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GrogVix [38]
3 years ago
8

3x+5y=4, 2x-y=-7 solve using substitution

Mathematics
1 answer:
victus00 [196]3 years ago
6 0
 <span>3x+5y=4...(1)
 2x-y=-7...(2)
by(2) : y = 2x+7
subsct in (1) : 
3x +5(2x+7) = 4 
13x = - 31
x = -31/13
y = 2(-31/13)+7 = 29/13</span>
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The math club is fast becoming one of the most popular clubs on campus because of the fabulous activities it sponsors annually f
Sergeu [11.5K]

Answer:

The many members should the club expect to have 5 years from now is 167.

Step-by-step explanation:

The number of members in the club at present is, 45.

It is provided that each year the club's enrollment increases by 30%.

Compute the increasing rate as follows:

Rate=1+0.3=1.3

Then the number of members in the club after <em>n</em> years is given by the equation:

Number\ of\ members\ after\ n\ years=45\times (1.3)^{n}

Compute the number of members in the club after 5 years as follows:Number\ of\ members\ after\ 5\ years=45\times (1.3)^{5}\\=45\times (1.3)^{5}\\=45\times 3.71293\\=167.08185\\\approx167

Thus, the many members should the club expect to have 5 years from now is 167.

3 0
3 years ago
The sides of right triangle have a lengths of 5 centimeters,12 centimeters,and 13 centimeter.what is the area of the triangle?
Elan Coil [88]
It will be 13 x 12 x 5 which equals 780cm
6 0
3 years ago
Simplify the expression by combining like terms<br> 3x+4y+y-2x+11+8x
Firdavs [7]

Answer:

9x + 5y + 11

Step-by-step explanation:

3x + 4y + y - 2x + 11 + 8x

Group like terms

(3x - 2x + 8x) + (4y + y) + 11

Combine like terms

9x + 5y + 11

8 0
3 years ago
Which if the following is the equation of a line that passes through the points (2,5) and (4,3)
Taya2010 [7]
Hi there!

First, let's find the slope of the two points using the slope formula (y2 - y1 / x2 - x1).

S = 4 - 2 / 3 - 5
S = 2 / -2
S = -1

Next, we'll plug in the slope and a point into point-slope form (y - y1 = s(x - x1)) in order to find an equation. I will show the work using both points, which will result in two different equations.

(2,5)
y - 5 = -1(x - 2)
y - 5 = -x + 2
y = -x + 7

(4,3)
y - 3 = -1(x - 4)
y - 3 = -x + 4
y = -x + 7

The two equations came out the same! Which is completely okay, and happens sometimes. 

Hope this helps!! :)
If there's anything else that you're needing help with, don't be afraid to reach out!


3 0
3 years ago
Two cyclists start from 98 miles apart and begin racing toward each
kati45 [8]

The speed of one bicyclist was 14.5mph, speed of the other bicyclist was 17.5mph.

Let the speed of one bicyclist=x mph

Let the speed of the other bicyclist=(x+3) mph

Hence:

Speed of one bicyclist:

3x+3(x+3)+2=98

3x+3x+9+2=98

6x=87

Divide both side by 6x

x=87/6

x=14.5 mph

Speed of the other bicyclist:

x+3 mph

14.5 mph+3 mph

=17.5 mph

Inconclusion the speed of one bicyclist was 14.5mph, speed of the other bicyclist was 17.5mph.

Learn more here:

brainly.com/question/18839894

3 0
2 years ago
Read 2 more answers
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