MATHEMATICS MIDDLE SCHOOL

Can you multiply these decimals in your head? You should be able to do it very quickly. Can you figure out the trick? 26.9 × 52.8 × 100.1 × 0.00 × 999.9632 = ?

Answers

Answer 1
Answer:

Answer:

0.00

Step-by-step explanation:

Yes, anyone can multiply these decimals very quickly.

As these decimals include 0 and we know that any number multiply with zero (0) result is always zero (0).

Example: 5 × 0 = 0

⇒ 26.9 × 52.8 × 100.1 × 0.00 × 999.9632 = 0.00
Answer 2
Answer:

I’m kinda dumb but isn’t it 0 because anything times 0 is 0

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Mat ran 8 laps in 1,256 seconds.if he ran each lap in the same amount of time,how many seconds did it take him to run 1 lap?

Answers

Answer=157 seconds

1256 seconds  8 laps

1256/8=157seconds per lap

you need to divide 1,256 by 8 which, is 157 seconds

Four less than the quotient of a number and 4 is 14. What is the number? Let n be the unknown number.

Answers

so the equation is n/4-4=14
then you +4 to both sides 
n/4-4=14 so now the equation is n/4=18 then you multiply 18 by 4 and get 72
   +4    +4
then to check your work
72/4-4=14
so N=72
Hope I helped :)

how would you write 77.7ovdrbar% as a decimal? Set that decimal equal to x. What digit or digits repeat

Answers

Answer:

0.777=0.\overline{7}

Step-by-step explanation:

We are asked to write 77.7% as a decimal.

We know that percent means per hundred.

To write 77.7% as decimal, we will divide 77.7 by 100 as:

77.7\%=(77.7)/(100)

Move decimal to left by two digits.

77.7\%=(77.7)/(100)=0.777

Let us set 0.777 equal to x as:

x=0.777

We can see that our decimal has three 7 digits after decimal, therefore, 1 digit is repeating after decimal.

When changing a percent to a decimal move the decimal already there over 2 spaces to the left. So 77.7% would be .777 in decimal form.

Paolo pays $244 for 5 identical calculators. About how much does Paolo pay for one calculator?

Answers

About $50 because if you round 244 to 250 (because 250 is easier to dived into 5 and is close to 244). Then you dived 250 into 5 which equals 50.
so you are going to add and it will be 30 for your answer

URGENT!!! HELPGina has purchased 100 songs from the internet. She plans to download an equal number of songs on her music player each week for 5 weeks. The graph shows the number of songs left to download, y, for a certain number of weeks, x:

(Graph attached below)

Part A: What is the rate of change and initial value of the function represented by the graph, and what do they represent in this scenario? Show your work to find the rate of change and initial value. (6 points)

Part B: Write an equation in slope-intercept form to model the relationship between x and y. (4 points)

Answers

Answer:

Initial value is 100

Step-by-step explanation:

A) rate of change would be dividing the number of songs wanted (100) by the number of weeks downloading (5)

100/5 = 20

 since the total quantity wanted is becoming less every week the rate of change would be negative so it becomes -20

Initial value is 100, which is the total number of songs they want

Answer:

Part A: 

initial value = 100 (total amount of songs to download)

rate of change = -20 songs/week (100-80 and so on)

Part B: 

y = -20x + 100

What are two solutions for 3f > 50

Answers

Answer:

30, 20

Step-by-step explanation:

Multiply a big number with 3. Such as 30, or 20.

30 x 3= 90

20 x 3=60
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