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Aleksandr [31]
3 years ago
5

Greg bought 2 boxes of balloons he used half of them to decorate his yard he used 40 to decorate his porch he used the rest insi

de his house how many balloons did he use
Mathematics
1 answer:
Dominik [7]3 years ago
3 0
You need more information like how many balloons there per box.we suppose it is 100. And we know that he uses 1 box for yard.Then you use 100-40 to get the answer 60.
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Solve each system by substitution. Check your answers.<br> 4x+2y=7 , y = 5x
Kazeer [188]

By substitution, the solution of the system of equations, 4x + 2y = 7 and y = 5x, is (1/2 , 5/2).

A system of linear equations is a set of two or more equations which includes common variables. To solve system of equations, we must find the value of the unknown variables used in the equations that must satisfy both equations.

There are three methods that can be used to solve system of linear equations.

1. Elimination

2. Substitution

3. Graphing

Using substitution method, given two linear equations in x and y,

4x + 2y = 7     (equation 1)

y = 5x     (equation 2)

Since the second equation is already expressed in y in terms of x, substitute the second equation to the first equation.

4x + 2y = 7     (equation 1)

4x + 2(5x) = 7

4x + 10x = 7

Combining all terms containing the variable x on one side and the constants on the other side of the equality, and solving for x.

4x + 10x = 7

14x = 7

x = 1/2

Substitute the value of x in the second equation and solve for y.

y = 5x

y = 5(1/2)

y = 5/2

Hence, the solution of the given system of equations is (1/2 , 5/2).

To learn more about solving systems of equations: brainly.com/question/25869125

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5 0
1 year ago
Which is expression is equivalent to 7(x+4)
Pepsi [2]

Answer:7x+28

Step-by-step explanation:

7×x = 7x

7×4 = 28

8 0
3 years ago
Imagine telling a guy you liked him. He tells you he has feelings for you but he likes your best friend. But, your best friend l
kirza4 [7]

Answer:get with your older brother

Step-by-step explanation:

7 0
3 years ago
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Write an equation in slope intercept form for the line that passes through (-20,-6) with slope m=1/4
brilliants [131]
We start with the equation y-y1 =m (x-x1) because we have m the slope = 1/4 and a point on the line with the coordinates (x1=-20, y1=-6) so, 
 
y+6=1/4 ( x+20); 
y=(1/4)x + 20/4 -6; 

y= (1/4)x -1 and this is the equation in slope intercept form y=mx +b  where the lope m= 1/4 and b= -1 the y-intercept

Answer <span>y= (1/4)x -1 </span>
5 0
3 years ago
3р - 2р – 5<br> What’s the work for this factoring trinomial
bonufazy [111]
3p - 2p - 5
collect like terms

(3-2)p - 5
calculate

1p - 5
the coefficient of 1 doesnt have to be writtent

Answer: p - 5
5 0
3 years ago
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