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V125BC [204]
3 years ago
13

Branilest and 30 point please answer

Mathematics
1 answer:
Lynna [10]3 years ago
7 0

Answer:

<em>Addition Property of Equality</em>

Step-by-step explanation:

<u>System of Equations</u>

When two equations are given and two variables are unknown in both equations, then we can solve the system in several ways.

One method consists in adding both equations term by term and eliminate one of the variables. That property is called the addition of equalities. Let's consider the equations given in the problem:

5x+4y=-2\\2x-4y=6

If we add both equations, we have

5x+4y+2x-4y=-2+6

Simplifying

7x=4

By adding both equations we managed to eliminate the variable y and could easily find the value of x

x=4/7

Answer: Addition Property of Equality

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Yes it was reasonable. I say it is resonable because if you multiply 44 times 25 it is 1,100 so the estimate was close enough
8 0
3 years ago
There are 320 rods in a mile Find the length of a rod in feet
faust18 [17]
The answer should be 320 rods = 1 mile 5280 ft= 1 mile
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3 0
3 years ago
The length of a rectangle is 5 less than 3 times its width. The perimeter is
My name is Ann [436]

Answer:

The length is 28 and the width is 11

Step-by-step explanation:

To solve this problem, we can make the width as x.

Since the length is 5 less than 3 times the width, it's going to be 3x - 5

So now we've got the length and width, just need to find the perimeter, which is all the sides added up together. They already gave us the perimeter, so we just have to solve the equation:

2(3x - 5) + 2x = 78

6x - 10 + 2x = 78

8x - 10 = 78

8x = 88

x = 11

x = 11, but remember, x is the width, not the length. Since we already found what x is, we just have to plug it into the equation of:

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Answer: Length = 28 (don't forget to add the unit if there is one)

8 0
2 years ago
Is anyone able to solve this?
Olenka [21]

Explanation:

To find x we need to find the unknown side that connects the two triangles using the Pythagorean theorem:

a² + b² = c² (c is always hypotenuse)

So:

a² + 6² = 9²

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a² = 81 - 36

a² = 45

a = sqrt45

Now we do the same thing for the other triangle:

x² + 5² = sqrt45²

x² + 25 = 45

x² = 20

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4 0
1 year ago
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zaharov [31]

Answer:

Step-by-step explanation:

do the proportion ...

1 inch/ 80 miles =x inch/ 1100 miles

1100= 80x

x=1100/80=13.75

The trip would be about 13.75 inches on the map

hope this will help u

3 0
3 years ago
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