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uranmaximum [27]
3 years ago
14

Solve the system of equations and choose the correct ordered pair.

Mathematics
2 answers:
Dafna1 [17]3 years ago
3 0

So for this, I will be doing the elimination method. Firstly, multiply both sides of the first equation by 2:

6x-8y=52\\2x+8y=-36

Next, add the two equations together to get 8x=16 . From here you can solve for x.

For this equation, just divide both sides by 8 and your first answer will be x=2

Now that we have the value of x, substitute it into either equation to solve for y:

3*2-4y=26\\6-4y=26\\-4y=20\\y=-5\\\\2*2+8y=-36\\4+8y=-36\\8y=-40\\y=-5

<u>In short, the solution is (2,-5), or A.</u>

slavikrds [6]3 years ago
3 0

3x-4y=26

2x+8y=-36

We will solve this system with gaus algorithm

We multiply first equation with number 2 and we get

6x-8y=52 => we add second equation to this and we get

8x=16 => x=2 => we replace x=2 in first equation and we get

3*2-4y=26 => 6-4y=26 => -4y=20 => y=-5

The correct answer is A.

Good luck!!!



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Andrew uses 630 one-inch unit cubes to completely fill the inside of a rectangular box. Which could be the dimensions of the box
dsp73

we have 630 one-inch unit cubes and we want to completely fill the rectangular box (unknown dimensions).

If all the cubes are fitted tightly inside rectangular box without living any space, then box volume would be equal to cubes volume.

There are 630 one-inch unit cubes, so volume of cubes = 630 cubic inches.

Now the volume of rectangular box would also be 630 cubic inches.

We know the formula for volume of rectangular box = length × width × height.

So we need to find any three positive integers whose product is 630.

Out of all given choices, only option A satisfies the condition of factors of 630.

Hence, option A i.e. (7 in x 9 in x 10 in) is the final answer.

7 0
3 years ago
Help ASAP, question below, 20 points
Talja [164]

Answer:

1 more lawn per hour

Step-by-step explanation:

Brian mows one lawn every hour while logan takes 4 hours to mow 2

Brian:

Hr 1                    1 Lawn

Hr 2                    2 Lawn

Hr 3                    3 Lawn

Hr 4                    4 Lawn

Logan:

Hr 1                    2 Lawn

Hr 2                    4 Lawn

Hr 3                    6 Lawn

Hr 4                    8 Lawn

4 0
2 years ago
(5v +37v2 - 80v - 69)/(v+9)
valina [46]

Answer:

-67-80v

Step-by-step explanation:

hope this helps!

3 0
3 years ago
SOLVE: 6^3x+2 = 4^x-5
Lilit [14]
There's an app called photomath that would be useful for these kinds of problems!
6 0
3 years ago
Solve for x in the equation x^2+4x-4=8
quester [9]
I will get you started.

x^2+4x-4 = 8

x^2 + 4x - 4 - 8 = 0

x^2 + 4x - 12 = 0

You must now use the quadratic formula.

In the formula, a = 1, b = 4, and c = -12.

Take it from here.
8 0
2 years ago
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