For the verbal description of a function, write a formula for f.Function f multiplies the input x by 3 and then subtracts 4 from the result to obtain the output y.
A. f(x) = 4x + 3
B. f(x) = 3x + 4
C. f(x) = 3x - 4
D. f(x) = 4x - 3
Answer: C
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Find the mean. Round to the nearest tenth unless otherwise stated.Gallons of gasoline: 5, 14, 14, 3, 14 (Do not round.)
A. 10 B. 51 C. 9 D. 12.5
Find all solutions of the equation. Leave answers in trigonometric form.x4 + 16 = 0
A. {
cis 45°, 
cis 315°, 
cis 135°, 
cis 225°}
B. {16 cis 45°, 16 cis 315°, 16 cis 135°, 16 cis 225°}
C. {
cis 26.565°, 
cis 333.435°, 
cis 153.435°, 
cis 206.565°}
D. {2 cis 45°, 2 cis 315°, 2 cis 135°, 2 cis 225°}
Use the cofunction and reciprocal identities. Round to the nearest ten-thousandth when appropriate.Given that sin 78.8° ? 0.9810, cos 78.8° ? 0.1942, and tan 78.8° ? 5.0504, find the six function values of 11.2°.
A. sin 11.2° ? 5.1493; cos 11.2° ? 0.1942; tan 11.2° ? 0.1980 csc 11.2° ? 0.9810; sec 11.2° ? 1.0194; cot 11.2° ? 5.0504 B. sin 11.2° ? 0.9810; cos 11.2° ? 0.1942; tan 11.2° ? 0.1980 csc 11.2° ? 1.0194; sec 11.2° ? 5.1493; cot 11.2° ? 5.0504 C. sin 11.2° ? 0.1942; cos 11.2° ? 0.9810; tan 11.2° ? 0.1980 csc 11.2° ? 5.1493; sec 11.2° ? 1.0194; cot 11.2° ? 5.0504 D. sin 11.2° ? 5.1493; cos 11.2° ? 0.1942; tan 11.2° ? 0.1980 csc 11.2° ? 1.0194; sec 11.2° ? 0.9810; cot 11.2° ? 5.0504
Use a graphing calculator to determine which of the following expressions asserts an identity.2 
= ...
A. 2 cosx + 2 sin x B. 2 cos 2x C. 2 D. 2 cos x - 2 sin x