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MAXImum [283]
3 years ago
7

Area of a Circle This activity will help you meet these educational goals: Mathematical Practices—You will make sense of problem

s and solve them, reason abstractly and quantitatively, construct viable arguments and analyze the reasoning of others, and look for and express regularity in repeated reasoning. Directions Read the instructions for this self-checked activity. Type in your response to each question, and check your answers. At the end of the activity, write a brief evaluation of your work. Activity The diameter of each of the three circular lights in a traffic signal is 7 inches. In this activity, you will find the total area of the three lights. Part A Each circular light has a diameter of 7 inches. What is the radius of each light?​
Mathematics
1 answer:
Annette [7]3 years ago
8 0
Can someone tell me the answer
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Write the system in a matrix equation. Then, find the determinant of the matrix containing the coefficients.
Shtirlitz [24]

Answer:

See below for the matrix

D = 100

Step-by-step explanation:

\left[\begin{array}{cccc}3&2&1&-8\\-1&-2&4&7\\1&-6&-3&15\end{array}\right]

         3    2    1

D =   -1    -2    4    =   3(-2)(-3) + 2(4)(1) + 1(-1)(-6)  

         1    -6   -3

                                    - 1(-2)(1) - 3(4)(-6) - 2(-1)(-3)

                           =  18 + 8 + 6 + 2 + 72 - 6

                           =  100

Sorry, I can't type the vertical bars.

I hope this is what you are looking for.

   

5 0
3 years ago
William says that 15years from now his age will be 3 times his age 5 years ago if x represents williams present age complete the
Kay [80]

Answer:

Is the question complete

5 0
2 years ago
Find the value of cos E rounded to the nearest hundredth, if necessary. please help thanks
bonufazy [111]

Answer:

cos(E)=0.8

Step-by-step explanation:

cos(E)=adjacent/hypotenuse

Using a common pythagorean triple, we can find that side GE is 30 (18^2+24^2=30^2)

Then we just get cos(E)=24/30, which is 0.8

4 0
2 years ago
A cone has a radius of 10 cm and and height of 9 cm. What is the approximate volume of the cone? Use 3.14 for π.
astraxan [27]

Answer:

The volume of the cone is 942cm^3

Step-by-step explanation:

The given cone has a radius of 10 cm and and height of 9 cm.

The volume of a cone is given by:

V=\frac{\pi r^2h}{3}

We substitute r=10 and h=9 ,  \pi=3.14 to obtain:

V=\frac{3.14*10^2*9}{3}

Simplify exponents to get:

V=\frac{3.14*100*9}{3}

Simplify:

V=314*3\\V=942cm^3

Therefore the volume of the cone is 942cm^3

8 0
3 years ago
Find the points<br> that go in<br> between (-4,7)<br> and (6,5)
Marina CMI [18]
The point in between is (1,2)
7 0
3 years ago
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