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-Dominant- [34]
3 years ago
7

Notebooks cost a $1.20 each this week and they will be on sale for $0.80 what percentage is the sale

Mathematics
2 answers:
ozzi3 years ago
6 0

We can use algebra.

So, what rate time 1.20 = .80


Let x = the rate (in a decimal form)

1.20x = .80

x = .6666666666

Now, we need to multiply by 100 to get a percentage.

66.66 The price is 66% of the regular price.


They marked it off

33.33%

zimovet [89]3 years ago
5 0

The answer to you question is 2/3 or 67%

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zaharov [31]
Equation : (7x-4)+(3x-3)+(x) = 180
In the equation the sum of the internal angle in the triangle is 180 degrees. Use this equation to figure the sum of angle in any quadrilateral 180*(number of sides-2)
Solve the equation
Put all similar variable on one side
7x+3x+x-4-3=180
11x-7=180
11x=180+7
11x=187
x = 187/11
x = 17
Now find the angles by plugging in x
Angle F (7*17-4) = 115 degrees
Angle G (x) = 17 degrees
Angle E (3*17-3) = 48 degrees
If you add 115+48+17 you will get a sum of 180 this shows your answer is right


Angle F = 115
Angle G = 17
Angle E = 48
4 0
2 years ago
What are the solutions for x when y is equal to 0 in the quadratic function y=x^2-8x
Elena L [17]
I would use the quadratic formula for this:

  x = -b ± √b² - 4ac over 2a
  x = 8 ± √64 - 4(1)(0) over 2(1)
  x = 8 ± √64 over 2
  x = 8 <span>± 8 over 2 [simplify]
  x = 4 </span><span>± 4
     x1 = 4 + 4    x2 = 4 - 4
     x1 = 8          x2 = 0


Thus, the solutions for x would be 0 and 8.</span>
5 0
3 years ago
Hurry please!<br> Find the slope <br> A. -3/5<br> B. 3/5<br> C. -5/3<br> D. 5/3
IceJOKER [234]

Answer:

\frac{5}{3} should be correct!

Step-by-step explanation:

6 0
2 years ago
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Goryan [66]

Let's say this number is a:
a*(a-9) = 90
a^2-9a-90 = 0
(a-15)(a+6) = 0
a = 15 or a = -6
Therefor a. would be the correct answer :)
7 0
3 years ago
How many Solutions does p + 9 = 2p - 3 have?
Artist 52 [7]

Answer:

P=12

Step-by-step explanation:

7 0
3 years ago
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