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3 years ago

The midpoint of CD Is M=(-3, 1). One endpoint is C=(-7, 7).

Mathematics

1 answer:

garik1379 [7]3 years ago

8 0

Answer:

Step-by-step explanation:

(x - 7)/2 = -3

x - 7 = -6

x = 1

(y + 1)/2 = 1

y + 1 = 2

y = 1

(1, 1)

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The sides of a triangle measures 7,8, and 12. Which type of triangle is it?

Alona [7]

It would be an obtuse triangle hope this helps=D

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3 years ago

A thermometer is taken from a room where the temperature is 23oC to the outdoors, where the temperature is −9oC. After one minut

Helga [31]

Answer:

$(a)\ 15\textdegree C\\(b)\ After\ 3\ minutes\ and\ 52.5\ Seconds\ from\ start$

Step-by-step explanation:

Temperature in the room $=23\textdegree C$

Decrease in the temperature(outdoors) $=23-15=8\textdegree C$ in $1\ minute$ .

Rate of decrease $=8\textdegree C/minute$

$Let\ after\ x\ minutes\ temperature\ is\ y\\y=23-8x\ \ \ \ y\geq -9\textdegree C$

(a) After $4\ more\ minutes\ total\ time\ is=1+4=5\ minutes$

$y=23-5\times 8\\y=-17\\$

But it is not possible as outdoor temperature is $-9\textdegree C$ so after $-9\textdegree C$ temperature decrease will not occur.

Hence after $4$ more minutes temperature= $-9\textdegree C$

(b) Let after $t\ minutes$ temperature is $-8\textdegree C$

Here $x=t,\ y=-8\textdegree C$

$-8=23-8x\\8x=23+8\\8x=31\\x=\frac{31}{8}\\x=3.875\ minutes=3\ minutes\ and\ 52.5\ seconds$

3 0

3 years ago

Ahhh help please find the perimeter

spin [16.1K]

Answer:

12 $x^{2}$ + 6y

Step-by-step explanation:

3 0

3 years ago

One year, the population of a city was 354,000. Several years later it was 407,100. Find the percent increase.

tekilochka [14]

Answer:

15%

Step-by-step explanation:

GIven data

Initial population= 354,000

Final population=407,100

%Error= Final- Initial/initia*100

%Error= 407,100- 354,000/ 354,000*100

%Error= 53100/ 354,000*100

%Error=0.15*100

%Error=15%

Hence the error is 15%

4 0

3 years ago

, 4), perp. to y=-2x - 4

AVprozaik [17]

Answer:

+1/2

Step-by-step explanation:

If the slope of the given line is -2, the slope of a line perpendicular to the given line is the negative reciprocal of -2, or +1/2.

7 0

3 years ago