How am I supposed to do this Polynomial Question?!

(7a^5-3a^3+5) - (-2a^5-4a^3+13)

I have tried it multiple getting the same wrong answer.

Tickets to a local movie were sold $5 for adults and $3.50 for students. If 209 tickets were sold for a total of $1031.50, how many of each type of ticket were sold?

the number 1 through 10 are written on individual cards and placed in a bag. if you reach into the bag and pull out a card, whats the probability taht it will be a 7?

Kai calculates that he spends 15% of the school day in science class. If he spends 42 minutes in science class, how many minutes does Kai spend in school each day? Can someone tell me how to do that with fractions and cross products or something

Solve the equation 2x² + 2x + 12 = 3x² - x + 2. A. x = - 5, x = - 2 B. x = 2, x = - 5 C. x = 2, x = 5 D. x = - 2, x = 5

STOP! width = 36 cm length = 24 cm- What would be the dimensions of the poster at 1/4 times its current size? Length = 96 cm, width = 144 cm Length = 6 cm, width = 9 cm Length = 20 cm, width = 32 cm Length = 28 cm, width = 40 cm

How do I write 88.691 as a mixed number?

Which of the following transformations will always produce a congruent figure? * A contraction B reflection C expansion D dilation

How many times does 3 fit in 50

Assets + liabilities = owner's equity is the fundamental bookkeeping equation. True False

Find the values of the six trigonometric functions of theta based on the following constraints: 1.) Theta is found in quadrant II. 2.) sin theta = 3/5