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nevsk [136]
3 years ago
11

How to make 4 1/5 as a decimal?

Mathematics
1 answer:
ladessa [460]3 years ago
5 0

Answer:

4.2

Step-by-step explanation:

Because 1/5 has to be converted into the 100 as the denominator and the number you are supposed to have for the numerator so it can be easier and 4 is the whole number so it doesnt need to be in the equation.

1/5

X

20= 20/100  so now all you have to do is make that a decimal since it hasnt got to 100 or past it and you have your answer

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If cos x= 5/13 and sin x <0 find cos (x/2) and sin (2x)
taurus [48]
We know that

if cos x is positive
and
sin x is negative
so
the angle x belong to the IV quadrant

cos x=5/13
we know that
sin²x+cos²x=1-------> sin²x=1-cos²x------> 1-(5/13)²---> 144/169
sin x=√(144/169)-------> sin x=12/13
but remember that x is on the IV quadrant
so
sin x=-12/13

Part A) <span>cos (x/2)
cos (x/2)=(+/-)</span>√[(1+cos x)/2]
cos (x/2)=(+/-)√[(1+5/13)/2]
cos (x/2)=(+/-)√[(18/13)/2]
cos (x/2)=(+/-)√[36/13]
cos (x/2)=(+/-)6/√13-------> cos (x/2)=(+/-)6√13/13
the angle (x/2) belong to the II quadrant
so
cos (x/2)=-6√√13/13

the answer Part A) is 
cos (x/2)=-6√√13/13

Part B) sin (2x)
sin (2x)=2*sin x* cos x------> 2*[-12/13]*[5/13]----> -120/169

the answer Part B) is 
sin(2x)=-120/169
4 0
3 years ago
Does 4/6 have equal parts
Svet_ta [14]

Answer:

yes

Step-by-step explanation:

4/6 of 100 = 66.6666666667

6 0
3 years ago
Explain why three-dimensional graphs can be misleading. What would be a better type of graph to
scoundrel [369]

three-dimensional graphs wouldn´t give you the right information but two-dimensional graphs would give you the actual size of the shape.

6 0
3 years ago
If p(x) = x^2 + 7x + 3 is divided by x + 4, the remainder is <br> a0
Sphinxa [80]
Hope this helps you!

4 0
3 years ago
A line intersects the points (-14,-10) and (7,5). find the slope of the line and simplify
Tpy6a [65]
The slope of any line can be calculated using the following rule:
slope = (y2-y1) / (x2-x1)

The given points are (-14,-10) and (7,5), therefore:
y2 = 5
y1 = -10
x2 = 7
x1 = -14

Substitute with these values to get the value of the slope as follows:
slope = (5--10) / (7--14) = 5/7
5 0
3 years ago
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