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Iteru [2.4K]
3 years ago
11

At a certain location the number of hours of sunlight is modeled by y=6.4cos(pi/26x)+12, where x represents the number of weeks

after the summer solstice. Based on the model, what is the minimum number of hours of sunlight at this location?
3.2
5.6
6.4
13.0
Mathematics
1 answer:
scZoUnD [109]3 years ago
4 0

Answer: 5.6

Step-by-step explanation:

trintrin
2 years ago
How you get that answer?
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Math help @LIEMONDER
klio [65]
First picture)
I: 5x+2y=-4
II: -3x+2y=12

add I+(-1*II):
5x+2y-(-3x+2y)=-4-12
8x=-16
x=-2

insert x=-2 into I:
5*(-2)+2y=-4
-10+2y=-4
2y=6
y=3

(-2,3)

question 6)
I: totalcost=115=3*childs+5*adults
II: 33=adults+childs
33-adults=childs

insert childs into I:
115=3*(33-adults)+5*adults
115=99-3*adults+5*adults
16=2*adults
8=adults

insert adults into II:
33-8=childs
25=childs

so it's the last option

question 7)
a) y<6 and y>2 can also be written as 2<y<6, so solution 3 exist for example
b) y>6 and y>2 can also be written as 2<6<y, so solution 7 exist for example
c) y<6 and y<2 inverse of b: y<2<6, so for example 1
d) y>6 and y<2: y<2<6<y, this is impossible as y can be only either bigger or smaller than 2 or 6

so it's the last option

question 8)
I: x+y=12
II: x-y=6

subtract: I-II:
x+y-(x-y)=12-6
2y=6
y=3

insert y into I:
x+3=12
x=9

(9,3)

question 9)
I: x+y=6
II: x=y+5

if you take the x=y+5 definition of II and substitute it into I:
(y+5)+y=6

which is the second option :)
5 0
3 years ago
262 diveded by 2.5 please help
vodka [1.7K]

Answer:

The answer is 104.8

Step-by-step explanation:

Calculator

5 0
2 years ago
Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
elena-14-01-66 [18.8K]
It does match-
The Y-Intercept is 12
And the slope is -3/1

You can confirm this by counting rise over run in the graph
Starting at the Y-Intercept (Y=12) the graph goes down 3 units (-3) over 1 unit (1)
This confirms that the slope is -3/1
3 0
3 years ago
The point of concurrency of the angle bisectors of a triangle is called the _____
Kitty [74]

Answer:

centroid

Step-by-step explanation:

8 0
3 years ago
Is the following relation a function? <br><br> A. Yes<br> B. No
anzhelika [568]
B.No
I think so it it not a function.
Hope it helps.....
3 0
3 years ago
Read 2 more answers
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