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marin [14]
3 years ago
6

The temperature at 7 a.m. was –11°C. The temperature increased by 9°C during the day and then decreased by 4°C at 8 p.m. Which w

as the temperature at 8 p.m.?
A.2°C


B.–6°C


C.–16°C


D.–24°C
Mathematics
2 answers:
vagabundo [1.1K]3 years ago
6 0
A or B but im mot that smart
horrorfan [7]3 years ago
3 0

Answer:

-6

Step-by-step explanation:

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Write an equation in standard form of the line that contains the point (-1,2) amd is perpendicular to y = 3x - 1
Strike441 [17]
Since it is perpendicular to y=3x-1, the slope must be a negative reciprocal.
there the slope of the perpendicular line is -\frac{1}{3} x

So now we have, 
y=- \frac{1}{3} x+b

To find b, we use the point that the line passes through and substitute it to the y and x values.

2=- \frac{1}{3} (-1)+b

which would give us b=5/3

Therefore, the equation of the line is 
y=- \frac{1}{3} x+ \frac{5}{3}
7 0
3 years ago
4. – 2y = -5<br>10.x + 20y = -2​
kari74 [83]

Answer:

10 • (x - 2y + 3z)

? if thats the answer.

and   y = 5/2 = 2.500 for the - 2y = -5 one. if they are both combined please comment under mine.

4 0
3 years ago
How many solutions does the equation below have?
Elina [12.6K]

Answer:

1.one solution is the answer

Step-by-step explanation:

3 0
3 years ago
Please help!!!!!
sergeinik [125]

-8.1

Step-by-step explanation:

\frac{ - 4}{9} x + 2.4 = 6

<em>Times </em><em>all </em><em>by </em><em>9</em><em> </em><em>to </em><em>get </em><em>rid </em><em>of </em><em>fraction</em>

<em>- 4x + 21.6 = 54</em>

<em>Take </em><em>2</em><em>1</em><em>.</em><em>6</em><em> </em><em>away</em><em> </em><em>from</em><em> </em><em>both</em><em> </em><em>sides</em>

<em>- 4x = 32.4</em>

<em>Divide</em><em> </em><em>by </em><em>-</em><em>4</em>

<em>x =  - 8.1</em>

8 0
2 years ago
Read 2 more answers
.....................​
Alex Ar [27]

Answer:

...?

Step-by-step explanation:

7 0
4 years ago
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