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3 years ago

-5 = u + 6 solve this equation shown here.

Mathematics

1 answer:

Pavel [41]3 years ago

3 0

Step-by-step explanation:

-5=u+6

-5-6=u

-11=u

therefore , u= -11

hope that helps

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Write the equation of the line in point slope form that travels through the points (0,5) and (3,7)

Bond [772]

Answer:

y=2/3x+5

Step-by-step explanation:

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3 years ago

Using your knowledge of exponential and logarithmic functions and properties, what is the intensity of a fire alarm that has a s

Ierofanga [76]

Option B:

$I=1.0\times\ 10^{0} \ \text {watts}/ \text m^2}$

Solution:

Given sound level = 120 decibel

To find the intensity of a fire alarm:

$$\beta=10\log\left(\frac{I}{I_0} \right)$

where $I_0=1\times10^{-12}\ \text {watts}/ \text m^2}$

Step 1: First divide the decibel level by 10.

120 ÷ 10 = 12

Step 2: Use that value in the exponent of the ratio with base 10.

$10^{12}$

Step 3: Use that power of twelve to find the intensity in Watts per square meter.

$$10^{12}=\left(\frac{I}{I_0} \right)$

$$10^{12}=\left(\frac{I}{1\times10^{-12}\ \text {watts}/ \text m^2} \right)$

Now, do the cross multiplication,

$I=10^{12}\times1\times\ 10^{-12} \ \text {watts}/ \text m^2}$

$I=1\times\ 10^{12-12} \ \text {watts}/ \text m^2}$

$I=1\times\ 10^{0} \ \text {watts}/ \text m^2}$

$I=1.0\times\ 10^{0} \ \text {watts}/ \text m^2}$

Option B is the correct answer.

Hence $I=1.0\times\ 10^{0} \ \text {watts}/ \text m^2}$ .

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3 years ago

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fgiga [73]

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Step-by-step explanation:

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Ket [755]

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3 years ago

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By Substitution<br> -6x + 6y = 6<br> -6x + 3y = -12

butalik [34]

Answer:

x = 5 & y = 6

Step-by-step explanation:

hi see the pic for the steps

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3 years ago

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