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Savatey [412]
3 years ago
13

Explain how you could add 678 + 303 using mental math

Mathematics
1 answer:
ra1l [238]3 years ago
3 0
Add 8+3=11
7+0=7
6+3=9
=981
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(3x+1)^2-2(3x+1)(3x+5)^2+(3x+5)^2 ​
Savatey [412]

Answer:

soln,

write the question

=9x^2+1-6x-2×9x^2+25+9x^2+25

=9x^2+1-6x-18x^2+25+9x^2+25

=9x^2-18x^2+9x^2+1+25+25-6x

=51-6x

if(3x+1)^2 mean that (3x+1)has power of 2 and u don't have to use the formula this is the answer

Step-by-step explanation:

it's just BODMAS method

6 0
2 years ago
Can someone help with this question please?
givi [52]
The answer which i calculated is suppose to be 13182ax

5 0
3 years ago
Simplify the following expression 8x+9-6x-7
mamaluj [8]
8x + -6x = 2x 2 + 2x
4 0
3 years ago
Read 2 more answers
Harold bought 20 toys for his nieces and nephews. The least expensive toy cost $6.19, and the most expensive toy cost $9.81. Whi
nikklg [1K]

Answer:

160 dollars

Step-by-step explanation:

So you would add 6.19 and 9.81 together. Then divide it by 2.  You would get 8. Then multiply it by 20 and you would get 160 dollars

8 0
3 years ago
1/5 x = 12 plz help im not very good with math
IceJOKER [234]

Answer:

Step-by-step explanation:

1/5x = 12

x = 12 × 5

x = 60

( By using transposing method )

Plz mark it as brainliest

You can recheck it by calculating

60/5= 12

5 0
3 years ago
Read 2 more answers
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