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3 years ago

Please I need help

Mathematics

1 answer:

lianna [129]3 years ago

5 0

Answer:

7 cases were missed

Step-by-step explanation:

40+20 = 70

70 points missed means they missed 7 total classes

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Pls help i will give a good amount of points

AleksandrR [38]

The area is 10,994.39

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4 years ago

Stephanie and victor each built a rectangular garden .Stephanies garden is three times as long and tree times as wide as victori

MrRa [10]

Answer:multiply by three

Step-by-step explanation:

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3 years ago

Find the expected value of the winnings from a game that has the following payout probability distribution: Skip Payout ($) 1 2

Nezavi [6.7K]

Answer:

$4.35

Step-by-step explanation:

The expected value of a random variable <em>X</em>, often denoted as E(<em>X</em>), indicates the probability-weighted average of all possible values/events. The general formula of expected value is

$\mathrm{E(\textit X \mathrm)} = \displaystyle\sum_{\mathclap{i=1}}^{k} \ X \times P(X) \\ \\ \\ = X_{1} \times P(X_{1}) \ + \ X_{2} \times P(X_{2}) \ + \ X_{3} \times P(X_{3}) + \ \cdots \ + X_{k} \times P(X_{k})$ .

Therefore, the expected value of the winnings from a game is

$\mathrm{E(\textit X \mathrm)} \ = \ 1 \times 0.35 \ + \ 2 \times 0.2 \ + \ 5 \times 0.1 + \ 8 \times 0.2 \ + 10 \times 0.15 \\ \\ = \ 4.35 \ \ (\mathrm{nearest \ hundredth})$ .

4 0

2 years ago

Sandra sets the cruise control in her car to 69 miles per hour when she goes on road trips. Which equation can be used to find h

jarptica [38.1K]

Answer: $h=\frac{m}{69}$

Step-by-step explanation:

For this exercise is necessary to remember the following formula:

$V=\frac{d}{t}$

Where "V" is the speed, "d" is the distance and "t" is the time.

In this case you must solve for the time, then:

$tV=d\\\\t=\frac{d}{V}$

Based on the information provided in the exercise, you can identify that:

$V=69\\\\t=h\\\\d=m$

Therefore, knowing this, you can make the substitution into the formula $t=\frac{d}{V}$ .

Through this procedure you get that the equation that can be used to find the amount of hours "h" that it will take Sandra to drive "m" miles at her constant speed, is:

$h=\frac{m}{69}$

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4 years ago

Expand . ( 3x –2 ) 2 need an answer ASAP.

jeyben [28]

Answer:

6x - 4

Step-by-step explanation:

For expanding (3x -2) 2 , (3x - 2) is to be multiplied with 2.

(3x - 2) × 2 = 6x - 4

4 0

2 years ago

Read 2 more answers