3 years ago

Help pls fast and give me the steps -15a-19-35=-84

Mathematics

1 answer:

Nimfa-mama [501]3 years ago

8 0

Answer:

a=2

Step-by-step explanation:

-15a-19-35=-84

-15a-19=-49

-15a=-30

a=2

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3 root square 512<br> =

cluponka [151]

Answer:

∛(512)= 8

Step-by-step explanation:

∛(512)=∛(8³)= 8

512 = 2*256=2*2*128= 2*2*2*64 = (2*2*2)*8*8 = 8*8*8=8³

5 0

3 years ago

Look at picture. What is the solution WORTH 10 points. Show work.

lakkis [162]

$\left\{\begin{array}{ccc}2x-y=6\\2x-2y=4&|\text{add 2y to both sides}\end{array}\right\\\left\{\begin{array}{ccc}2x-y=6\\2x=4+2y&|\text{divide both sides by 2}\end{array}\right\\\left\{\begin{array}{ccc}2x-y=6\\x=2+y\end{array}\right\\\\\text{Substitute x=2+y to the first equation}\\\\2(2+y)-y=6\ \ \ \ |\text{use distributive property}\\(2)(2)+(2)(y)-y=6\\4+2y-y=6\\4+y=6\ \ \ \ \ |\text{subtract 4 from both sides}\\\boxed{y=2}\\\\\text{Put the value of y to the second equation}\\\\x=2+2\\\boxed{x=4}$