Help!!!!!! I need to know if it's right!

Answer:

Maggie is 7 years old

Step-by-step explanation:

Attached is an image that explains the question. Hope this helps!

Answer:

Expected Score (No Negative Marking) = 135 points

Expected Score (with penalty) = 130 points

Step-by-step explanation:

First we find no. of true false answered correctly:

True/False Correct = (Total No. of True/False)(Probability to correctly answer true/false)

True/False Correct = (25)(0.8)

True/False Correct = 20

Now, for points scored from true/false:

True/False Score = (True/False Correct)(Points for 1 True/False)

True/False Score = (20)(2)

True/False Score = 40 points

Now, we find no. of mcqs answered correctly:

MCQs Correct = (Total No. of MCQs)(Probability to correctly answer MCQs)

MCQs Correct = (35)(0.75)

MCQs Correct = 26.25 = 26

Now, for points scored from MCQs:

MCQ Score = (MCQs Correct)(Points for 1 MCQ)

MCQ Score = (26)(1)

MCQ Score = 26 points

Now, we find no. of fill in the blanks answered correctly:

Fill in the blanks Correct = (Total No. of Fill in the blanks)(Probability to correctly answer Fill in the blanks)

Fill in the blanks Correct = (35)(0.65)

True/False Correct = 22.75 = 23

Now, for points scored from true/false:

Fill in the blanks Score = (Fill in the blanks Correct)(Points for 1 Fill in the blanks)

Fill in the blanks Score = (23)(3)

Fill in the blanks Score = 69 points

So, the expected total score will be:

Expected Score = 40 points + 26 points + 69 points

Expected Score = 135 points

IN CASE OF PENALTY:

We know that:

Incorrect True/Flase = Total True/False - Correct True/False = 25 - 20 = 5

Therefore,

Total Penalty = (Incorrect True/False)(Penalty on one)

Total Penalty = (5)(- 1 points)

Total Penalty = - 5 points

Now, expected score will be;

Expected Score (with penalty) = 135 points - 5 points

Expected Score (with penalty) = 130 points

Answer:

226

Step-by-step explanation:

(-16)-10y=24

-10y=24+16

this steps has been cropped in the pic

so try to understand

hope you like the answer

please mark as brainlist

Answer:

51.6 was the average speed

Step-by-step explanation:

speed= distance/time

Answer:

a=5

Step-by-step explanation:

first, let's distribute on the left side.

-4(7a+5)=-160

-28a-20=-160   distribution

-28a=-140   adding 20 on both sides

a=5     dividing by -28 on both sides

there's your answer!

Answer:

Step-by-step explanation:

Rewrite the expression y^2/3 as a radical expression.

if n is a positive integer that is greater than x and a is a real number or a factor, then aˣ/ⁿ = [tex]\sqrt[n]{a^x}[/tex]

use the rule to convert y²/₃ to a radical

where a =, x =, and n =.

therefore, the radical expression is [tex]\sqrt[3]{y^2}[/tex]

Answer:

no

Step-by-step explanation:

if they have the same side lengths, then neither of the squares were scaled up nor down. they're the same size, so they're just copies of each other

Answer:

$27, $30, $47, $1093, $1851

Step-by-step explanation:

The median is the middle number and the mean is the average. When averaging all the numbers above, you get 611 and the middle number is 47.

The possible data set is $27, $30, $47, $1093, and $1851.

The average of a group of variables is referred to as the mean in mathematics and statistics. There are several methods for calculating the mean, including simple arithmetic means (adding the numbers together and dividing the result by the number of observations), geometric means, and harmonic means.

To create a data set of five freshmen students with the same mean and median as the surveyed college freshmen:

Arrange the five numbers in ascending order to create the data set.

For example, one possible data set is:

$27, $30, $47, $1093, $1851

The mean of this data set is (28+  40 + 47 + 1090 + 1850) / 5 = $611, which is the same as the mean of the surveyed college freshmen.

The median of this data set is 47, which is also the same as the median of the surveyed college freshmen.

Therefore, $27, $30, $47, $1093, and $1851 are the points of the data set.

To learn more about the mean;

brainly.com/question/13451489

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Answer: X-3(2x-8)= -25

A. X= 11

B. X= 14

C. X=10

D. x=5

Step-by-step explanation:

Answer:

58.67 17600/ 300 = 58.67

Answer:

D because if you remove the song there will be no more numberrs which is the opposite.

Situations A, C and D are the correct answers.

From the options, we need to check the situations opposite to 80.

An integer is a number with no decimal or fractional part and it includes negative and positive numbers, including zero.

Now,

Situation A: An aeroplane descends 80 m, this can be represented in integer form as -80.

