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Dennis_Churaev [7]
3 years ago
9

Plz asap maxium points will mark brainliest

Mathematics
1 answer:
Mariana [72]3 years ago
4 0

Answer:

12

Step-by-step explanation:

We know that AD=BC and that AB=CD. We also know the perimeter of the rectangle ABCD to be 54 units.

From this, we can add up the sides which will be equal to 54 units.

AD+BC+AB+CD=54

2x+2x+3x-3+3x-3=54

10x=60

x=6

Since we are trying to find the length of side BC we substitute this value back into 2x.

BC=2x =2*6=12

Therefore, the length of BC is 12 units.

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Round to the nearest hundred 2311
babymother [125]

Answer:

2300

Step-by-step explanation:


8 0
2 years ago
Which function in Excel is used to perform a test of independence? a. T.TEST b. CHISQ.TEST c. NORM.S.DIST d. Z.TEST
denis23 [38]

Answer:

b. CHISQ.TEST

Step-by-step explanation:

Notation and previous concepts

A chi-square test is "used to test if the variance of a population is equal to a specified value. This test can be either a two-sided test or a one-sided test. The two-sided version tests against the alternative that the true variance is either less than or greater than the specified value"

The statistic is given by:

\chi^2 = \sum_{i=1}^n \frac{(O_i-E_i)^2}{E_i}

In order to calculate the p value we need to have in count the degrees of freedom , on this case df=(rows-1)(#cols-1). And we can calculate the p value would be given by:

p_v =P(\chi^2 >\chi^2_{calc})

But the correct comand is given by:

b. CHISQ.TEST(Actual range, Expected range)

We just need to put in one column the Observed values and in other the expectec values.

3 0
3 years ago
Gilda walks to the train station. If she walks at the rate of 3 mph, she misses her train by 7 minutes. However, if she walks at
Salsk061 [2.6K]
We'll represent the distance as d and the time as t. 
d= 3(t+7)            because Gilda is 7 minutes late when travelling 3 mph
d= 4(t-5)             because Gilda is 5 minutes early at 4 mph

d= 3t + 21
d= 4t -20
3t +21 =4t -20
41=t
d= 3(41) +21= 144
The distance is 144 miles. 
3 0
3 years ago
Read 2 more answers
Henry and 28 classmates are going to the roller skating rink. each van can hold 11 students . If all of the van are full except
lawyer [7]

you divide 29:11= 2 7/11  

so you have 2 full vans and one with 7 students.

so yes the answer is 7

5 0
3 years ago
Read 2 more answers
Suppose 8 books stacked on top of one another. Each book is 1 5/9 inches thick. How high is the stack of books?
Mekhanik [1.2K]

Answer:

Step-by-step explanation:

12.4

you have to multiply 1 5/9 times 8

8 0
3 years ago
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