What is a trick for multiplying 9`s

Answers

Answer 1

Answer: A trick that is good for multiplying 9's is, remember that each time the tens digit changes the number in the ones spaces minuses 1. If you don't understand what I am saying look at the following:-

9
18
27
36
45
54
63
72
81

See the pattern? In the tens place you need to add 1 and in the tens place you need to subtract by 1.

Hope I helped ya!! xD

Answer 2

Answer: This works for 9 times 1 through 9 times 10. You can take the number that is times 9 and and minis the number by one. Then you think about what number plus the first number ( the number that is times 9 and and minis the number by one) equals 9 and that number goes in the tens place. If you don't understand then look at this:
9×1=09
9×2=18
9×3=27
9×4=36
9×5=45
9×6=54
9×7=63
9×8=72
9×9=81
9×10=90

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I need help arranging cards in a 4 x 4 grid with numbers 1-9 so that the sum of each row and each column is 20. This what the grid looks like:

Answers

Answer:

8, 2, 8, 2

7, 3, 7, 3

6, 4 6, 4

9, 1, 9, 1

Step-by-step explanation:

In the picture, it shows two of each number so I'm gonna base it off the picture but let me know if I should base it off the wording.

So we know that half of 20 is 10. This will be valuable information. So we need the sum of two numbers to equal 10. So for the rows we can just do 8+2+8+2, 7+3+7+3, 6+4+6+4, 9+1+9+1.

Since there are 18 numbers, I'm assuming we don't have to use all of them.

Answer:

9, 1, 9, 1

2, 8, 2, 8

3, 7, 3, 7

6, 4, 6, 4

Step-by-step explanation:

you would have to have the numbers repeat so it works, for instance, you could do 9,1,9,1 as the first row then 2,8,2,8 as the second row and for the third row you could do 3,7,3,7 and for the fourth row you could do 6,4,6,4 so both the columns and rows add to 20

Which equation represents the graph of the linear function?A. y= -1/3x+1
B.y=-3x-1
C.y=3x+1
D.y=-3x+1

Answers

The answer is D because the y intercept is a positve one, and when you find the slope, it is -3. To find the slope, you can either pick two points on the graph and do y1 -y2 over x1-x2, or you can count the slope on the graph.

What is -7/9 x 3/5
PLEASE HELP

Answers

Your answer would be -7/15

-7/15
Reduce the 9 to 3 and the 3 to 1. Next, multiply straight across. Negative times positive = negative. Therefore, -7/9 x 3/5 = -7/15

3 pounds of gummy bunnies are selling for $4.00. How much will 2 pounds cost?

Answers

Most of the required important information's are already given in the question. Based on those given information's the answer to the question can be easily reached.
The cost of 3 pounds of gummy bunnies = $4
Then
The cost of 1 pound of gummy bunnies = (4/3) dollars
So
The cost of 2 pounds of gummy bunnies = (4/3) * 2 dollars
   = 8/3 dollars
   = 2 2/3 dollars
   = 2.67 dollars
So the cost of 2 pounds of gummy bunnies is 2 2/3 dollars or $2.67. I hope the procedure is simple enough for you to understand.

Find the greatest common factor of 25 and 33 .

Answers

factor and find commmon ones
25=1*5*5
33=1*3*11

GCF=1
(I am noticing that GCF=1 for many of your questions)

What is the answer to this question

Answers

x = 4 y = - 3

Substitute x for 4 and y for - 3

x² - 4y
2

4² - 4 *(- 3)
2

16 - ( - 12 )
2

16 + 12
2

28 = 14
2

Solution: 14

$(x^2-4y)/(2) = (4^2-4*(-3))/(2) = (16+12)/(2) = (28)/(2) =14$

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Use the number line to find the difference of 2 1/2 -9.

How are the values of the 3s in 33,000 related

2x3 + 4x -63x3 - 8x+7

Hayden is 59 inches tall and is standing on top of the ladder that is 2 yards talk in inches what is the distance from the top of Haydens head to the ground