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Llana [10]
3 years ago
13

8. Bob bought a pair of tennis shoes on sale

Mathematics
1 answer:
mr_godi [17]3 years ago
4 0

Answer:

20%

Step-by-step explanation:

So, I would set this up as a proportion-

72          x

90        100

Cross multiply-

100 x 72 = 7200

Divide-

7200/90 = 80

Subtract-

100 - 80 = 20

So, it is a 20% decrease

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The answer is B on multiple choice
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2 years ago
Enter the value of w so the expression -5 +0.6W is equivalent to w (2.5 – 0.3w)​
NeX [460]

9514 1404 393

Answer:

  w = -2 or 8 1/3

Step-by-step explanation:

Setting the two expressions equal makes a quadratic equation:

  -5 +0.6w = w(2.5 -0.3w)

  0.3w^2 -1.9w -5 = 0 . . . . . . subtract the right-side expression

  3w^2 -19s -50 = 0 . . . . . . . multiply by 10 to give integer coefficients

  (3w -25)(w +2) = 0 . . . . . . . factor

We can use the zero product rule to find the solutions. The product will be zero only if a factor is zero.

  3w -25 = 0   ⇒   w = 25/3 = 8 1/3

  w +2 = 0   ⇒   w = -2

The values of w that make the two expressions equivalent are -2 and 8 1/3.

8 0
3 years ago
What is the difference between the rational expressions below? 3x+1/x^2-5/x
Tom [10]

Answer:

(3x^2-5x-5)/(x^2+x) <--- answer  

Step-by-step explanation:

3x/(x+1) - 5/x = (3x^2 - 5(x+1) )/[ x(x+1) ]  

= (3x^2 - 5x - 5)/(x^2 + x)

5 0
3 years ago
I need help please. Thank you.
AfilCa [17]
The answers are C and B.
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8 0
2 years ago
2. At the bike shop, Jason is buying a new bike that costs $215. If the sales tax rate in his state is 7%, how much tax will Jas
Usimov [2.4K]

Answer:

Jason will pay $50.05 in taxes

Step-by-step explanation:

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3 years ago
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