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ELEN [110]
3 years ago
11

Can someone help with my homework please

Mathematics
1 answer:
EleoNora [17]3 years ago
8 0
B is the answer to this problem
You might be interested in
The mean temperature for the first 7 days in January was 6 degrees.The temperature on the 8 days was 10 degrees . What is the me
kolezko [41]

Answer: The mean temperature for the first eight days is 6.5 degrees

Step-by-step explanation: The most important piece of clue has been given which  is the mean (average) for the observed data set, which is 7 days.

Note that the formula for the mean of a data set is derived as;

Mean = ∑x / f

Where ∑x is the summation of all observed data set and f is the number of data observed, that is 7. The formula now becomes;

6 = ∑x / 7

By cross multiplication, we now have,

6 * 7 = ∑x

42 = ∑x

This means the addition of all temperature observed on the first 7 days is 42. The temperature on the eighth day is now given as 10 degrees, this means the summation of all observed data for the first eight days would become 42 + 10 which equals 52. Therefore when calculating the mean for the first eight days, ∑x is now 52. The formula for the first eight days therefore is derived as follows;

Mean = ∑x / 8

Mean = 52 / 8

Mean = 6.5

The calculations therefore show that the mean temperature for the first eight days in January is 6.5 degrees

3 0
3 years ago
A Math professor scores all tests with a maximum of 100 points. A student must have an average of 90 on six tests to receive an
nignag [31]

Answer:

No, he cannot

Step-by-step explanation:

Lets say the student takes the maximum socre on his last test, so he gets 100. Now, his average on the six texts will be:

(75+85+90+95+94+100)/6 = 89.83

So, if taking 100 is not enough to get to the average of 90, this means he would need a score greater than 100, which is impossible as 100 is the maximum. So, the student CAN'T get an A

3 0
3 years ago
A. Graph A<br> B. Graph D<br> C. Graph B<br> D. Graph C
Delicious77 [7]
You can eliminate graphs A and C because the lines are dotted and you can eliminate graph B because the shaded part is below the solid line and the equation is telling you to shade above so the answer is D
5 0
2 years ago
Drag the tiles to the correct boxes to complete the pairs. Solve the inequalities for x, and match each solution to its number l
svetlana [45]

in the figure, the first number line goes with x \leq5

the second number line goes with x \geq 5

the third number line goes with x > 5

the fourth number line goes with x < 5

Two less than 3/2 of a number x is  no more than 5/2 is shown as:

3/2 x- 2 \leq 5 1/2

3/2 x \leq 11/2 + 2

3/2 x \leq 15/2

3x \leq 15

x \leq 5

The sum of two times a number (x) and -2 is at least 8 is shown as :

2x+(-2) \geq 8

2x - 2 \geq 8

2x \geq 8+2

2x \geq 10

x \geq 5

Seven subtracted from 4 times a number (x) is more than 13 is shown as

4x -7 > 13

4x > 13+7

4x > 20

x > 20 ÷ 4

x > 5

Four added to 3 times a number (x) is less than 19 is shown as

3x + 4 < 19

3x < 19-4

3x < 15

x < 15 ÷ 3

x< 5

to learn more about number line inequalities visit brainly.com/question/27916124

# SPJ9

3 0
1 year ago
Referring to the figure, find the surface area
Korvikt [17]

Answer:

2545 m rounded from 2544.69

Step-by-step explanation:

A=2 π r h + 2 π r 2 = 2 · π · 15 · 12 + 2 · π  ·152

≈ 2544.69005

rounded to 2545

~~~

3 0
2 years ago
Read 2 more answers
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