Tom is trying to make some extra money, after school, by tutoring Spanish, s, and Calculus, c. He charges $25 per hour for Spanish and $35 per hour for Calculus. Which inequality can be used to find all the possible ways Tom can earn money if he wants to earn at least $100 per week?

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81

stock holders gave company a contract to lay tack to 2 to 3 times actual cost and pocketed profits

-took $23 mill in stocks