3 years ago

Answer fast for pts

Mathematics

2 answers:

NeTakaya3 years ago

7 0

Maria arrived at 8:30
It's can't be told that no one have arrived before her
She registered the times between 8:30 to 9:30 .
She hasn't registered the data of students who came before her .
So it's not a representative sample

sdas [7]3 years ago

4 0

Answer:

Since she arrived at 8:30 its not accurate because her records started at the time she arrived so she didnt get the times of the students that arrived before her

Step-by-step explanation:

Hope this helps:))

You might be interested in

X + y = -1<br> 4x - 2y = -16

djyliett [7]

Answer:

$x=-3 \\and\\ y=2$

Step-by-step explanation:

$x + y = -1$ Equation:1

$4x - 2y = -16$ Equation:2

Solving Equation:1

$x+y=-1$

Subtracting 'y' from both the sides:

$x+y-y=-1-y\\\\x=-1-y$

Putting 'x' in Equation :2

$4(-1-y)-2y=-16\\\\-4-4y-2y=-16\\\\-4-6y=-16$

Adding '4' both the sides

$-6y=-16+4\\\\-6y=-12\\\\y=-12/-6\\\\y=2$

Putting the value of 'y' in equation:1

$x+y=-1$

$x+(2)=-1\\\\x=-1-2\\\\x=-3\\$

The solution is:

$x=-3 \\and\\ y=2$

6 0

3 years ago

The perimeter of the scalene triangle is 54.6 cm. Which equation can be used to find the value of b if side a measures 8.7 cm?

77julia77 [94]

A scalene triangle is a triangle that has 3 sides that are all different lengths.

Let these letters represent the problem:

a = 8.7

b = side 2

c = side 3

P = 54.6

To find the perimeter, we just need to add all the sides [ P = a + b + c ]

So, put what we have in the formula above.

54.6 = 8.7 + b + c

Best of Luck!

7 0

3 years ago

Read 2 more answers

What is the result when 75,069 is divided by 45

Lera25 [3.4K]

Answer: 1668.2

Multiply 1668.2×45 and get 75,069

5 0

3 years ago

Read 2 more answers

What is between 280 and 560?

nikitadnepr [17]

420 would be the middle number.

Hoped I Could Help:)

3 0

3 years ago

which sequence uses the algebraic expression 4n+5 to describe the relationship between a term in the sequence and its position,

Veronika [31]

Is there any enquations

3 0

3 years ago