3 years ago

Determine the type and number of solutions of 6x^2-7x-4=0

Mathematics

1 answer:

Delicious77 [7]3 years ago

3 0

I think it is C-two real solution

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3,750

Step-by-step explanation:

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2 years ago

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(1/27)^x-6=27 Could I please have a step by step as well? Much appreciated!

Andrei [34K]

Answer:

$x = 7$

Step-by-step explanation:

1) Use Division Distributive Property: (x/y)^a = x^a/y^a.

$\frac{1}{ {27}^{x - 8} } = 27$

2) Multiply both sides by 27^x - 8.

$1 = {27} \times 27^{1 + x - 8}$

3) Use the product rule: x^a x^b = x^a+b.

$1 = {27}^{1 + x - 8}$

4) Simplify 1 + x - 8 to x - 7.

$1 = {27}^{x - 7}$

5) Use Definition of Common Logarithm: b^a = x if and only if logb (x) = a.

$log_{27}1 = x - 7$

6) Use Change of Base Rule.

$\frac{ log_1 }{ log{27} } = x - 7$

7) Use rule of 1: log 1 = 0.

$\frac{0}{ log_{27}} = x - 7$

8) Simplify 0/log_27 to 0.

$0 = x - 7$

9) Add 7 to both sides.

$7 = x$

10) Switch sides.

$x = 7$

Therefor, the answer is x = 7.

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3 years ago

Which of the five measures of center (the mean, the median, the trimmed mean, the weighted mean, and the mode) can be calculated

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The mean and median can be calculated for quantitative data only.

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3 years ago

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3 years ago

the national flag of scotland has a white diagonal on a blue backround Tracy is sewing a scottish flag she knows that the length

dybincka [34]

Answer:

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Step-by-step explanation:

By Pythagoras theorem, a²+b²=c², where c represents the diagonal and a and b represents the other sides of a right angled triangle

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Therefore, a²+9²=15²

a²+81=225

a²=144

a=√144

a=12 feet

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3 years ago