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Lemur [1.5K]
3 years ago
7

Abdul is mailing packages. Each small package costs him $2.50 to send. Each large package costs him $3.20 . How much will it cos

t him to send 6 small packages and 1 large package?
Mathematics
1 answer:
Svetllana [295]3 years ago
4 0
$18.20 is your answer.
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How do I solve this
Sergio [31]

Answer:

9(c^7)

Step-by-step explanation:

\frac{ 9c^{3} }{c^{-4} }=\\9c^{3} * c^{4}=\\9c^{7}

c^-4 is equal to 1/(c^4), so 1/(c^(-4)) is c^4.

6 0
3 years ago
What is the surface area of the cube below? 9 9 9
Natali5045456 [20]

Answer:

A_s=486\ units^2

Step-by-step explanation:

Remember that the sides of a cube always have the same length.

In this case the length of the sides L is:

L = 9.

The cubes have 6 faces. Then the surface area of the cube is equal to the area of its 6 faces.

Since all sides of the cube have the same measure, then the area of each face is:

A = L ^ 2

Then the area of the 6 faces is:

A_s = 6L ^ 2

A_s = 6 * (9 ^ 2)

A_s=486\ units^2

3 0
3 years ago
If cos (A) = 1/2 with A in QIV, find sec (A/2).
Ludmilka [50]
If A is QIV, then        3π/2 ≤A≤2π; 
we have to find out in what quadrant is A/2
          (3π/2)/2≤A/2≤(2π)/2 ⇒ 3π/4≤A/2≤π
We can see that A/2 will be in QIII; therefore the sec (A/2) will be negative (-).

1) we have to calculate cos (A/2)
Cos (A/2)=⁺₋√[(1+cos A/2)/2]
We choose this formula: Cos (A/2)= -√[(1+cos A/2)/2],  because sec A/2 is in quadrant Q III, and the secant (sec A/2=1/cos A/2) in this quadrant is negative.

Cos (A/2)=-√[(1+cos A)/2]=-√[(1+(1/2)]/2=-√(3/4)=-(√3)/2.

2) we compute the sec (A/2)
Data:
cos (A/2)=-(√3)/2

sec (A/2)=1/cos (A/2)
sec (A/2)=1/(-(√3)/2)=-2/√3=-(2√3)/3

Answer: sec (A/2)=-(2√3)/3
6 0
4 years ago
Use the graph to determine the domain and range of the relation, and whether the relation is a function
MAVERICK [17]

domain is correct for b and c

the graph is a function because each value of x has only one y value

hence answer is B

8 0
4 years ago
-35--5<br> please help this is hard
ololo11 [35]

Answer:

-30

Step-by-step explanation:

8 0
3 years ago
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