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Nadusha1986 [10]
3 years ago
14

Sofia is taking a multiple choice test with a total of 80 points available. Each question is worth exactly 4 points. What would

be Sofia's test score (out of 80) if she got 4 questions wrong? What would be her score if she got
x questions wrong?
Mathematics
1 answer:
svet-max [94.6K]3 years ago
5 0

Answer: if she got four wrong the answer is 64

Step-by-step explanation:80/4 is 20 so that means there is 20 question any amount of questions she got wrong multiply by 4 would give you the number to subtract from 80

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You roll a pair of fair dice until you roll “doubles” (i.e., both dice are the same). what is the expected number, e[n], of roll
bonufazy [111]

We need to define our outcomes and events.

 

Finding the probability<span> of each event occurring separately, and then multiplying the probabilities is the step to <span>finding  the probability</span> of two independent events that occur in sequence.

</span>

<span>
To solve this problem, we take note of this:</span>

 

The roll of the two dice are denoted by the pair

(I, j) ∈ S={ (1, 1),(1, 2),..., (6,6) }

Each pair is an outcome. There are 36 pairs and each has probability 1/36. The event “doubles” is { (1, 1),(2, 2)(6, 6) } has probability p= 6/36 = 1/6. If we define ”doubles” as a successful roll, the number of rolls N until we observe doubles is a geometric (p) random variable and has expected value E[N] = 1/p = 6.

3 0
3 years ago
You are standing 40 meters from the base of a tree that leans 8o away from you. The angle of elevation from you to the top of th
Y_Kistochka [10]

Answer:

the height of the tree is <em>15.49 m</em>

<em></em>

Step-by-step explanation:

Step 1:

From the figure, we can determine ∠ATB by using the fact that the sum of all the angles in a triangle add up to 180°:

∠ ATB  = 180° - 98° - 20°

∠ ATB = 62°

Step 2:

Therefore, using the law of sines, we can determine the height of the tree.

TB / sin(20°)  = 40 / sin(62°)

TB = 40 × (sin(20°) / sin(62°))

<em>TB = 15.49 m </em>

<em></em>

Therefore, the height of the tree is <em>15.49 m</em>

3 0
3 years ago
A police officer investigating an accident finds a skid mark of 115 ft in length. How fast was the car going when the driver app
Dominik [7]
The question doesn't provide enough information to get an accurate answer. Please provide more information or provide acceptable assumptions.
5 0
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2617 to the nearest thousand
Sliva [168]

Answer:

3000

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
100y−39,000=55(x−800)
hoa [83]

Answer:

y = 11/20x -50

Step-by-step explanation:

100y−39,000=55(x−800)

Distribute

100y−39,000=55x−44000

Add 39000 to each side

100y−39,000+39000=55x−44000+39000

100y = 55x -5000

Divide each side by 100

100y/100 = 55x/100 - 5000/100

y = 11/20x -50

This is slope intercept form

where 11/20 is the slope and -50 is the y intercept

4 0
3 years ago
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