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2 years ago

Help, I don’t understand

Mathematics

1 answer:

Agata [3.3K]2 years ago

3 0

Answer: -1

Step-by-step explanation: f(x) is another way of saying y. So when y is 3, according to the table, x is -1

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Hi, need help with solving this logarithm.

vfiekz [6]

Answer:

$\log 8 - \log x + 7\log\sqrt x =\log (8x^{\frac{5}{2}})$

Step-by-step explanation:

Given

$\log 8 - \log x + 7\log\sqrt x$

Required

Express as a single expression

We have:

$\log 8 - \log x + 7\log\sqrt x$

Write 7 as an exponent

$\log 8 - \log x + 7\log\sqrt x =\log 8 - \log x + \log(\sqrt x)^7$

Rewrite as:

$\log 8 - \log x + 7\log\sqrt x =\log 8 - \log x + \log(x^{\frac{1}{2}})^7$

$\log 8 - \log x + 7\log\sqrt x =\log 8 - \log x + \log x^\frac{7}{2}$

Apply quotient and product rule of logarithm

$\log 8 - \log x + 7\log\sqrt x =\log (\frac{8*x^\frac{7}{2}}{x} )$

Apply law of indices

$\log 8 - \log x + 7\log\sqrt x =\log (8*x^{\frac{7}{2} - 1})$

Solve exponent

$\log 8 - \log x + 7\log\sqrt x =\log (8*x^{\frac{7-2}{2}})$

$\log 8 - \log x + 7\log\sqrt x =\log (8*x^{\frac{5}{2}})$

$\log 8 - \log x + 7\log\sqrt x =\log (8x^{\frac{5}{2}})$

8 0

2 years ago

Please help due soon!!!!!

eimsori [14]

First you need to graph the coordinate points to see the triangle.

Then you need to drop lines down on the graph to form right triangles and use Pythagorean Theorem.

The line of points -5,-1 and -2,3 measures 5 using Pythagorean theorem.

The line of points 6,-3 and -5,1 measures √125

The line of points 6,-3 and -2,3 measures 10 using Pythagorean theorem.

So...

5 + 10 = 15

15 + √125

7 0

2 years ago

What is the formula for circumference? а a C = (pi) bo C = 2r с C = (pi) r2

kramer

Answer:

2(pi)r=C

Step-by-step explanation:

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2 years ago

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The price of a picture is £80. Find the new price after it has been decreased by 20%.

rusak2 [61]

Hello there, and thank you for posting your question here on brainly.

You have to find the 20% decrease in 80.

To find the decrease, you have to multiply 80 and 20%.

80 * 20% ===> 64

The price is now <span>£64.

Hope this helped!! ☺♥
</span>

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2 years ago

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