Maria started with 37 boxes.
Given:
7 boxes bought
half of the boxes were destroyed in the fire.
22 boxes left
Find the beginning number of boxes.
Let x be the beginning number of boxes.
(x + 7)/2 = 22
2((x+7)/2) = 2(22)
x + 7 = 44
x = 44 - 7
x = 37
To check:
x + 7 = 37 + 7 = 44
44 * 1/2 = 22
22 = 22
Answer:
Step-by-step explanation:
Here,
Before the outbreak, the average wait time at the hospital was m minutes,
Also, after outbreak it is increased by 70 %,
So, the average wait time at the hospital after the outbreak = The average wait time before outbreak + 70 % of the average wait time before outbreak
= m + 70 % of m
Hence, the expressions could represent the average time at the hospital after the outbreak would be,
Answer:
You can delete my answer I just want points
Step-by-step explanation:
The amplitude is 2, so A = 2 (see note 1 below)
The period is T = pi/2 which means
B = 2pi/T
B = 2pi/(pi/2)
B = 2pi*(2/pi)
B = 4
The phase shift is C = pi/4
The midline is y = -3 indicating that D = -3
Put this all together and we go from this (see note 2)
y = A*sin(B(x-C)) + D
to this
y = 2*sin(4(x-pi/4)) + (-3)
and that simplifies to
y = 2sin(4x-pi) - 3
which is one way to write the final simplified answer (see note 3)
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Extra Stuff:
Note 1: The value of A can be A = -2. Recall that the amplitude is equal to |A|. So If A = -2, then |A| = |-2| = 2. The amplitude is the vertical distance from the midline to the peak or valley. Distance can't be negative. To make things simple, I went with A = 2.
Note 2: The general formula involving sine can be replaced with cosine instead. The cosine function is basically sine but a phase shift of it (it has the same shape and pattern, but has been moved over). You cannot use tangent as that is a completely different class of function.
Note 3: I distributed the 4 through to the (x-pi/4) to get 4x-pi. Your teacher or book may want you to keep things factored and not distribute. If so, then the answer would be y = 2sin(4(x-pi/4)) - 3. That is of course you went with using sine instead of cosine. The benefit of not distributing is that we can more easily see what the phase shift is.