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3 years ago

Ms. Nellies

Mathematics

1 answer:

Marat540 [252]3 years ago

8 0

Answer:

the equation is incorrect

Step-by-step explanation:

Let u show the equation

The correct equation is $2\frac{1}{2} \div \frac{3}{8}$

= 2 1/2 ➗ 3/8

= 5/2 ➗ 3/8

$= \frac{ 5 \times 8}{2 \times 3}$

$= \frac{40}{6} \\\\ = \frac{20}{3}$

$= 6\frac{2}{3}$

Hence, the equation is incorrect

Trey's Number line model is incorrect because it represents the expression

$2\frac{1}{2} \div \frac{3}{8}$

Ms. Nellies has enough vinegar for 6 groups of students as $2\frac{1}{2} \div \frac{3}{8}$

$= 6\frac{2}{3}$

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If a bacteria population starts with 100 bacteria and doubles every three hours, then the number of bacteria after t hours is n

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Answer:

$f^{-1}=3ln_2(\frac{t}{100})$

f^-1 represents the number of hours the bacteria developed

Step-by-step explanation:

$f(t) = 100 \cdot 2^\frac{t}{3}$

To find inverse of a function , replace f(t) with y

$y= 100 \cdot 2^\frac{t}{3}$

replace t with y and y with x

$x= 100 \cdot 2^\frac{y}{3}$

solve for y

divide both sides by 100

$\frac{x}{100} =2^\frac{y}{3}$

take ln on both sides

$ln \frac{x}{100} =\frac{y}{3}ln 2$

divide both sides by ln

$ln_2(\frac{x}{100}) =\frac{y}{3}$

multiply by 3 on both sides

$y=3ln_2(\frac{x}{100})$

Replace x with t and y with f^-1

$f^{-1}=3ln_2(\frac{t}{100})$

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7 0

3 years ago

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Anastasy [175]

Answer:

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3 years ago

Solve for x in the following equation.

KonstantinChe [14]

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2 years ago

From 1995 - 2008 in the US 648 people were struck by lightening. 531 of them were men. You want to see if this observation diffe

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Answer:

Because z is higher than any given value in the chart we come to the conclusion To reject null hypothesis

Step-by-step explanation:

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This is the proportion of men that were hit by lightening

Null hypothesis: H0: p = 0.5

Alternate hypothesis: H1: p ≠ 0.5

Test statistics z = 0.8194-0.5/(√0.5x0.5/648)

= 0.8194-0.5/√0.0003858

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Since the z > 1.96 (at 5% significance) we reject the null hypothesis.

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Please check attachment!

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4 years ago

What is the value of x

My name is Ann [436]

X=3

Explanation:

A straight line equals 180°, and they give you the one angle of 56°, so you know 56+ the other equation has to equal 180

56+4x+112=180
168+4x=180

Subtract 168 from both sides

4x=12

Divide 4 from both sides

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You can check by filling it in.

56+4*3+112=

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3 years ago