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strojnjashka [21]
2 years ago
15

Solve 2x+y=-1 and -x+y=-7 in substitution method​

Mathematics
1 answer:
lesantik [10]2 years ago
3 0

Answer:x=2 y=-5

Step-by-step explanation

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This question is kind of confusing to me. Can I get some help?
swat32

Answer:

b. \frac{1}{3}

Step-by-step explanation:

The scale factor is the number by which one must multiply all sides in a triangle such that its sides are the same as another triangle. This only works in similar triangles (triangles where all of the angles between them are congruent or have the same measures).

8 0
2 years ago
Jkl is an equilateral triangle jk= 13x+5,KL= 17X-19 AND JL= 8X+35​
stira [4]

Answer:

x = 6

Step-by-step explanation:

Since the triangle is equilateral then sides are congruent.

Equate any 2 sides and solve for x

13x + 5 = 8x + 35 ( subtract 8x from both sides )

5x + 5 = 35 ( subtract 5 from both sides )

5x = 30 ( divide both sides by 5 )

x = 6

JK = (13 × 6) + 5 = 78 + 5 = 83

KL = (17 × 6) - 19 = 102 - 19 = 83

JL = (8 × 6) + 35 = 48 + 35 = 83

ΔJKL is equilateral with side = 83

4 0
3 years ago
Pls pls pls help <br>Find the perimeter and the area​
Illusion [34]

Answer:

Perimeter = 42 units Area = 57.73 square units

Step-by-step explanation:

Perimeter of an Astroid = 6l ---> 6 x 7 = 42 units

Area of an Astroid = (3 x pi x a^2)/8 = 57.73 square units

3 0
3 years ago
What is the vertex of the parabola<br> 1. (-1,0)<br> 2. (0,-3)<br> 3. (1,-4)<br> 4. (3,0)
larisa [96]
The answer is (1,-4)
Remember that the vertex is the center of the parabola.
3 0
3 years ago
Help with my math READ IT CARFULLY
Irina-Kira [14]

Sci = π . 2 . 2 = 12,56 ⇒ 1/2 Sc1 = 1/2 . 12,56 = 6,28

Srec = 6 . 4 = 24

S= 6,28 + 24 = 30,28

the answer is 30,28

ok done. Thank to me :>

8 0
2 years ago
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