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dangina [55]
3 years ago
14

Andy has a collection of movie dvds. in andys collection 3/5 of the dvds are action 1/4 of the dvds are comedy. andy said that 4

/9 of his collection is action or comedy. cynthia said that andy made an errer. explain wether andy is correct or incorect and why.
Mathematics
1 answer:
Lerok [7]3 years ago
4 0
If 3/5 are action and 1/4 are comedy then:

(3/5)+(1/4) are action or comedy

To add/subtract fractions you need a common denominator...

(3/5)*(4/4)+(1/4)(5/5)

(12/20)+(5/20)

17/20

So 17/20 (85%) of his collection are action or comedy not 4/9...


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The number 20 is no less than the difference of 4 times a number c and 8.
sammy [17]

Answer:

20 >= 4*c - 8

Step-by-step explanation:

5 0
2 years ago
Please show your work and check!!
ad-work [718]

Step 1. Add 6 to both sides

a ≥ 1 + 6

Step 2. Simplify 1 + 6 to 7

a ≥ 7

4 0
3 years ago
Read 2 more answers
Consider the numbers 0, 10, 20, 30, and 40. Multiply each by 4 and compare the result to 60 to determine into which of the follo
olya-2409 [2.1K]

Answer:

b) 10 to 20

Step-by-step explanation:

You have to multiply each of the given numbers by 4, and add 8 to that result.

So:

  • 0*4+8  = 8
  • 10*4+8 = 48
  • 20*4+8 = 88
  • 30*4+8 = 128
  • 40*4+8 = 168

And 60 is between the result of <u>10 and 20</u>, so that's the interval you have to select.

<em>The correct answer is b) 10 to 20</em>

3 0
3 years ago
I only need to know question b, if anyone can help
kicyunya [14]

243 liters represents 7/10 - 1/4 of the water.

v=243 / (7/10 - 1/4) = 243 / (14/20-5/20) = 243(20)/9 = 540 liters.

Answer: 540 liters

Check:

(7/10)(540) = 7(54) = 378

(1/4)540 = 135

difference = 378 - 135 = 243  good

5 0
3 years ago
For an angle Θ with the point (12, −5) on its terminating side, what is the value of cosine?
Pachacha [2.7K]
Given that the point (12,-5) which takes the form (x,y), This implies that:
opposite=-5
adjacent=12
thus using using Pythagorean theorem, the hypotenuse will be:
c^2=a^2+b^2
plugging the values we obtain:
c^2=(12)^2+(-5)^2
c^2=144+15
c^2=169
thus
c=13
but
cos θ=adjacent/ hypotenuse
therefore:
cos θ=12/13

Answer is option . D
5 0
3 years ago
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