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ozzi
3 years ago
14

Explain how you could add 678 + 303 using mental math

Mathematics
2 answers:
Bad White [126]3 years ago
6 0
Okay well I do it like this. 3+8=11. I put a 1 down and carry the other. so I do 7+0+1=8 so now I have 81, and last I do 6+3=9. so the answer would be 981.


Have a nice day!
bezimeni [28]3 years ago
4 0
Add the hundreds first then the tenths then the units. so add 600 +300 which is 900 then 70 +0 which is 70 then 8+3 which is 11 then add them all up which is 981.
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5 0
3 years ago
Find the point on the plane 4x+3y+z=10 that is nearest to​ (2,0,1). What are the values of​ x, y, and z for the​ point? x= 28 /
MariettaO [177]

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\frac{1}{\sqrt{26}}.

Step-by-step explanation:

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4 0
2 years ago
Find all solutions to each quadratic equation
romanna [79]
I hope this helps you



2x^2-4x+7=0 a=2 b=-4 c= 7



disctirminant =b^2-4ac


disctirminant =(-4)^2-4.2.7


disctirminant = 16-56= -40


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x=2+square root of (-10)/2


x'=4 -2 square root of (-10)/4


x'=2 -square root of (-10)/2
6 0
2 years ago
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