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Ede4ka [16]
1 year ago
9

5. Solve for x using any method you'd like. Round to the hundredth. Show all your work. (2 points each) d. 20x^3 = 7x^5

Mathematics
1 answer:
Sindrei [870]1 year ago
6 0

Solving this equation for x, we have:

\begin{gathered} 20x^3=7x^5 \\ 7x^5-20x^3=0 \\ x^3(7x^2-20)=0 \\ \begin{cases}x^3=0\to x=0 \\ 7x^2=20\to x=\pm\sqrt[]{\frac{20}{7}}\end{cases} \end{gathered}

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Andrew borrowed $700 from the bank to start a pressure washing business. The bank charged a simple interest rate of 7% per year.
Ede4ka [16]

Answer:

  • $147

Step-by-step explanation:

<u>Given:</u>

  • Loan amount = $700
  • Interest rate = 7% simple
  • Time = 3 years

<u>Interest amount:</u>

  • $700*3*0.07 = $147
4 0
3 years ago
Read 2 more answers
I will mark u brainalist
expeople1 [14]

Answer:

C

Step-by-step explanation:

The cost of 5 notebooks (5x)

Less than (<)

The cost of 3 notebooks (3x)

Plus a 2 dollar pen (2)

All together: 5x < 3x + 2

Matches with the given expression.

8 0
3 years ago
Show all work to solve by factoring 3x^2 − x − 2 = 0.
shtirl [24]

Answer:

The solutions are x=1 and x=-2/3

Step-by-step explanation:

we have

3x^{2}-x-2=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

3x^{2}-x=2

Factor the leading coefficient

3(x^{2}-(1/3)x)=2

Complete the square. Remember to balance the equation by adding the same constants to each side

3(x^{2}-(1/3)x+(1/36))=2+(1/12)

3(x^{2}-(1/3)x+(1/36))=25/12

Rewrite as perfect squares

3(x-(1/6))^{2}=25/12

(x-(1/6))^{2}=25/36

square root both sides

(x-(1/6))=(+/-)(5/6)

x=(1/6)(+/-)(5/6)

x=(1/6)(+)(5/6)=1

x=(1/6)(-)(5/6)=-2/3

4 0
3 years ago
Will give Brainliest to whoever can help me
Murrr4er [49]

Answer:

-4/3, -0.4, 0.8, \sqrt 2, \sqrt 11

Step-by-step explanation:

-4/3 equals -1.333(repeating)

\sqrt 2 = 1.4

\sqrt 11 = 3.3

7 0
3 years ago
Another way to express the problem 1 - (-7)?
WARRIOR [948]
1+7=8
Hope this helps :D
6 0
3 years ago
Read 2 more answers
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