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Liono4ka [1.6K]
2 years ago
15

Solve: 2.40X=40 to find out how many cookies that cost $2.40 each can be bought with $40.

Mathematics
1 answer:
Margaret [11]2 years ago
7 0

Answer:

2.40x= 40

Step-by-step explanation:

Jon's teacher wants to buy giant cookies for the entire class

cookies cost $2.40 each

Let x be the number of cookies bought

Each cookies cost is 2.40

x cookies cost is 2.40x

total amount is $40

So the equation is 40x=40

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The following data represent the discrete probability distribution for the number of stars that reviewers have a first edition s
Shkiper50 [21]

Answer:

Step-by-step explanation:

given that the following data represent the discrete probability distribution for the number of stars that reviewers have a first edition statistics reference book.

Stars            5    4      3         2    1

Probability 25% 35% 20% 10% 10%

H0: Second edition is as per the above probabilities

Ha: atleast one is different from the above probability

(two tailed chi square test)

Alpha = 0.025

Assuming H0 to be true we calculate expected frequencies for total 80

chi square calculatons are shown below

df = 4

                  5     4         3 2 1      Total

Observed 28    28 13 6 5      80

Expected 20    28 16 8 8      80

chi square        

(O_E)^2/E 3.2 0 0.5625 0.5 1.125 5.3875

p value =0.1455

Since p value >0.025, we accept H0

The expected requency of three-star reviews is ________.16

3 0
3 years ago
The number of boys exceeded the number of girls by seven. There were 29 boys and girls. How many of each were there?
Elenna [48]

Answer:

Girls: 11

Boys: 18

Step-by-step explanation:

x: number of girls

x+x+7=29

2x=22

x=11

number of guys:

x+7=11+7=18

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At this rate if you have been in the car for 12.3 hours how many miles have you travled?
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Answer:

738

Step-by-step explanation:


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The answer is c
I love math btw
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