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stira [4]
3 years ago
11

Solve the simultaneous equation: 3x+y=-4 3x-4y=6

Mathematics
1 answer:
Verdich [7]3 years ago
7 0

3x+y=-4

3x-4y=6

--------------subtract

5y = -10

y = -2

Substitute y = -2 into 3x + y = -4

3x + (-2) = -4

3x - 2 = -4

3x = -2

 x = -2/3

Answer

Solution x = -2/3, y = - 2 OR (-2/3 , - 2)

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24 is how many whole number factors
Tanya [424]
Factors: 
<span>1 x 24 </span>
<span>2 x 12 </span>
<span>3 x 8 </span>
<span>4 x 6 </span>

<span>Hence, 24 should have 8 whole number factors. </span>
<span>(Factors: 1, 2, 3, 4, 6, 8, 12, 24.)</span>
7 0
3 years ago
Give the area of a rectangle that has a length of 8 and a width of 9.
frez [133]

Answer:

72

Step-by-step explanation:

  1. L × W = A
  2. 8 × 9 = A
  3. 8 × 9 = 72

I hope this helps!

6 0
3 years ago
Find an equation of the vertical line through (3 comma negative 1 )in the form axplusbyequals​c, where​ a, b, and c are integers
Sati [7]

The equation of the vertical line is 1x+0y=3

Explanation:

It is given that the vertical line passes through the points (3,-1)

For vertical line, the slope is undefined.

Hence, b=0

Let us substitute the coordinate (3,-1) in the equation ax+by=c, we have,

3a+0y=c

Simplifying, we have,

3a=c

3=\frac{c}{a}

where a=1 and c=3

Substituting the values of a, b and c in the equation ax+by=c, we have,

1x+0y=3

Thus, the equation of the vertical line is 1x+0y=3

8 0
3 years ago
I'm confused I put 13-x and it said incorrect?? HELP!
Andreas93 [3]

Answer:

Maybe -12?

Step-by-step explanation:

Because sometimes variables on their own symbolize 1, so we can subtract 13 from 1 to get -12.

5 0
3 years ago
Read 2 more answers
Plsssssss can you guys help me?
NikAS [45]
D: 657.825
Start by converting 5 1/4 to a decimal. I’m assuming you have memorized 1/4 as a decimal, but if you haven’t yet, it’s 0.25. Add 0.25+5=5.25
One bag covers 125.3 ft square, but we have 5.25 bags. Change the one to 5.25 and multiply by 125.3.
Multiply 5.25x125.3
It equals 657.825
Hope this helps, reach out if you’re still confused!
4 0
2 years ago
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