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Andreas93 [3]
3 years ago
14

Jake recorded a special album in honor of Mothers Day. His mom was so excited she purchased 40% of gthe copies in the store. She

has 80 copies of the CD. How many CD's did the store have for sale?
Mathematics
2 answers:
svp [43]3 years ago
4 0

The store had 200 copies

kicyunya [14]3 years ago
4 0
.40*80= 32 copies on sale.
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erastova [34]
<h3>Answer: 45</h3>

The value is approximate.

==========================================================

Explanation:

Focus on the upper triangle.

Label the unknown horizontal side as y

Use the pythagorean theorem to solve for y

a^2+b^2 = c^2

10^2 + y^2 = 26^2

100+y^2 = 676

y^2 = 676-100

y^2 = 576

y = sqrt(576)

y = 24

-----------

Now move to the bottom triangle

With respect to the reference angle, the side y = 24 is opposite this. The hypotenuse is unknown.

Use the sine rule to connect the two and solve for x

sin(angle) = opposite/hypotenuse

sin(32) = y/x

sin(32) = 24/x

x*sin(32) = 24

x = 24/sin(32)

x = 45.2899179551967 which is approximate

x = 45 rounding to the nearest whole number

Side x is approximately 45 cm long.

Note: make sure your calculator is in degree mode.

7 0
2 years ago
a grocery store earns 5% on all canned goods. if the store sold $1635 of canned goods, what was the profit?
Likurg_2 [28]

Answer: $817.50

Step-by-step explanation: i did maths

6 0
3 years ago
Find the value of c that makes each trinomial a perfect square.<br> x^2-13x+c
vova2212 [387]

Answer:

169/4

Step-by-step explanation:

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3 years ago
An airplane left Atlanta with 20 empty seats. If the airplane was 75% full, what was the total number of seats on the airplane?
jek_recluse [69]
Answer is <span>C. 80

hope that helps

75% are full with 20 seats empty so </span>20 seats empty = 25%

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denis23 [38]

Answer:

The value of f(2) is larger than the value of f(3).

Step-by-step explanation:

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3 0
2 years ago
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