2 years ago

How do You do solving system of equations by solving for a variable

1 answer:

6 0

Well, you have to do it with the substitution method now it's not easy, it takes some time to get used to it. I'm not really sure how to explain it but if you go on Khan Academy it will show you how to do it.

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Help please I really need help :)

Firdavs [7]

Answer:

Solution given:

For 1st

x²=71

For x=± $\sqrt{71}$

and

For 2nd

x³=71

For x=± $\sqrt[3]{71}$

So answer is:

In first row

Solution to x²=71

In second row

Solution to x³=71

In third row

neither

In forth row

Solution to x³=71

6 0

2 years ago

Am nev de acest ex urgent va rog

never [62]

Serach it, Thats what I did!

6 0

3 years ago

Erin feeds her dog 7/10 cup of food a day . With 3/10 cup canned and the rest dry . She also gives her dog 1 treat a day . How m

gavmur [86]

Answer:

$2\frac{4}{5}\ \ or \ 2.8 \ \ cups$

Step-by-step explanation:

-The total portion fed to the dog is 7/10 cup

Canned-3/10
Dry=7/10-3/10=4/10

-One week has 7 days. we multiply the dry portion per day by the number of days in a week.

$Dry= Total -Canned\\\\=\frac{7}{10}-\frac{3}{10}\\\\=0.40 \ cup\\\\Dry \ per \ Week= Dry/ day\times days\\\\=0.40\times 7\\\\=2\frac{4}{5}\ or\ 2.8 \ cups$