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irina [24]
3 years ago
10

160 feet of lumber at $2.49 per foot

Mathematics
1 answer:
MissTica3 years ago
7 0

Answer:

$398.4

Step-by-step explanation:

160x$2.49=398.4

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Solve for:-9a = 27 <br> please someone help!!!
myrzilka [38]

Answer:

a = -3

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6 0
3 years ago
What is the area of the composite figure?
7nadin3 [17]
Divide the figure into 3 shapes
top square
middle trapezoid
bottom rectangle

so
Area of figure 
= (10x10) + 1/2(8 + 14)(4) + (20 x 6)
= 100 + 44 + 120
= 264

answer
264 cm^2
4 0
3 years ago
Read 2 more answers
The rectangular coordinates of a point are given. Find the polar coordinates ​(r,theta​) of this point with theta expressed in r
alexandr402 [8]

Answer:}

In polar coordinates P is

P  ( 12 ; 2.618 )  

Step-by-step explanation:

The point (ectangular coordinates)  

P ( -6√3  ;   6 )       P  (  x ; y )

Polar coordinates   P ( r  ;  θ )

x = r cos θ

y = r sin θ                  r > 0    and     0  ≤ θ ≤ 2π

Then

r  =  √ (x)² + (y)²        r  =  √(36)²*3 +( 36)²       r = √144

r  =  12   (hypothenuse module always positive)

The point   P  ( -6√3  ;   6 )   is in second cuadrant  between 90° and 180°

angle between  r  and horizontal axis x  is equal to θ

tan α =  l.opp/ l.adj.    tan θ =  y/x       tan θ = - 6 /6√3

tan α = - 1/√3

Then α  =  180⁰ - 150⁰  = 30⁰  or     θ =  150⁰

to express that value in radians we have :

1 π radian      =   180⁰         ⇒   3,1416   radians  =  180⁰

                                                      x ??                  =   150⁰

x =  radians

Finally the point is   P  ( 12 ; 2.618 )  

6 0
2 years ago
Help me please !!! Determine the measure
Crank

Answer:

Step-by-step explanation:

3 0
2 years ago
Find the area of the trapezoid.
ycow [4]
11 in - 7 in = 4 in
a^2 + (4 in)^2 = (5 in)^2
a^2 + 16 in = 25 in
a^2 = 9 in
a = 3 in
7 in x 3 in = 21 in
1/2( 3 in ) ( 4 in ) = 6 in
a = 21 in + 6 in = 27 in
7 0
3 years ago
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