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3 years ago

14

HELP ME

1 answer:

kherson [118]3 years ago

7 0

Answer: 18

Step-by-step explanation: for the boys 4 times 18 equals 72 so there are 4 rows of 18. for the girls 5 times 18 is 90 so 5 rows of 18.

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How is a rational number that is not an interger different from a rational number when it's interger

KATRIN_1 [288]

Integer are whole numbers like 3,18,34 and 256 rational numbers are any numbers which can be expressed as a ratio of two integers -3/4 is a rational numbers 124.45 is a rational number.in other words,rational numbers INCLUDE all integers.fraction are rational numbers

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4 years ago

Does 9,12,15 form a right triangle

wolverine [178]

Answer:

Yes.

Step-by-step explanation:

Note that 15^2 = 122^ + 9^2 ( 225 = 144 + 81 = 225).

So by the Inverse of Pythagoras Theorem it is a right triangle.

3 0

3 years ago

Consider the probability distribution shown below. x 0 1 2 P(x) 0.15 0.80 0.05 Compute the expected value of the distribution. (

larisa [96]

Answer:

Expected value =0.9

Standard deviation = 0.4359

Step-by-step explanation:

Let's use the formula to find expected value or mean.

Expected value =Σ x *P(x)

x 0 1 2

P(x) ) .15 .8 .05

So, expected value = (0)(0.15) +1(0.8)+2(0.05)

= 0 +0.8 +0.1

=0.9

Expected value =0.9

Now, let's find standard deviation

x $(x- E(x))^{2}$ $(x-E(x))^{2} *p(x)$

0 $(0-0.9)^{2}$ $(0-0.9)^{2} *0.15$ =0.1215

1 $(1-0.9)^{2}$ $(1-0.9)^{2} *0.8$ =0.008

2 $(2-0.9)^{2}$ $(2-0.9)^{2} *0.05$ =0.0605

Now, add the last column together and then take square root to find standard deviation.

Standard deviation of the distribution = $\sqrt{0.1215+0.008+0.0605)}$

Simplify it, so standard deviation =0.4358898...

Round the answer to nearest four decimal places

Standard deviation = 0.4359

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3 years ago

Andre hit 46 balls at practice. He hit no fewer than 20 less than double the number of hits Jason had. Which inequality represen

jekas [21]

If a is the number of balls Andre hit then a≥2j-20.

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3 years ago

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katen-ka-za [31]

Answer:

A. Lucrative

Step-by-step explanation:

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3 years ago

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