exam Maths Puzzle Numerical Ability

a clown is preparing for a party by inflating 1 balloon for each invited guest
when she gets half the needed balloons done 3 of them pop she inflates 5 more and 2 pop then 6 ballo

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i need help with (2k+1)7. this is distributive property. its usually a number in front of the parenthesis but for this particular problem there is not so i am really confused 7.) Solve
0.5x + 4 is less than and equal to 1.3 - 3

The solution is {x l x ____ ____}

Find the indicated outputs for f(x) = 5x(2 exponent) - 2x

f(0) =

f(-1) =

f(2) =