3 years ago

X+7z=16 3x+y=8 y-7z=-12

1 answer:

8 0

$x = 16 - 7z \\ \ \\ \ 3(16 - 7z) = 8 \\ 48 - 21z = 8 \\ - 21z = - 40 \\ z = \frac{40}{21} \\ \\ \\ y - 7( \frac{40}{21} ) = - 12 \\ y - \frac{40}{3} = - 12 \\ y = - 12 + \frac{40}{ 3} \\ y = \frac{4}{3}$

You might be interested in

Which shows two expressions that are equivalent to (-7) (- 15) (-5)?

Verizon [17]

Answer:

1add 1 o 3

Step-by-step explanation:

make sure u add

3 0

4 years ago

Bridget, Brian & Caroline share some money in the ratio 4 : 9 : 4.

poizon [28]

Answer:

the answer is 54

Step-by-step explanation:

48 / 4 is 12, so then divide that by 2 so they split equally because theirs combined added to 48, so 6.

6 * 9 is 54

7 0

3 years ago

A slot machine has three slots; each will show a cherry, a lemon, a star, or a bar when spun. The player wins if all three slots

Verdich [7]

Which subject is it?

7 0

3 years ago

I am in 9th grade,if you have 889,865x999,786 what doe it equal also yes i am not in virtual school and teacher will not let me

RSB [31]

Answer:

889674568890

Step-by-step explanation:

I used a calculator :)

6 0

3 years ago

If t=38.5 and s=31.4 find S. Round to the nearest tenth

zubka84 [21]

<u>Answer:</u>

The correct answer option is C. S = 54.6°.

<u>Step-by-step explanation:</u>

We are given a right angled triangle with two known sides, $s$ and $t$ .

We are to find the value of the angle $S$ .

For that, we will use sine.

$sin S = \frac { s } { t }$

$sin S = \frac { 3 1 . 4 } { 3 8 . 5 }$

$S = sin'0.815$

S = 54.6°

8 0

3 years ago

Read 2 more answers