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Afina-wow [57]
3 years ago
8

Natalia goes to the bookstore with $25.00. She buys 4 magazines for $3.25 each and a comic book for $5.75. How much money does s

he have left?
Select the correct expression.

A.
25 – (4 • 3.25 + 5.75)

B.
25 – 3(3.25 + 5.75)

C.
25 – 3.25 – 5.75

D.
25 – 3 • 3.25 + 5.75
Mathematics
2 answers:
Andrew [12]3 years ago
6 0

Answer:

a

Step-by-step explanation:

Alenkasestr [34]3 years ago
3 0
A. 25-(4*3.25+5.75)

Since each of the 4 magazines are 3.25 cents you would need to multiple 3.25 by 4 and equation a is the only equation that does that
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gavmur [86]
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3 years ago
Which relationship is true for the triangle based on the Law of Sines?
Marta_Voda [28]

Answer:

We know the  angle given refers to the length of the opposite side.

Given angle = 82 and the opposite side = 34 so part of the  relationship is

sin 82 / 34 = sin (  ) / ( )

We are also given one side = 27 and that side is opposite angle at C

so that part of the relationship is   sin C / 27

sin 82 / 34 = sin C / 27

3 0
3 years ago
A.) The formula for the volume of a sphere is given below and the relationship between the radius r and the diameter d is r=d/2.
Tasya [4]

Answer:

\displaystyle V=\frac{4}{81}\cdot \pi\ cm^3

Step-by-step explanation:

<u>The Volume of a Sphere </u>

The volume of a sphere of radius r is given by:

\displaystyle V=\frac{4}{3}\cdot \pi\cdot r^3

A. )

If the diameter of the sphere is d, the radius is r=d/2. Substituting:

\displaystyle V=\frac{4}{3}\cdot \pi\cdot \left (\frac{d}{2}  \right )^3

Operating

\displaystyle V=\frac{4}{3}\cdot \pi\cdot \frac{d^3}{8}

Simplifying

\displaystyle V=\frac{1}{6}\cdot \pi\cdot d^3

B.)

The diameter of the sphere is 2/3 cm, thus the volume is:

\displaystyle V=\frac{1}{6}\cdot \pi\cdot \left (\frac{2}{3}  \right )^3

Operating:

\displaystyle V=\frac{1}{6}\cdot \pi\cdot \frac{8}{27}

\displaystyle V=\frac{8}{27}\frac{1}{6}\cdot \pi

\boxed{\displaystyle V=\frac{4}{81}\cdot \pi\ cm^3}

8 0
3 years ago
What is the value of f(x) when x = 4 in the piecewise function f(x) = 2x² when x&gt;4
zepelin [54]

Answer:

16

Step-by-step explanation:

f(x) = 2x² when x>4

We cannot use this expression of f to calculate f(4)

because ,this expression define f for the value of x

that are greater (not equal) than 4.

………………………………………………………

f(x) = 4x when x ≤ 4 , here x is can be equal to 4

(notice the sign ≤ )

Therefore

f(4) = 4 × (4) = 16

6 0
2 years ago
Let the cp be rs x. if a man gains 20% profit by selling an article for rs 816. find cp​
katen-ka-za [31]

Answer:

Let, the c.p be x.

Given,

profit % = 20%

S.P = rs 816

c.p = x

We know,

profit = p% of c.p

         = \frac{20}{100} * x

         = \frac{x}{5}

now,

   C.p = profit + s.p.

        x = \frac{x}{5} + 816

        x = \frac{x+ 4080}{5}

       5x = x + 4080

       5x-x = 4080

       4x = 4080

         x = \frac{4080}{4}

         x = Rs 1080

Hence, the c.p is Rs. 1080

8 0
3 years ago
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