3y - 5z = -23

1 answer:

8 0

Starting off, we can multiply the third equation by 2 and add it to the third to get rid of both the x and y variables. Next, we get z=1. Plugging that into 3y-5z=-23, we get 3y-5=-23. Adding 5 to both sides, we get 3y=-18. After that, we can divide both sides by 3 to get y=-6. Plugging that into -2x-y-z=-3, we get -2x+6-1=-3=-2x+5. Subtracting 5x from both sides, we get -2x=-8. After that, we can divide both sides by -2 to get x=4.

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1. (2,7); m=-4 What’s the answer?

Nataly_w [17]

Answer:

4x + y = 15 or y = -4x + 15

Step-by-step explanation:

7 = 2[-4] + b

-8

15 = b

$y = -4x + 15$

If you want it in Standard Form:

y = -4x + 15

+4x +4x

___________

4x + y = 15 >> Line in Standard Form

I am joyous to assist you anytime.

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3 years ago

Will, Mike, and Sue went to dinner. Will paid 1/3 of the dinner bill. Micah and Sue paid in the ratio 2:3. If Sue paid $6 more t

raketka [301]

Let's call their parts w,m and s

if will paid 1/3, then m+s=2w (they paid 2/3, which is twice as much as will did)

Now, we know that:
Micah and Sue paid in the ratio 2:3.
this means the 3m=2s

and m=2/3s

Again:
m+s=2w

and we substitute m:
2/3s+s=2w
5/3s=2w// multiply both sides by 3
5s=6w

we also know that s=w+6 (from the last sentence) so we substitute:

5(w+6)=6w
5w+30=6w
30=w

so, Will paid 30, Sue paid 36 (six more than him), Mike paid 24 (24:36 is the same ratio as 2:3, you can check this by dividing both 24 and 36 by 12: you have 2 and 3)

and the total was 30+36+24=90.

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3 years ago

0.8b = 1.12 HELP please please

timama [110]

B=1.4
Is the answer.

This is just for more characters

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3 years ago

Read 2 more answers

the distant between two towns is kilometers there are approximately 8 kilometers in 5 miles which measurement is closest to the

RUDIKE [14]

both towns are the same length because they are the same distance away from each other.

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