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enot [183]
2 years ago
5

Jessica's grandparents gave her $2000 for college to put in a savings account until she starts college in four years. Her grandp

arents agreed to pay her an additional 7.5% simple interest on the $2000 for every year. How much extra money will her grandparents give her at the end of four years?
Mathematics
1 answer:
Alecsey [184]2 years ago
6 0

Answer:

The correct answer to the following question will be "$600".

Step-by-step explanation:

The given values are:

Principal, P = $2000

Rate of interest, r = 7.5%

After changing percentage into decimal, we get

r = 0.075

Time, t = 4

As we know,

I = P\times r\times t

On putting the given values in the above formula, we get

⇒   = 2000\times 0.075\times 4

⇒   =600

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128 and 74.

Step-by-step explanation:

128 rounded to the nearest ten is 130, and 74 rounded to the nearest ten is 70. 130-70=60

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the left and right page numbers of an open book are two consecutive integers whose sum is 589. find these page numbers
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267 and 322

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3 years ago
The mean of six numbers is 8, and the mean of another four numbers is 5.
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Answer:

6.8

Step-by-step explanation:

8 * 6 = 48 (to reverse dividing by 6 to basically un-average the 6 numbers).

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4 0
2 years ago
If
Tju [1.3M]

Answer:

Step-by-step explanation:

Rationalize the denominator of b. So, multiply the numerator and denominator by \sqrt{x}

b = \frac{(1-2\sqrt{x}) *\sqrt{x}}{\sqrt{x}*\sqrt{x}  }=\frac{1*\sqrt{x} -2\sqrt{x} *\sqrt{x} }{\sqrt{x} *\sqrt{x} }\\\\=\frac{\sqrt{x} -2x}{x}\\

Now, find a +b

a +b = \frac{2x+\sqrt{x} }{x}+\frac{\sqrt{x} -2x}{x}\\\\=\frac{2x+\sqrt{x} +\sqrt{x} -2x}{x}

Combine like terms

= \frac{2x-2x+\sqrt{x} +\sqrt{x} }{x}\\\\=\frac{2\sqrt{x} }{x}

Now find (a + b)²

(a +b)² = (\frac{2\sqrt{x} }{x})^{2}

          = \frac{2^{2}*(\sqrt{x} )^{2}}{x^{2}}\\\\= \frac{4* x}{x^{2}}\\\\= \frac{4}{x}

Hint: \sqrt{x} *\sqrt{x}  =\sqrt{x*x}=x

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