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MrMuchimi
3 years ago
10

Find the area of the polygon. 7 cm 20 cm 16 cm

Mathematics
1 answer:
lana [24]3 years ago
7 0

Answer:

140

Step-by-step explanation:

sorry if wrong!

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3) The foot of a ladder is 1.2 m from a fence
VashaNatasha [74]

Answer: 4.5\ meters

Step-by-step explanation:

Using the data given in the exercise, we can draw the diagram attached, where "h" is the height of the building reached by the top of the ladder.

Notice that there are two similar triangles.

So, you can set up the following proportion:

\frac{1.8}{1.2}=\frac{h}{(1.2+1.8)}

Finally, in order to calculate the height on the building reached by the top of the ladder, you must solve for "h".

Therefore, the value of "h" is :

\frac{1.8}{1.2}=\frac{h}{3}\\\\(3)(\frac{1.8}{1.2})=h\\\\\frac{5.4}{1.2}=h\\\\h=4.5

5 0
3 years ago
The diameter of a circle is 10 units.<br> What is the radius of the circle?
Mekhanik [1.2K]

Answer:

Radius = 5 units

Step-by-step explanation:

Diameter of a circle = 10

Radius = diameter/2

Radius = 10/2

Radius = 5 units

5 0
3 years ago
Read 2 more answers
Find the point on the graph of the given function at which the slope of the tangent line is the given slope.
mezya [45]

Answer:

A ( -2 , 9 )

Step-by-step explanation:

<u>Idea:</u> You find the first derivative of f(x), and then set it equal to the desired slope. You'll find some x. That we will use to find the point.

f'(x) = 3x^2 + 12x + 20

f'(x) = 8

3x^2 + 12x + 20 = 8

3x^2 + 12x + 12 = 0

3 ( x^2 + 4x + 4 ) = 0

3 ( x + 2 )^2 = 0

x + 2 = 0

x = -2

So, the desired point is:

A ( -2, f(-2) ) --> A ( -2 , 9 )

3 0
3 years ago
Find the total surface area of the rectangular prism 7.1 2.8 3.2
krek1111 [17]

lol

Step-by-step explanation:

5 0
3 years ago
el exceso del triple de un número sobre 6 es igual al doble del numero aumentado en 18 ¿Cuál es el número?
yuradex [85]
Esta pregunta obtendría una mejor ayuda si estuviera en español.
8 0
3 years ago
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