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3 years ago

-5x + y = -2, -3x + 6y = -12 solve each system by substitution

Mathematics

1 answer:

Harlamova29_29 [7]3 years ago

4 0

Answer:

Point Form:

(0,-2)

Equation Form:

x=0, y=-2

Step-by-step explanation:

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Pls help!!

AleksAgata [21]

Answer:

11.25

Step-by-step explanation:

15x3/4=45/4=11.25pounds

8 0

3 years ago

After 3 minutes, a submarine had descended to −320 feet. After 8 minutes, the submarine had descended to −420 feet. Assuming a l

LiRa [457]

Answer:

$d(t) = -20t - 260$

Step-by-step explanation:

The depth function is:

$d(t) = mt + b$

After 3 minutes, a submarine had descended to −320 feet.

This means that $d(3) = -320$ . So

$d(t) = mt + b$

$-320 = 3m + b$

After 8 minutes, the submarine had descended to −420 feet.

This means that $d(8) = -420$ . So

$d(t) = mt + b$

$-420 = 8m + b$

From the first equation:

$b = -320 - 3m$

$-420 = 8m + b$

$-420 = 8m - 320 - 3m$

$5m = -100$

$m = \frac{-100}{5}$

$m = -20$

And

$b = -320 - 3*(-20) = -260$

$d(t) = -20t - 260$

7 0

3 years ago

How would I solve for x?

vaieri [72.5K]

Answer:

$x = 65$

Step-by-step explanation:

First, we calculate the unknown angle of the left triangle and right triangle: $180 - 62 - 50 = 68$

Unknown angle for left triangle⬆️

$180 - 80 - 53 = 47$

Unknown angle for right triangle⬆️

Now we've calculated the two angles for the small triangle in the middle. So, we just have to calculate the top angle of the middle triangle:

$180 - 68 - 47 = 65$

The angle 65° and angle of x are vertical angle.(both are equal)

So... x= 65°

hope it helps :)

4 0

3 years ago

What is the slope of the line that passes through the points (−3, 1) and (1, −5) ?

kari74 [83]

Answer:

$m = \frac{ - 5 - 1}{1 + 3} = - \frac{6}{4} = \color{green} \boxed{ - \frac{3}{2} }$

8 0

3 years ago

if the recipe takes 60 minutes to cook at a temperature of 350 degrees how many minutes would it take at 200 degrees

Lady_Fox [76]

Answer:

34.28 minutes

Step-by-step explanation:

60:350=x:200

12000=350x

x=34.28

5 0

3 years ago

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