X^2 + 8 = 3<br>please help! show steps.

Calculate the area of triangle ABC with altitude CD, given A(−7, −1), B(−1, 5), C(0, 0), and D(−3, 3)

Snezhnost [94]

Answer:

A=25 (Rounded)

Step-by-step explanation:

The first step is to find the length of BA which is the base, then you have the find the length of CD, the hight.

To find the distance, you need to use the distance formula which is

$d=\sqrt{\left(x_{2}-x_{1}\right)^{2}+\left(y_{2}-y_{1}\right)^{2}}$ (It does not matter if A is x1 or is B is x1, it just has to remain consistent)

I am going to first find BA

$d=\sqrt{\left({-7}-{-1}\right)^{2}+\left({-1}-{5}\right)^{2}}$

Next, subtract accordingly

$d=\sqrt{\left({-7}+{1}\right)^{2}+\left({-1}-{5}\right)^{2}}$

$d=\sqrt{\left({-6}\right)^{2}+\left({-6}\right)^{2}}$

Once you do that, you want to square -6 and -6 which will give you

$d=\sqrt{\left({36}\right)+\left({36}\right)}$

Now add 36 with 36 which will leave you with

$d=\sqrt{{72}}$

Do that same thing for CD. If you did it right, you should be left with

$d=\sqrt{{18}}$

to find the area of a triangle, you must use the formula

$A=\frac{B*H}{2}$

The Base is $\sqrt{{72}}$ (BA) and the Hight is $\sqrt{{18}}$ (CD). substitute to get

$A=\frac{\sqrt{{72}}*\sqrt{{18}}}{2}$

Multiply the Base by the Hight to get

$A=\frac{\sqrt{{1,296}}}{2}$

Divide 1,296 by 2 to get

$A=\sqrt{{648}}$

Which is equal to

$A=25.455844122715710878430397035775$

Rounding it to the nearest whole number you get

A=25

Hope this helps. Feel free to ask any follow-up questions.

Have a good day! :)

6 0

3 years ago

Bart has these quiz scores: 78, 76, 74, 80, 82, 78, 82, 75, 77, 82. Bart tells his parents that his typical score is an 82. Whic

xxTIMURxx [149]

Answer:i cant help im sorry

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

HELP PLEASE -ILL GIVE BRILLIANT-

Usimov [2.4K]

Answer:

The cube will fit on the shelf.

Explanation:

If the volume is 10 cubic feet, then the height is around 2.1-2.2 feet high. One foot is 12 inches, so the height in inches is around 25.2-26.4 which is less than 30 inches.

6 0

3 years ago

Read 2 more answers

Malia is at an amusement park. She bought 14 tickets, and each ride requires 2 tickets. Write an expression that gives the numbe

mote1985 [20]

If x is the number of tickets she has left, then 2x is the number she has used (2×number of rides she has gone on). So the number she has left would be...

14 - 2x

We can now find an equivalent expression by replacing the x with a number... for example...

14 - 2(2)

This would be if she rode two rides. You could solve the equation like this...

14 - 2x =
14 - 2(2) =
14 - 4 = 10

After 2 rides she has 10 tickets left.

6 0

3 years ago

Urn 1 contains 7 red balls and 4 black balls. Urn 2 contains 3 red ball and 1 black ball. Urn 3 contains 5 red balls and 1 black

Marrrta [24]

Choice urn_1: 1/3
choice R: 5/8 ==>1/3*5/8=5/24
Choice urn_2: 1/3
Choice R: 3/4 ==> 1/3*3/4=1/4
Choice urn_3: 1/3
Choice R:4/6=2/3 ==> 1/3*2/3=2/9

Total: 5/24+1/4+2/9=15/72+18/72+16/72=49/72

Read more on Brainly.com - brainly.com/question/1904508#readmore

5 0

3 years ago

X^2 + 8 = 3please help! show steps.​

X^2 + 8 = 3please help! show steps.