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Hitman42 [59]
3 years ago
6

4x+7y=8.77 8x+14y=15.80

Mathematics
1 answer:
marta [7]3 years ago
8 0
If i times the first equation by -2 that gives me -8x-14y=-17.54 8x+14y=15.80 Everything cancels out and I'm left with -1.74
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A line that passes through the point (–1, 3) has a slope of 2. Find another point on the line.
sineoko [7]
Easy, find the equation of the line,

Using y=mx+b form:

(-1,3) m=2

3= 2(-1)+b

3= -2+b
+2     +2

5=b

y=2x+5. This is your equation.

Now, plug in the coordinates:

(-3,2)

2= 2(-3)+5
2= -6+5
2= -1

NO

(0,5)

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5=5

YES

(1,5)

5= 2(1)+5
5= 2+5
5=7

NO

(1,4)

4= 2(1)+5
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Thus, B, is your answer.


5 0
3 years ago
From Midnight to 6 am the temperature rose 8 degrees C. At 6 am the temperature was -21 degrees C. What was the temperature at m
Alika [10]
Hello!

We know that from midnight to 6am the temperature went up 8° and at 6am it was -21°

To find what it was at midnight we have to work backwards

Since it went up we have to subtract 8 from -21

-21 - 8 = -29

The answer is -29°C

Hope this helps!
7 0
3 years ago
Read 2 more answers
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Darya [45]

Answer:

569,186,434

Step-by-step explanation:

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5 0
3 years ago
What is the equation for a line parallel to y=-4x-9 that passes through the point 0,8
Afina-wow [57]
Parallel = same slope
Y = -4x + b
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8 0
3 years ago
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topjm [15]

Answer:

2/3 full = 23 × 10 × 6 × \frac{2}{3}

            = 920 cm^3

8 0
3 years ago
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