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butalik [34]
3 years ago
15

Help me please!! what is the solution set on x^2-10=30x?

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
5 0
X² - 30x - 10 =0

We are going to use formula
x=  \frac{-b+/- \sqrt{b^{2}-4ac} }{2a} 
\\ \\ a= 1, b=-30, c= - 10
\\ \\x= \frac{30+/- \sqrt{(-30)^{2}-4(1)(-10)} }{2} 
\\ \\ \frac{30+/- \sqrt{900+40} }{2}= \frac{30+/- \sqrt{940} }{2}=  \frac{30+/- \sqrt{235*4} }{2} = 15+/- \sqrt{235} 

Answer\ is\ C.
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C

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4y-2y=10

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When I did this problem I got 6(-g+f)
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4 years ago
Y = x - 2<br> -2x + 3y = -1 <br> What is x and y?
Sergio039 [100]

Answer:

(5, 3)

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination
  • Solving systems of equations by graphing

Step-by-step explanation:

<u>Step 1: Define systems</u>

y = x - 2

-2x + 3y = -1

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Substitute in <em>y</em>:                    -2x + 3(x - 2) = -1
  2. Distribute 3:                         -2x + 3x - 6 = -1
  3. Combine like terms:            x - 6 = -1
  4. Isolate <em>x</em>:                               x = 5

<u>Step 3: Solve for </u><em><u>y</u></em>

  1. Define equation:                    y = x - 2
  2. Substitute in <em>x</em>:                       y = 5 - 2
  3. Subtract:                                 y = 3

7 0
3 years ago
Calculate how long it would take an investment to triple if the interest rate is 10% compounded annually
nekit [7.7K]
3=(1.10)^t
Log(3)=t*log(1.10)
t=log(3)÷log(1.10)
t=11.5 years
5 0
3 years ago
Plz help me with this it's really important Riverside elementary school is holding a school-wide election to choose a school col
Alborosie
⅝ of the votes were for blue. That leaves ⅜ of the votes remaining. 5/9 of the remaining ⅜ votes were for green, so you multiply 5/9 x ⅜ = 15/72 votes for green. ⅝ of the votes were for blue, so you can multiply the fraction by 9/9 to get 45/72. So 45/72 votes were for blue, and 15/72 votes were for green. That leaves 12/72 votes remaining, which were for red. Since the question says 48 votes out of the total number of votes were for red, this means 48/v = 12/72 (v = the total number of votes). Cross multiply and solve for v to get v = 288. The fraction for blue is ⅝, so you can say x/288 = ⅝ (x = the number of votes for blue). Cross multiply and solve for x to get x = 180 votes for blue. 
8 0
3 years ago
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