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hjlf
3 years ago
8

Math heeeeellllloppp

Mathematics
1 answer:
trasher [3.6K]3 years ago
3 0
 Well see that to find g 180130=50. To find h we know that all triangles add up to 180 so 20+130=150. 180-150=30. so h equals 30. And fianly we also use the same trick to find f= 60+50=110. 180-110= 70. Soooo: h=30, f=70, g=50
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Solve the divison problem (-1 3/5) / (-2/3) as a mixed number
Vitek1552 [10]

Answer:

2\frac{2}{5}

Step-by-step explanation:

<h2> (-1 3/5) / (-2/3) =\frac{12}{5}</h2><h2>\frac{12}{5}=2\frac{2}{5}</h2>
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Find the average rate of change of f(x)=-x2+2x+2 from x=2 to x=6
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What are the center and the radius of a circle with the equation (x + 5)² + (y - 4)² = 81
Alexeev081 [22]

Step-by-step explanation:

We know that if the equation of the circle is (x-h)^2 + (y-k)^2 = r^2, it has a center of (h,k) and a radius of r.

Matching this up with the given equation, we get the center is (-5, 4) and the radius is 9.

6 0
2 years ago
Consider the first four terms of an arithmetic sequence below.
VMariaS [17]
7, 13, 19 and 25 have a common difference:  6.  
6 added to 7 gives us 13; 6 added to 13 gives us 19, and so on.

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The second term is a(2) = 7 + 6(2-1), or 7 + 6, or 13.  This corresponds to n = 2.

and so on.


6 0
3 years ago
Previously, an organization reported that teenagers spent 24.5 hours per week, on average, on the phone. The organization thinks
Lena [83]

Answer:

We need to develop a one-tail t-student test ( test to the right )

We reject H₀  we find evidence that student spent more than 24,5 hours on the phone

Step-by-step explanation:

Sample size  n = 15     n < 30

And we were asked if the mean is higher than, therefore is a one-tail t-student test ( test to the right )

Population mean   μ₀  = 24,5

Sample mean   μ  =  25,7

Sample standard deviation s = 2

Hypothesis Test:

Null Hypothesis      H₀                             μ  =  μ₀

Alternative Hypothesis     Hₐ                  μ  >  μ₀

t (c) =  ?

We will define CI = 95 %  then   α = 5 %   α = 0,05    α/2 =  0,025

n = 15     then degree of freedom    df = 14

From t-student table  we get:  t(c) = 2,1448

And  t(s)

t(s) = ( μ  -  μ₀  ) / s/√n

t(s) = (25,7 - 24,5) /2/√15

t(s) = 2,3237

Now we compare   t(c)   and  t(s)

t(c)  =  2,1448         t(s)  = 2,3237

t(s) > t(c)

Then we are in the rejection region we reject H₀   we have evidence at 95% of CI that students spend more than 24,5 hours per week on the phone

8 0
3 years ago
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