Enter an inequality that represents the description, and then solve. Dave has $9 to spend on a $4 book and two birthday cards (c) for his friends. How much can he spend on
each card if he buys the same card for each friend?
Inequality:
Dave can spend up to $
on each card if he buys the same card for each friend.

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1

step-by-step explanation:

the true ones are a b and d