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4 years ago

Find the critical value zc necessary to form a confidence interval at the level of confidence shown below.

Mathematics

1 answer:

Dahasolnce [82]4 years ago

5 0

I think this is the correct answer: * Zc x (sigma/sqrt of n)
c= .95 (Zc of 1.96)
0.711*

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Solve for x PLS HELP NOW

Zepler [3.9K]

Answer:

$x=70$

General Formulas and Concepts:

Pre-Alg

Order of Operations: BPEMDAS
Equality Properties

Step-by-step explanation:

Step 1: Define equation

$\frac{0.35}{\frac{2}{3}x } =\frac{0.45}{x-10}$

Step 2: Solve for x

Cross-multiply: $0.35(x-10)=\frac{2}{3} x \cdot 0.45$
Distribute 0.35: $0.35x - 3.5=\frac{2}{3} x \cdot 0.45$
Multiply: $0.35x - 3.5=0.3x$
Isolate x term: $-3.5=-0.05x$
Isolate x: $70=x$
Rewrite: $x=70$

Step 3: Check

Plug in x to verify it's a solution.

Substitute: $\frac{0.35}{\frac{2}{3}(70) } =\frac{0.45}{70-10}$
Multiply: $\frac{0.35}{\frac{140}{3} } =\frac{0.45}{70-10}$
Subtract: $\frac{0.35}{\frac{140}{3} } =\frac{0.45}{60}$
Evaluate: $0.0075=0.0075$

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3 years ago

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Please help geometry questions find X

ladessa [460]

Answer:

Step-by-step explanation:

The line x originates from the center of the circle and forms a perpendicular line with line RS, which means that the line is bisected.

That means that line RT is half of line RS, or 7.

Then we can use the Pythagorean Theorem to find the measure of x.

$7^2+b^2=9^2$

$49+b^2=81$

$b^2=32$

b = √32

b ≈ 5.66

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3 years ago

Which shows how to find the value of this expression when x=-2 and y=5 (3x^3y^-2)^2??

lidiya [134]

Answer:

(3×-2^3×5^-2)^2

Step-by-step explanation:

I think this is it I'm not sure sorry if it's not I tried my best to help you.

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3 years ago

The answer for my quiz

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3 years ago

What two numbers multiply to 20 and add up to 9

prohojiy [21]

Answer:

5 and 4

Step-by-step explanation:

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