Situation B: An elevator ascends 80 m, this can be represented in integer form as 80.

Situation C: The cost of a train ticket drops by $80, which can be represented in integer form as -80.

Situation D: You remove 80 songs from an iPhone, which can be represented in integer form as -80.

Situation E: Suzy's grandmother is 80 years old, which can be represented in integer form as 80.

Therefore, situations A, C and D are the correct answers.

To learn more about integers visit:

https://brainly.com/question/15276410.

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Answer:

Kindly check explanation

Step-by-step explanation:

Given the data :

x: ____ 1____ 2____ 4____ 8____ 16

p(x): _0.05_ 0.15__ 0.25__0.30__ 0.25

E(X) : Σ[(X). P(X)]

Σ(1*0.05) + (2*0.15) + (4*0.25) + (8*0.30) + (16 * 0.25)

= 7.75

B)

E(x) = u = 7.75

Var(X) = E[(x - u)²*p(x)] = (1 - 7.75)^2 * 0.05 + (2 - 7.75)^2 * 0.15 + (4 - 7.75)^2 * 0.25 + (8 - 7.75)^2 * 0.30 + (16 - 7.75)^2 * 0.25 = 27.7875

C)

Standard deviation (s)

s = √Var(x)

s= √27.7875

s = 5.271

D)

VAR(X) = E(X²) - (E(X))²

E(X²) = Σx²*p(x)

E(X²) = Σ(1^2 * 0.05 + 2^2 * 0.15 + 4^2 * 0.25 + 8^2 * 0.30 + 16^2 * 0.25) = 87.85

V(X) = E(X^2) - (E(X))^2 = 87.85 - 7.75^2 = 27.7875

Answer:

x=C-b

Step-by-step explanation:

Subtract b from both sides to get x alone.

Answer:

the answer is 0.00945

Answer:

0.00945g/mL

Step-by-step explanation:

Divide the mass / volume value by 1000

Answer:

The constant rule being followed is that the sum of x and y in every case is 5

Since the sum of x and y is 5, we can say that the value of y is 5-x

So we can define a function for this rule:

f(x) = 5 - x

Answer:

Step-by-step explanation:

From the table we see that:

Considering the above observations we can put equation:

Answer:

B. 4d + 50 = 114

Step-by-step explanation:

Given parameters:

Hourly rate = $d/hr

Flat fee = $50

Charge for the 4hrs = $114

Number of hours = 4hrs

To find d;

    Total cost  = $114;

             $114  = Flat fee + (rate per hour x number of hours)

            $114 = $50 + 4d

The value of d can be calculate using;

           4d + 50 = 114

The value of d is 4d + 50 = 114

Answer:

-729, so x9

Step-by-step explanation:

-81×9=-729 hope it helps!

Answer:yes

Step-by-step explanation:Y=x/2 because it goes through the origin

Answer:

4 tickets cost $30

step by step:

15+7.50=22.5 (3 tickets)

22.5+7.50=30 (4 tickets)

Answer:

None of these points form a right triangle.

Step-by-step explanation:

IF YOU'RE TRYING TO FIND IF THE POINTS FORM A RIGHT TRIANGLE, THIS SHOULD WORK.

5,5,3 Explantation: To first start things off, we know our hypotenuse is the longest side of the right triangle. Using this information, we know that 5*2( 5 squared) is 25 and that 3 squared is 9. Now we add these two points and we get 34. (Don't forget to square the other side.) Now we have 34=25 which is not true sooo we know the points given do not form a RIGHT triangle.

The same goes with the other points. Once you solve them, neither of them form a right triangle. (Don't forget that we use a*2 + b*2=c*2) (The c should be the biggest point given!)

Hope this helps, if you have any questions please feel free to ask! :)

Answer:

11, 37, 63, 89, 115, 141

Step-by-step explanation:

Subtract 89 from 115 and you get 26.

Subtract 115 from 141 and you get 26.

Its a pattern, subtract 26 from 89 and you get 63, keep subtracting 26.

Answer:

11, 37, 63, 89, 115, 141

Step-by-step explanation:

Every time you proceed right you add 26 to the last number.

Every time you go left you take away 26 from the last number

Hope this helps:)

(just add until 89 is 115 and add the answer to 115 and see if the answer adds up)

Answer:

there are 126 hybrid cars.

Step-by-step explanation:

28% of 450 is 126

ta-daaa

Answer: 280

Step-by-step explanation:

100/30=3.(3)

3.(3)*84=280

Answer:

280

Step-by-step explanation:

Answer:

$100

Step-by-step explanation:

If 1=$25, 2=$50, then 4*25=100 and 50*2=100