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2 years ago

7

Replace ? with a whole number to make the statements true.a. 20 ÷ 4 = ? means ? × 4 = 20b. 2,725 ÷ 5 = ? means ? × 5 = 2,725c. ?

÷ 5 = 0

1 answer:

Likurg_2 [28]2 years ago

3 0

Most likely five because it makes the most sense

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Find the measures of<br> 21<br> and<br> 22<br> 80°<br> 2102°

cestrela7 [59]

Answer:

Angle 1 is 22°

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Step-by-step explanation:

Angles on a straight line always add up to 180°.

To find Angle 2, you would have to do 180° take away 102°.

180-102=78°

Angles in a triangle also add up to 180°.

So to find Angle 1, you would have to add the two Angles you already have and take it away from 180°.

80+78=158°

180-158=22°

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2 years ago

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Answer:

3 x 2 = 6

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2 years ago

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2 years ago

The 20 to 34 age groups are approximately normally distributed with µ = 110

Savatey [412]

Answer:

21.94% of people aged 20 to 34 have IQs between 125 and 150.

Step-by-step explanation:

<u>The complete question is:</u> Scores on the Wechsler Adult Intelligence Scale (a standard IQ test) for the 20 to 34 age group are approximately Normally distributed with μ = 110 and σ = 25.

What percent of people aged 20 to 34 have IQs between 125 and 150?

Let X = <u><em>Scores on the standard IQ test for the 20 to 34 age group</em></u>

SO, X ~ Normal( $\mu=110,\sigma^{2} =25^{2}$ )

The z-score probability distribution for the normal distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

where, $\mu$ = population mean = 110

$\sigma$ = standard deviation = 25

Now, the percent of people aged 20 to 34 have IQs between 125 and 150 is given by = P(125 < X < 150) = P(X < 150) - P(X $\leq$ 125)

P(X < 150) = P( $\frac{X-\mu}{\sigma}$ < $\frac{150-110}{25}$ ) = P(Z < 1.60) = 0.9452

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The above probability is calculated by looking at the value of x = 1.60 and x = 0.60 which has an area of 0.9452 and 0.7258.

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3 years ago

Write the product in its simplest form: 3a^4*(-2a^6)

Ymorist [56]

Answer:

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Step-by-step explanation:

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multiply constants and add the exponents

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3 years ago