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3 years ago

How do you solve -6x+3y=1 and 6x+4y=-10 using elimination/substitution

Mathematics

1 answer:

Llana [10]3 years ago

5 0

Answer:

Step-by-step explanation:

Add them : 7y=-9

y=-9/7

6x-36/7=-10

6x=-10+36/7

x=-6.28571428571/6=1.04761904762

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M is the incenter of triangle ABC. Find the lengths of MD and DC. (Look at pic)

Deffense [45]

Answer:

Part 1) $MD=9\ units$

Part 2) $DC=12\ units$

Step-by-step explanation:

Step 1

Find the length of MD

we know that

The incenter is the intersection of the angle bisectors of the three vertices of the triangle. Is the point forming the origin of a circle inscribed inside the triangle

In this problem

$MD=ME=MF$ ------> is the radius of a circle inscribed inside the triangle

we have that

$MF=9\ units$

therefore

$ME=9\ units$

$MD=9\ units$

Step 2

Find the length of DC

we know that

In the right triangle MDC

Applying the Pythagoras theorem

$MC^{2} =MD^{2}+DC^{2}$

we have

$MD=9\ units$

$MC=15\ units$

substitute

$15^{2} =9^{2}+DC^{2}$

$DC^{2}=225-81$

$DC=\sqrt{144}\ units$

$DC=12\ units$

6 0

4 years ago

HELPPPP I NEED TO PASSSS!!!!! MARK BRAINLIEST!!!

sineoko [7]

When r is closest to 1, it is a strong positive correlation. When r is closest to -1 it is a strong negative correlation. When r is about 0.8 or anything similar, it is a weak positive. Similar to if r is -0.8 it would be a weak negative correlation. Hope this helps.

8 0

3 years ago

a computer costs $849.75 and the hard drive is 61.3% of the total cost what is a reasonable estimate for the cost of the hard dr

kati45 [8]

Answer:

$510 you get this answer by first rounding $849.75 to $850 and rounding 61.3% to 60% then multiply $850 and .6 to get your answer $510

Step-by-step explanation:

hello no explanation lol

7 0

3 years ago

Which equation results from adding the equations in this system? 11 x minus 3 y = -17. Negative 4 x + 3 y = - 18.

marta [7]

Answer:

Therefore the results from adding the equation in this system is

$7x=-35$

Step-by-step explanation:

Given:

Equations as

$11x-3y=-17$ .......................1

$-4x+3y=-18$ .......................2

To Find :

Result when adding equation 1 and 2 = ?

Solution

On adding equation 1 and 2 the "3y" term will get cancel and the like terms will combine that is add (11x and -4x ) and ( -17 and - 18) as shown below

11x - 3y = -17

-4x + 3y = - 18

-------------------------------------------

7x + 0 = - 35

---------------------------------------------

Therefore the results from adding the equation in this system is

$7x=-35$

7 0

3 years ago

Read 2 more answers

What is the value of x? 0.9(x 1.4)−2.3 0.1x=1.60.9(x 1.4)−2.3 0.1x=1.6 enter the answer as a decimal

Fantom [35]

0.9(x + 1.4) - 2.3 + 0.1x = 1.6
0.9x + 1.26 - 2.3 + 0.1x = 1.6
x - 1.04 = 1.6
x = 1.6 + 1.04 = 2.64
x = 2.64

7 0

3 years ago

Read 2 more answers