2 years ago

Solve this problem √-16

Mathematics

1 answer:

a_sh-v [17]2 years ago

3 0

Answer:

$4i$

Step-by-step explanation:

$\sqrt{-1} = i$

Therefore $\sqrt{-16} = \sqrt{16} \sqrt{-1} \\=4i$

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Rudik [331]

$y=75\ \ \ \ x=5\\\\
y=?\ \ \ \ \ x=3\\\\
proportion:\\
\frac{75}{y}=\frac{5}{3}\ \ \ | cross\ multiplication\\\\
75*3=5y\\\\
225=5y\ \ \ | divide\ by\ 5\\\\
y=45
$

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3 years ago

A tax assessor wants to assess the mean property tax bill for all homeowners in a certain state. From a survey ten years ago, a

Jet001 [13]

Answer:

The answer is below

Step-by-step explanation:

From the table, the mean (μ) = 1390.75 and the standard deviation (σ) = 518.75

The confidence level (C) = 90% = 0.9

α = 1 - C = 1 - 0.9 = 0.1

α/2 = 0.1 / 2 = 0.05

The z score of α/2 (0.05) is the same as the z score of 0.45 (0.5 - 0.05) which is equal to 1.645.

The margin of error (E) is given as:

$E=Z_\frac{\alpha}{2}*\frac{\sigma}{\sqrt{n} } \\\\E=1.645*\frac{518.75}{\sqrt{14} } =228.07$

The confidence interval = μ ± E = 1390.75 ± 228.07 = (1162.68, 1618.82)

The confidence interval is between 1162.68 and 1618.82.

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2 years ago

James went out for. a long walk . he walked 3/4 mile and then sat down to take rest. then walked 1/8 of a mile how far did he wa

scoundrel [369]

Answer:

7/8 mile

Step-by-step explanation:

3/4 = 6/8

6/8+ 1/8 = 7/8

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2 years ago

Equivalent expression for 12x-10

blsea [12.9K]

Answer:

2(6x-5)

Step-by-step explanation:

Factor 2 out of the expression.

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The ages of three cousins are consecutive even whole numbers. The sum of the youngest and oldest is 16. How old is the oldest co

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The oldest cousin should be 10. If their ages are consecutive even whole numbers, then the younger cousins should be 2 & 4. 2+4=6+10=16

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2 years ago