2 years ago

What is the value of –21/6-1 1/4+1 3/4

Mathematics

2 answers:

aleksley [76]2 years ago

7 0

It’s the answer pahaha

Dovator [93]2 years ago

3 0

Answer:

The answer is -3

Step-by-step explanation:

Correct me if I'm wrong, but good luck :)

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The intensity of a light source at a distance is directly proportional to the strength of the source and inversely proportional

jolli1 [7]

Answer:

x= $\frac{16}{\sqrt[3]{2}+1 }$

Step-by-step explanation:

Q= illumination

I = intensity

Q= I/d^2

Q_total = $\frac{I_1}{d_1^2}+\frac{I_2}{d_2^2}$

= $\frac{I}{x^2}+\frac{2I}{(16-x)^2}$

now Q' = 0

⇒I ${-\frac{2}{x^3}}+\frac{4}{(16-x)^3}$

x= $\frac{16}{\sqrt[3]{2}+1 }$

[/tex] $\frac{1}{x^3} = \frac{2}{(16-x)^3}$

x= $\frac{16}{\sqrt[3]{2}+1 }$

is the required point

5 0

3 years ago

Write the point-slope form of the line satisfying the given conditions. Then use the point-slope form of the equation to write

abruzzese [7]

slope = m = 16-10 / 8-5 = 6/3 = 2

y - y1 = m x (x-x1)

y-10 = 2 x (x-5)

y-10 = 2x-10

y = 2x

7 0

3 years ago

A composition of reflections across two parallel lines is a _____

S_A_V [24]

It's transilation (if that's how you spell it)

8 0

3 years ago

Read 2 more answers

We can describe 15x-10 as an expression <br> We would describe 9x+5=32 as an

AlekseyPX

Answer: Equation

Step-by-step explanation: because it has an equal sign. I think that’s what this question means.

6 0

3 years ago

For what value of a does (1/9)a+1 =81a+1 272-a?

AlexFokin [52]

Answer:

-4

Step-by-step explanation:

$\left( \dfrac{1}{9}\right)^{a+1}= 81^{a+1}\cdot 27^{2-a}\\\\\\(3^{-2})^{a+1}=(3^4)^{a+1}\cdot (3^3)^{2-a} \\\\\\3^{-2a-2}=3^{4a+4}\cdot 3^{6-3a} \\\\\\3^{-2a-2}=3^{a+10} \\\\\\-2a-2=a+10 \\\\\\-3a=12 \\\\\\a=-4$

Hope this helps!

8 0

3 years ago