3 years ago

Determine whether the following is an expression or an equation. x+7

Mathematics

1 answer:

salantis [7]3 years ago

7 0

Answer:

It is an expression

Step-by-step explanation:

This is because x+7 is not equated to any number

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Answer step-by-step explanation:

We know that the critical t value for a 98% confidence level for a sample of size n = 18:

Finding degrees of freedom (n-1) = 17

-search the information in table t for 0.98 and find that t = 2.567

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3 years ago

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Answer:

Step-by-step explanation:

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Find the uncertainty in a calculated average speed from the measurements of distance and time. Average speed depends on distance

zzz [600]

Answer:

$\frac{\Delta v}{v}=0.426$

Step-by-step explanation:

you have that the average sped is given by the following formula:

$v(x,t)=\frac{x}{t}$

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$\frac{\Delta v}{v}=\sqrt{(\frac{\Delta x}{x})^2+(\frac{\Delta t}{t})^2}$ (1)

Δv: uncertainty in speed

Δx: uncertainty in the distance = 0.9m

Δt: uncertainty in time = 0.7s

x: distance = 8.1m

t: time = 1.7s

You replace the values of all parameters in the equation (1):

$\frac{\Delta v}{v}=\sqrt{(\frac{0.9}{8.1})^2+(\frac{0.7}{1.7})^2}\\\\\frac{\Delta v}{v}=0.426$

Hence, the relation between the uncertainty in the average velocity is 0.426

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3 years ago

What does 48% equal as a number

Andrews [41]

Answer:

to convert a percent to a whole number just divide by 100

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Use the top top, bottom bottom method.

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