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3 years ago

Answers to 6,7,8 pleaseee?

Mathematics

1 answer:

Grace [21]3 years ago

3 0

Answer:

8 nCr 4 = 8 * 7 * 6 * 5 / 4! = 70

P = 1 - 12/70 ≈ 0.83

7.7 - 5 = 2.7 --> Answer c.

3 5/8 - 1 = 2 5/8 --> Answer a.

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What is the sum of the first five terms of a geometric series with a1=15 and r=1/3

Solnce55 [7]

Answer:

15, 5, 5/3, 5/9, 5/27

Step-by-step explanation:

Recall, that the general form of a geometric series is

a, ar, ar², ar³, .........

where a is the first term and r is the ratio

It is given that the first time is 15, hence a = 15

also given that ratio is 1/3

hence the first 5 terms are:

15, (15)(1/3), (15)(1/3)^2, (15)(1/3)^3, (15)(1/3)^4

simplifying each term gives

15, 5, 5/3, 5/9, 5/27

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2 years ago

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Solve the equation -x/6greaterthanequalto3

enot [183]

Answer (depending if the fraction is positive or negative):

x ≥ 18
x ≤ -18

Step-by-step explanation:

If the fraction is positive:

Write it out: $\frac{x}{6} \geq 3$
Multiply each side by 6 to cancel out the 6 under x. It should now look like this: x ≥ 18

If the fraction is negative:

Write it out: $-\frac{x}{6} \geq 3$
Multiply each side by -6 to cancel out the -6 under x. It should now look like this: x ≤ -18

I hope this helps!

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2 years ago

What does (x2−50x−600)÷(x−60) equal?

Natalka [10]

Answer:

x+10 x ≠ 60

Step-by-step explanation:

(x^2−50x−600)

----------------------

(x−60)

Factor the numerator

(x-60)(x+10)

-------------------

(x-60)

Cancel the like terms

x+10

8 0

3 years ago

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Jethro has paid his annual taxes.He knows that his tax is 27% of his taxable income.If he made $68,000 last year,which proportio

Hatshy [7]

Answer:

$\frac{x}{68,000}= \frac{27}{100}$

Step-by-step explanation:

Let

x ----> amount that Jethro owes in taxes

we know that

Amount that he made last year $\$68,000$

His tax rate $27\%=\frac{27}{100}$

Applying proportion

$\frac{x}{68,000}= \frac{27}{100}$

solve for x

$x=68,000(27)/100\\x=\$18,360$

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2 years ago

One day the temperature was 72.8 degrees F. The temperature dropped to -2.7 degrees. difference, please

djverab [1.8K]

Answer:

the difference is 75.5

Step-by-step explanation:

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3 years ago

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