MATHEMATICS HIGH SCHOOL

The mean temperature for the first 7 days in January was 9 °C. The temperature on the 8th day was 8 °C. What is the mean temperature for the first 8 days in January

Answers

Answer 1
Answer:

Answer:

8.875\°C

Step-by-step explanation:

Let

x ----> the mean temperature for the first 8 days in January

we know that

The mean temperature for the first 7 days in January multiplied by 7 is equal to the sum of the temperatures for the first 7 days

9(7)=63°C

so

The sum of the temperatures for the first 7 days plus the temperature on the 8th day, all divided by 8 is equal to the mean temperature for the first 8 days in January

x=(63+8)/(8)=8.875\°C
Answer 2
Answer:

Answer:

8.875 degrees Celsius

Step-by-step explanation:

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Which is the graph of the function f(x) = x2 + 2x + 3?

Answers

Answer:

Refer the graph attached.

Step-by-step explanation:

Given : Equation f(x) = x^2 + 2x + 3  

To find : The graph of the given equation?

Solution :  

Let,y= x^2 + 2x + 3  

First we find the points which satisfy the equation and then joining those points give you the graph.

Points are

x      y

-3   6

-2   3

-1    2

0   3

1    6

Now, We plot these points.

The graph is the parabola with vertex (-1,2).

Refer the attached graph below.

Answer:

first graph on edge

Step-by-step explanation:

What number goes between 44 and 88 and right before 76?

Answers

Either 66 or 75, because 66 to follow the 11 multiples.

Round 45,122 to the nearest ten thousand

Answers

Rounded to the nearest 10,000, 45,122 is 50,000. This is because the 5 has been reached and so it is rounded up.

To round to the nearest  ten thousand, we look at the last four digits. If these digits are 5000 or greater, then we round the thousands digit up, and if they are less than 5000, then we round down, keeping the ten  thousand's digit the same.

The question is asking to Round 45,122 to the nearest ten thousand .

The last 4 digits are 5122.

This is greater  than 5000.So  we round up .

45,122 to the nearest ten thousand is 50,000.

Find the value of d that makes the equation true: d - 8 = 5.

d = 10
d = 11
d = 12
d = 13

Answers

To answer this, you need to get "d" on one side by itself. To do this, add 8 to both sides of the equation.

d- 8 + 8 = 5 + 8
-8 and +8 cancel out leaving:
d = 13

Your answer is d = 13

Which of the following mixed numbers is equivalent to 12.16?

Answers

Answer:

12 4/25 is equivalent to 12.16 .

Apples are on sale for $1.20 a pound. Logan bought 3/4 of a pound. How much money did he spend on apples

Answers

What I did was turn ¾ in to a fraction (which is 75%) then turned it into a decimal (.75)
then I multiplied .75 by 1.20 and .9
So she spent 90 cents on apples
Hope I helped :)
(3)/(4) * 1.20 = (3.6)/(4) = \huge{\boxed{0.9}}

He spend 90 cents on apples.
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