An author is planning to attend a science fiction convention to promote her new book. There is a $50 registration fee to attend the convention. She plans to stay at a hotel with a daily rate of $105 and spend $30 on meals per day. Create an equation to represent her expenses, e, for the convention, based on the number of days, d, she will be in attendance. Use your equation to answer the foafowing question. How much will she spend to attend the convention for 3 days?

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step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

146

step-by-step explanation: