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MrMuchimi
3 years ago
9

Solve the system of equations is given below 2x+3y=18 x+7y=31

Mathematics
1 answer:
Veronika [31]3 years ago
3 0
{2x + 3y = 18
x + 7y = 31}


2x+ 3y = 18
x=31-7

2(31-7)+3y=18

y=4

x=31-7*4
x=3

(x,y) = (3,4)
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a box half full of apples weighs 40kg and the same box one fifth full weighs 22kg. what does the box weigh when empty?
likoan [24]
So in order to answer your question  we calculate 40 - 22 wich gives us the answer of 18, so now we can say that 4/5 of apples weight 18 so now 18 / 4 = 4,5; 4,5 * 5 = 22,5 wich is the weight of apples you can put in the box, to know the answer we deduct the greatest weight of apples only from the weight of the box with those apples so, 40 - 22,5 = 17,5
so the answer to your question is 17,5
i hope i helped you
6 0
3 years ago
-2(x-5)=6(2- 1/2x)<br><br> Please show your work. Distributive property, remove variable
schepotkina [342]

The solution of given equation is x=2

Further explanation:

In order to solve the given equation we have to isolate the variable x on one side of the equation. The process will involve distributive property and simplification.

Given:

-2(x-5)=6(2-\frac{1}{2}x)\\Apply\ distributive\ property\\-2x-2(-5)=(6)(2)-(6)(\frac{1}{2}x)\\-2x+10=12-\frac{6}{2}x\\-2x+10=12-3x\\-2x+3x=12-10\\x=2

The solution of given equation is x=2

Keywords: Linear Equation, Distributive property

Learn more about linear equations at:

  • brainly.com/question/10169676
  • brainly.com/question/10208427

#LearnwithBrainly

6 0
3 years ago
Solve each system by elimination. -8x14y=-14. 5x+7y=0<br><br>help me solve this please.
katrin2010 [14]
The answer is (7/9, -5/9)

(7 over 9 and negative 5 over 9)
8 0
3 years ago
Read 2 more answers
Jerome bought 15 videos from a department store. Some videos were new releases, x, which cost $19, and some videos were classics
Neporo4naja [7]

Answer:

The system of equations is

x+y=15

19x+8y=164

Step-by-step explanation:

Let

x------> the number of videos of new releases

y-----> the number of classics videos

we know that

x+y=15 ------> equation A

19x+8y=164 ------> equation B

Using a graphing tool

Solve the system of equations

Remember that the solution of the system of equations is the intersection point both graphs

The intersection point is (4,11)

see the attached figure

therefore

the number of videos of new releases is 4

the number of classics videos is 11

3 0
3 years ago
Read 2 more answers
Find the point-slope equation for
mars1129 [50]

Answer:

y-24=m(x--4)

Step-by-step explanation:

point slope form:

y-y₁=m(x-x₁)

1) find the slope or "m" first:

slope formula: (y2-y1)/(x2-x1)

(-53-24)/7+4

-77/11=-7

slope=-7

so

y-y₁=-7(x-x₁)

y1=24

x1=-4

y-24=m(x--4)

hope this helps!

8 0
3 years ago
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