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Scorpion4ik [409]
3 years ago
8

How do you know 8(12)-8(7)is the same as 8(12-7)

Mathematics
1 answer:
GarryVolchara [31]3 years ago
8 0

Answer:

Step-by-step explanation:

Here we're applying the Distributive Property of Multiplication.

8(12 - 7) = 96 - 56 = 40

Note that 8(12 - 7) = 8(5) = 40

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What is the missing constant term in the perfect square that starts with X^2 - 8x
xenn [34]

Answer:

16

Step-by-step explanation:

Perfect square in the quadratic from ax² + bx + c

You know an equation is perfect when:

2√(ax²)√(c) = bx

Substitute x² for ax² and 8x for bx. Then isolate c by doing the reverse operations.

2√(ax²)√(c) = bx

2√(x²)√(c) = 8x

2x√c = 8x   Divide both sides by 2x

√c = 4    Square both sides to isolate c.

c = 16

The missing constant term is 16.

Check answer:

x² - 8x + 16

(x - 4)²

= (x - 4)(x - 4)

= x² - 4x - 4x + 16

= x² - 8x + 16

3 0
3 years ago
Read 2 more answers
If b = 12 units and h = 4 units, then what is the area of the triangle
nataly862011 [7]

Answer:

The answer is Area=24

Step-by-step explanation:

You use the formula B*H/2=A

So 12*4=48/2=24

Hope this helps!

7 0
4 years ago
Read 2 more answers
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CaHeK987 [17]

Answer:

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4 0
3 years ago
. Dr. Abramson and her assistants are working on three different experiments using water. Each experiment lasts for 15 minutes.
Sonja [21]

Note that

  • 12=2·2·<u>3</u>;
  • 20=2·2·5;
  • 36=2·2·<u>3</u>·3.

The common factors of these three numbers are 2, 2. Also numbers 12 and 36 have one more common factor <u>3</u>, then the least common multiple is

LCM(12,20,36)=2·2·<u>3</u>·5·3=180 sec=3 min (here first you write all common factors between all three numbers, then between two numbers and at last all remaining factors).

Answer: all three experiments will need to be checked after 3 minutes passed, then after 6 minutes passed, then after 9 minutes passed and so on.

3 0
3 years ago
(3) 5th Grade Math Questions
Finger [1]
1. 13/15
2. 1595.25
3. 462
I hope it helps.
5 0
3 years ago
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