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svetlana [45]
4 years ago
8

A fact family for 9,5,45

Mathematics
2 answers:
Sauron [17]4 years ago
8 0

9...45/5

5...45/9

45...9*5

alexgriva [62]4 years ago
4 0

Answer:

A fact family is a group of math facts using the same numbers. In the case of addition/subtraction, you use three numbers and get four facts. In this case we use multiplication and division.

Step-by-step explanation:

Multiplication: 9 x 5 is 45

Same as 5 x 9 is 45

Division: 45 ÷5 is 9

Same as 45÷9 is 5

Hope this helps :)

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Mariana [72]

Answer:

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Step-by-step explanation:

7 0
3 years ago
Solve for x. Use the completing the square method. x² + 8x = 7
AfilCa [17]
Divide the coefficient by 2 then square the quotient.
Add the result to both sides of the equation.

x^2 + 8x = 7
x^2 + 8x + (\frac{8}{2})^2 = 7 + (\frac{8}{2})^2
x^2 + 8x + 4^2 = 7 + 4^2
x^2 + 8x + 16 = 7 + 16
x^2 + 8x + 16 = 23


Now, factor the left-hand side.

x^2 + 8x + 16 = 23
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Take the square root of both sides.

(x + 4)^2 = 23
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4 0
4 years ago
Read 2 more answers
1. What is the measure of a central angle of a regular 15-gon? A. 24 degrees B. 156 degrees C. 2340 degrees D. 360 degrees
maw [93]
1. Make a circle in the middle and divide 360 by 15 = 24
2. B) 156
3. A) 24
4. C) 2340
5. D) 360
3 0
4 years ago
Which equations represent this fact family ? Check all that apply
yanalaym [24]

Answer:

9-11=20

and

20-11=9

Step-by-step explanation:

20+11=31, not 9- the first one is not the answer

20+9-29, not 11- the third is incorrect

11-20=-9, not 9- fifth is not it

6 0
3 years ago
How do you solve for x (ASAP)
algol13

Answer:

38 degrees

Step-by-step explanation:

5 0
4 years ago
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