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erastovalidia [21]
3 years ago
9

X+3y=2 and y=2x+3 Please explain using substitution method.

Mathematics
1 answer:
kotegsom [21]3 years ago
5 0

- X + 3Y = 2  (*)

⇔X = 2 - 3Y  (1)

- Y = 2X + 3   (2)

(1),(2)⇒ Y = 2(2 - 3Y) +3

       ⇔ Y = 4 - 6Y + 3

       ⇔ Y = 1  (**)

(*),(**)⇒ X + 3×1 =2

       ⇔ X = -1

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Elisa bought 5 bracelets for a total of $25.95. If the bracelets were the same cost, about how much did each bracelet cost?
Lady bird [3.3K]

Answer:

Step-by-step explanation:

To find out what each bracelet costed, you have to divide the total amount spent by how many bracelets were purchased.

25.95 ÷ 5 = 5.19

In conclusion, each bracelet cost $5.19. :)

4 0
3 years ago
The figure is made up of 2 rectangles and 2 right triangles. What is the area of the figure? 173 units2 253 units2 277 units2 32
zubka84 [21]
Here, Area of a Triangle = 1/2 * b * h
A = 1/2 * 6 * 8
A = 1/2 * 48
A = 24

Area of two traingles = 2(24) = 48

Now, Area of a rectangle = 25 * 5 = 125

Now, Total area of the figure = 125 + 48 = 173 units2

In short, Your Answer would be Option A

Hope this helps!
8 0
3 years ago
Read 2 more answers
At right angles.)<br> 4 m<br> 4 m<br> 2 m<br> 2 m<br> 7 m<br> 2<br> 3 m<br> 7 m<br> 11 m
Arisa [49]

Answer:

71

Step-by-step explanation:

Area of fig 1 = 1 x b = 7 x 4 = 28

Area of fig 2 = l x b = (7-2) x 3 = 5 x 3 = 15

Area of fig 1 = 1 x b = 7 x 4 = 28 (same as ig 1)

Area of whole fig = fig 1 + fig 2 + fig 3 = 28+15+28 = 71

I hope im right !!

6 0
3 years ago
Read 2 more answers
Given that ABCD is a rhombus, what is the value of x?<br>(3x - 26)​
ExtremeBDS [4]
<h2>The required "option B) 20.75\°" is correct.</h2>

Step-by-step explanation:

You can refer figure:

brainly.com/question/4386376

To find, the value of x = ?

We know that,

Consecutive angles are supplementary

The diagonals bisect the angles.

2x\°+2(3x+7)\°=180\°

Divided by 2 both sides, we get

⇒ x\°+(3x+7)\°=90\°

⇒ x\°+3x+7\°=90\°

⇒ 4x=90\°-7\°

⇒ 4x = 83\°

⇒ x=\dfrac{83\°}{4}

⇒ x=20.75\°

∴ The value of x =20.75\°

Thus, the required "option B) 20.75\°" is correct.

7 0
3 years ago
Read 2 more answers
B. If 3x - 3 and 5x + 7° are the angle of a linear pair, find their measurement the angle<br>​
ankoles [38]

Answer:

x = 22°

the angles are: 63° and 117°

Step-by-step explanation:

a linear pair of angles total together to be 180°

so:

3x - 3 + 5x + 7 = 180

combune like terms:

8x = 176

divide both sides of the equation by 8:

x = 22°

the angles are: 63° and 117°

7 0
3 years ago
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