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Alex73 [517]
3 years ago
6

"Seven less than a number, divided by 5, is -2." Can you turn it into a equation please??

Mathematics
1 answer:
Xelga [282]3 years ago
7 0

Answer:

Seven less than a number, divided by 5, is -2." Can you turn it into a equation please??

let the number be x

x-7/5= -2

x-7= -10

x= -10+7

x= -3

Step-by-step explanation:

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What are the roots of the quadratic equation x2+2x=-5
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Answer:

x = -1 +/-2i

Step-by-step explanation:

Write the equation in standard form to find the roots, also known as the solutions, zeros, or x-intercepts, of the quadratic.

x² + 2x + 5 = 0

Use the quadratic formula by substituting a= 1, b = 2 and c = 5.

x = \frac{-2 +/- \sqrt{(-2)^2 - 4(1)(5)} }{2(1)} = \frac{-2 +/-\sqrt{4 -20 } }{2} = \frac{-2 +/-\sqrt{-16 } }{2} = \frac{-2 +/-4i }{2} = -1 +/-2i

5 0
3 years ago
7. In each case, write an equation that models the situation described. a) An antique is purchased for $5000 in 1990. It appreci
balandron [24]
A) A= 5000 x .0325 ( 31)
A= 5,037.50

.0325 = 3.25%
31 years 2021-1990 = 31


3 0
3 years ago
An author is having a book signing at a store. He agrees to give 5% of his profit to literacy programs and 15% of his profit to
quester [9]

Answer:

160

Step-by-step explanation:

15% + 5% = 20%

80%=0.8

200x0.8=160

6 0
2 years ago
You decide that you want to purchase a Tesla SUV. You borrow \$95,000 for the purchase. You agree to repay the loan by paying eq
liraira [26]

Using compound interest and a graphing calculator, it is found that it will take about 15 years for the loan to be paid off.

<h3>What is compound interest?</h3>

The amount of money earned, in compound interest, after t years, is given by:

A(t) = P\left(1 + \frac{r}{n}\right)^{nt}

In which:

  • A(t) is the amount of money after t years.
  • P is the principal(the initial sum of money).
  • r is the interest rate(as a decimal value).
  • n is the number of times that interest is compounded per year.

For this problem, the parameters are given as follows:

A(0) = 95000, r = 0.06, n = 12.

Hence the value of the loan after t years is:

A(t) = P\left(1 + \frac{r}{n}\right)^{nt}

A(t) = 95000\left(1 + \frac{0.06}{12}\right)^{12t}

A(t) = 95000(1.005)^{12t}

You have monthly payments of $1,200, hence the amount paid after t years is:

P(t) = 12 x 1,200t = 14400t

Then we have to solve for:

A(t) = P(t)

14400t = 95000(1.005)^{12t}

Which is solved in the graph below, meaning that it will take about 15 years for the loan to be paid off.

More can be learned about compound interest at brainly.com/question/25781328

#SPJ1

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1 year ago
Max lost 23 pounds while on a diet he now wieghts 184 pounds. Write and solve an equation to find his initial weight w
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W-23=184
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W=207
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2 years ago
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