2x-y =3
multiply by 4
8x - 4y = 12
3x +4y = 10 (unchanged equation)
------------------add
11x = 22

answer is A. the first.
first equation multiplied by 4 then sum to get 11x = 22

3 0

3 years ago

Express each number in scientific notation. 18 8,888,800

Olenka [21]

$scientific\ notation:a\cdot10^n\ where\ a\in[1;\ 10)\ and\ n\in\mathbb{Z}\\==================================\\\\1\underbrace{8}_{\leftarrow1}=1.8\cdot10^{1}\\\\8\underbrace{,888,800}_{\leftarrow6}=8.888800\cdot10^6=8.8888\cdot106$

8 0

3 years ago

Read 2 more answers

C. Ben and Michael also participated in the long jump. Michael jumped 334 thousandths of a meter less than Kevin. Ben jumped far

Nikitich [7]

Answer:

Micheal = Kevin - 334mm

Kevin > Ben > Micheal

so you add smthing less than 334mm to Micheal's distance that is not a negative number

4 0

3 years ago