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Elis [28]
3 years ago
15

What is 5r^2 = 80 It says solve each equation with the quadratic formula.

Mathematics
1 answer:
katovenus [111]3 years ago
5 0
5r^2 = 80 \ \ /:5\\ \\r^2=\frac{80}{5}\\ \\r^2=16\\ \\r^2-16=0\\ \\ r^2 - 4^2 =0 \\ \\(r-4)(r+4)=0

r-4=0 \ \ \vee \ \ r+4 =0 \\ \\r=4 \ \ \vee \ \ r = -4 \\ \\ \\ a^2-b^2 = (a- b)(a+b)


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Help would be greatly appreciated :)
Anton [14]
The bottle of 100 would be lowest. $8.13 ÷ 100 lozenges = $0.08 per lozenge

7 0
3 years ago
How do I solve this??
pshichka [43]
Well, first you should make both sides of the equation to the power of 2. 
So, you'll have 7X = 1225, and then X is 175 :)

Have a wonderful day! 
6 0
2 years ago
5+68empty space, 5, plus, 68 =(3+=(3+equals, left parenthesis, 3, plus 5 )+ 68)+68right parenthesis, plus, 68 =3 + (=3+(equals,
hoa [83]

Answer:

Give me and example

Step-by-step explanation:

6 0
3 years ago
Which of the following illustrates how to find the difference of 4h^5k and -7hk^5
MrRa [10]

Answer:

Not possible

Step-by-step explanation:

Which of the following illustrates how to find the difference of 4h^5k and -7hk^5

Takig the difference

4h^5k - (-7hk^5)

= 4h^5k +7hk^5

Collect the like terms

= hk(4h^4+7k^5)

Hence the difference is not possible

7 0
3 years ago
find the simple interest on 10000 from 1 July to 12 september 2007 at 5% per year calculate the interest​
rusak2 [61]

Answer:

Simple interest: 83.33, Final amount: 10083.33

Step-by-step explanation:

you dont get a explanation >:)

6 0
3 years ago
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