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3 years ago

PLEASE ANSWER. ill mark most brainliest.

Mathematics

2 answers:

yKpoI14uk [10]3 years ago

4 0

Answer:

the answer is C

Step-by-step explanation:

sdas [7]3 years ago

3 0

Your answer will be C

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How to find the orthocenter of an obtuse triangle

Yuliya22 [10]

Find the equations of 2 segments of the triangle Once you have the equations from step #1, you can locate the slope of the corresponding perpendicular lines.You will use the slopes you have found from step #2, and the corresponding opposite vertex to find the equations of the two lines.Once you have the equation of the two lines from step #3, you can solve the corresponding x and y, which is the coordinates of the orthocenter.

3 0

3 years ago

Which expression is equivalent to 2x + x2 + 3x + 5x2 - 10x?

masha68 [24]

Add similar terms:
(2x + 3x - 10x) + (5x² + x²) = -5x + 6x² (ANSWER: C)

6 0

4 years ago

Read 2 more answers

You and a friend play a game where you each toss a balanced coin. If the upper faces on the coins are both tails, you win $1; if

oksian1 [2.3K]

Answer: The mean and variance of Y is $0.25 and $6.19 respectively.

Step-by-step explanation:

Given : You and a friend play a game where you each toss a balanced coin.

sample space for tossing two coins : {TT, HT, TH, HH}

Let Y denotes the winnings on a single play of the game.

You win $1; if the faces are both heads

then P(Y=1)=P(TT)= $\dfrac{1}{4}=0.25$

You win $6; if the faces are both heads

then P(Y=6)=P(HH)= $\dfrac{1}{4}=0.25$

You loose $3; if the faces do not match.

then P(Y=1)=P(TH, HT)= $\dfrac{2}{4}=0.50$

The expected value to win : E(Y)= $\sum_{i=1}^{i=3} y_ip(y_1)$

$=1\times0.25+6\times0.25+(-3)\times0.50=0.25$

Hence, the mean of Y : E(Y)= $0.25

$E(Y^2)=\sum_{i=1}^{i=3} y_i^2p(y_i)\\\\=1^2\times0.25+6^1\times0.25+(-3)^2\times0.5\\\\=0.25+1.5+4.5=6.25$

Variance = $E[Y^2]-E(Y)^2$

$=6.25-(0.25)^2=6.25-0.0625=6.1875\approx6.19$

Hence, variance of Y = $ 6.19

6 0

4 years ago

Keith is racing his little sister Pattie and has given her a 15 foot head start. She runs 5ft/sec and he is chasing at 8ft/sec.

hodyreva [135]

Pattie runs at 5 ft/sec
She has got a head start of 15 feet.
So after 1 second, Pattie runs = (5+15) ft 
 = 20 ft
After 2 second Pattie runs = (20+5)ft
 = 25 ft
After 3 second Pattie runs = (25+5) ft
 = 30 ft
After 4 seconds Pattie runs = (30+5) ft
 = 35 ft
After 5 seconds Pattie runs = (35+5) ft
 = 40 ft
After 6 seconds Pattie runs = (40+5) ft
 = 45 ft
Now Keith runs at 8 ft/sec
After 1 second Keith runs = 8 ft
After 2 second Keith runs = (8+8) ft
 = 16 ft
After 3 second Keith runs = (16+8) ft
 = 24 ft
After 4 second Keith runs = (24+8) ft
 = 32 ft
After 5 second Keith runs = (32+8) ft
 = 40 ft
After 6 second Keith runs = (40+8) ft
 = 48 ft
So Pattie will stay ahead of Keith upto 4 seconds. In the 5th second Pattie and Keith will be level and in the 6th second Pattie will be overtaken by Keith.

8 0

4 years ago

Toni is shopping for clothes at the store she buys 8 shirts for $8.00 what is the unit rate for the shirts?

lozanna [386]

Answer:

$1.00

Step-by-step explanation:

The unit rate in this scenario would be $1.00 , meaning that Toni is paying $1.00 for every shirt. This can be calculated by dividing the total price that she is paying for the shirts by the total number of shirts that Toni is purchasing like so...

$8.00 / 8 = $1.00 per shirt

The unit rate is basically the value over the denominator of 1 which would be the case as seen above since $1 buys 1 shirt ( $\frac{1 dollar}{1 shirt}$ ) as opposed to $8 dollars 8 shirts ( $\frac{8 dollars}{8 shirts}$ ) as mentioned in the question.

8 0

4 years ago