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const2013 [10]
3 years ago
13

What should be the first step in adding these equations to eliminate y 8x+3y= 2 + 4x-by=-7

Mathematics
1 answer:
Shtirlitz [24]3 years ago
5 0

Answer:

Step-by-step explanation:

Are you sure you wanted that "b" in the second equation?

If so, here's how we eliminate y:

1) Multiply the first equation by b:  8bx + 3by = 2b

2) Multiply the second equation by 3:  12x - 3by = -21

3) Combine these two results.  We get:

(8b + 12)x = 2b - 21

Here we have eliminated  y, but still have an equation in two variables, b and x.

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How to solve for x??
Naddika [18.5K]

Answer:

17

Step-by-step explanation:

The sum of a polygon's angles is 180° (n − 2), where n is the number of sides.  A hexagon has 6 sides, so the sum of the angles is:

180° (6 − 2) = 720°

Therefore:

720 = 8x − 1 + 5x + 36 + 116 + 7x + 19 + 6x − 2 + 110

720 = 26x + 278

26x = 442

x = 17

8 0
3 years ago
Are and circumfrence of a circle with radius 4 inches​
svlad2 [7]

Answer:

area = 50.27 sq inches

circumference = 25.14 in

Step-by-step explanation:

given radius r = 4 in

area = πr² = 3.142 x 4² = 50.27 square inches

circumference = 2πr = 2 x 3.142 x 4 = 25.14 inches

3 0
3 years ago
- 3/8 + 1/6 plss help
Serjik [45]

Answer:

-5/24

Step-by-step explanation:

-3/8 =

-9/24

1/6 =

4/24

-9/24+4/24=-5/24

5 0
3 years ago
Read 2 more answers
An account is opened with $7,595.96 with a rate of increase of 2% per year. After 1 year, the bank account contains $7,746.90. A
Sav [38]

Answer:

It's C

Step-by-step explanation:

y = 7,595.96(1.02)x

the initial beginning value times .02 after adding 1 to it so you would get 1.02 instead since it's an increase raised by x which indicates how many years it was to reach the new value.

3 0
3 years ago
Read 2 more answers
SOMEONE PLEASE EXPLAIN!!
just olya [345]

To find if something is a parallelogram, they 1 set of line segments need to have the the slope. In this equation, Slope equals x1 + x2 divided by y1 + y2 (Or the other way around, x2 + x1 divided by y2 + y1)

m =  \frac{( - 3 + 1)}{ ( 1 + 3)}  =  \frac{ - 2}{4}  =  -  \frac{1}{2}

For your other point, it could be (-4,5)

If this is confusing, please tell me! I'll try to better explain. It also helps to draw out a graph so you can plot the points.

6 0
3 years ago
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