<span><span><span>2x </span>+ 7 </span>= <span><span>x + x </span>+ 7 is an example of an equation with an infinite number of solutions, meaning any number could be the answer.
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<span>Curtis
threw 15 darts at a dartboard. 40% of his darts hit the bull's-eye.
Let’s find out how many darts did not hit the bull's-eye.
=> 15 darts = 100%
=> 40% of 15 hits bull’s eye.
Now let’s solve:
=> 40% / 100% = .40
we need to get the 40% value of 15 to know how many darts was able to hit bull’s
eye.
=> 15 * .40 = 6 darts
Thus, out of 15, 6 of the darts hit bull’s eye,.</span>
F(X) = 2x + 1
Replace f(x) with y:
Y = 2x+ 1
Switch variables:
X = 2y + 1
Solve for Y:
Subtract 1 from both sides:
X- 1 = 2y
Divide both sides by 2:
X-1 / 2 = y
Rewrite so y is in the left side:
Y = x-1 / 2
Replace y with f^-1(x):
F^-1(x) = x-1 / 2
This can also be written as x/2 - 1/2
P = price of tickets
8.50p = 42.50
you then divide 8.50 on both sides
8.50p = 42.50
——— ———
8.50 8.50
p = 5
meaning Allison bought 5 tickets in total.
