii), (iv) C. (ii) D. None. All of the properties hold.