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2 years ago

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A student is given a rock that is known to have a mass of 436.8 grams. She measures the mass of the rock three different times w

ith the following results: 460.9 g, 461.4g, 459.0 g. Calculate the percent error of the student.

1 answer:

love history [14]2 years ago

5 0

I’m not sure just need to answer questions to help me so sorry

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What is the quadratic. Formula?

balu736 [363]

Answer:

$x = \frac{ - b ± \sqrt{ {b }^{2} - 4ac } }{2a}$

Step-by-step explanation:

For example, we'll use this quadratic equation.

${x}^{2} + 5x + 6$

To understand how to plug it into the formula we need to know what each term represents.

$a {x}^{2} + bx + c$

So the equation above would be put into the formula like this.

$x = \frac{ - 5± \sqrt{ {5}^{2} - 4(1)(6) } }{2(1)}$

Then we would solve

$\frac{ - 5± \sqrt{25 - 24} }{2} \\ \\ = \frac{ -5±1}{2}$

Now, the equation will branch off into one that solves when addition and one when subtraction.

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So x={-3, -2} (-3 and -2)

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2 years ago

To fit in an existing frame, the length, x, of a piece of glass must be longer than 12 cm but not longer than 12.2 cm. Which ine

anastassius [24]

Inequality that represents the lengths of the glass:
12 cm < x ≤ 12.2 cm

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2 years ago

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Help please, thanks :)

tensa zangetsu [6.8K]

Answer:

60°

Step-by-step explanation:

Angle 1 is a vertical angle to 60° by the definition of a vertical angle.

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Solve this system of equations by graphing . first graph the equations then type the solution .

Lena [83]

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Answer:

(x, y) = (5, -4)

Step-by-step explanation:

The Desmos graphing calculator is a handy tool for solving questions like this one. It tells you the solution is ...

(x, y) = (5, -4)

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Answer:

Step-by-step explanation:c 15

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