The second derivative of sin2x is d/dx(sin 2x) = 2 cos 2x.
Answer: $312.5
Step-by-step explanation:
Lily spent one-fifth of her salary on a pair of shoes and then got $90 as a birthday present from her mom and was left with $340. To calculate the amount Lily had at first goes thus:
Since Lily spent 1/5 on shoes, that means she had (1 - 1/5) = 4/5 left.
Let the amount she had at first be y.
(4/5 of y) + 90 = 340
(4/5 × y) + 90 = 340
0.8y + 90 = 340
0.8y = 340 - 90
0.8y = 250
Divide both side by 0.8
0.8y/0.8 = 250/0.8
y= 312.5
She had $312.5 at first.
y = mx + p
p = - 7 since the line cuts the y-axis in -7
and m the slope ?
we choose 2 points (-2 ; 0) and (0 ; - 7)
we move of 2 units towards the left to go down of 7 units
=> m = - 7/2
y = - 7/2x - 7
or
y = -3,5x - 7
baloon poodle requires 1 and giraffe requires 3 balloons.
i really hope this is the correct answer, sorry if I'm wrong.
if you want/need an explanation you can ask me and I'll explain how i did it
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