Is the set of even natural numbers closed for the operation of multiplication?Answer yes or no.
What will be an ideal response?
yes
Mathematics
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Convert the rectangular equation to polar form.x2 + y2 - 4x = 0
A. r sin2? = 4 cos ? B. r cos2? = 4 sin ? C. r = 4 sin ? D. r = 4 cos ?
Mathematics
Simplify by using the order of operations. Round your answer to the nearest hundredth, if necessary.43.6 - 4.1 ? 7.5
A. 12.85 B. 32.0 C. 148.01 D. 312.00
Mathematics
Find the x- and y-intercepts of f.f(x) = -x2(x + 2)(x2 + 1)
A. x-intercepts: -2, -1, 0, 1; y-intercept: 0 B. x-intercepts: -2, -1, 0; y-intercept: 2 C. x-intercepts: -2, 0; y-intercept: 0 D. x-intercepts: -2, -1, 0; y-intercept: -2
Mathematics
Find the exact value of the expression. Do not use a calculator.sin 135° - sin 270°
A. 
B. 2
C. 
D. 
Mathematics