Answer:
False
Step-by-step explanation:
2cos^2(4x) - 1 = cos(8x)
cos(8 *pi/12) = cos(2pi/3) = cos(pi - pi/3) = - cos(pi/3)= 1/2, which is not 0
cos(8x) = 0
==> 8x = 0 or pi
==> x = 0 or pi/8
Okay. When it comes to multiplying decimals, you multiply them just like you would do whole numbers. However, solving them by paper, you would add a decimal point into the answer, depending on how many numbers are behind the decimal point in the numbers being multiplied. In this case, the decimal point will go in front of two numbers, because there are two numbers behind the decimal point in -1.2 and 0.4. Know that the answer will be negative, because there is one negative and one positive number.
Multiply both numbers. -1.2 * 0.4 is -0.48. There. The product is -0.48.
Ok so we can put this into terms as x. Eli is x. Sarah is 2x. Ashley is x+2x aka 3x. Hazel is 3*2x aka 6x.
Add them all up x+2x+3x+6x=888 aka 12x=888 divide 12 from each side. Gives you x=74
Eli travels 74 miles.
Sara travels 74*2 aka 148
Ashley travels 3*74 aka 222
Hazel travels 74*6 aka 444
Just add the same sides and angles
Answer:
its B y=e^x+3
Step-by-step explanation:
Mark me as brainliest!
