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EleoNora [17]
4 years ago
10

4x+6y=-20, -4x-5y=10

Mathematics
1 answer:
Lyrx [107]4 years ago
8 0
X= 10 and y= -10 (mathpapa.com)
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2 x 15 3 / 3 =<br><br> <img src="https://tex.z-dn.net/?f=2x15%2F3%3D" id="TexFormula1" title="2x15/3=" alt="2x15/3=" align="absm
kykrilka [37]

Answer:

32

Step-by-step explanation:

8 0
3 years ago
Select the expression that has a value of 13.
yuradex [85]

Answer:

9 − (3 x 2) ÷ 3 + 6 is the answer

8 0
3 years ago
The sides of a rectangle have the ratio 7:2. its perimeter is 207cm.<br> Find the area
castortr0y [4]
X - unit of length
w,l - the sides of a rectangle

7 : 2 ⇒ 7x : 2x

Perimeter: P = 207cm
Perimeter: P = 2w + 2l

therefore: 2w + 2l = 207    |divide both sides by 2

w + l = 103.5 (cm)

w : l = 7 : 2 ⇒ w : l = 7x : 2x ⇒ w = 7x; l = 2x

subtitute

7x + 2x = 103.5
9x = 103.5    |divide both sides by 9
x = 11.5 (cm)

7x = 7 · 11.5cm = 80.5cm
2x = 2 · 11.5cm = 23cm

w = 80.5cm; l = 23cm

Area = wl

Area: A = 80.5cm · 23cm = 1851.5cm²
8 0
4 years ago
Now i have a second question for brainlest
babunello [35]

Answer:

3 Pounds for 15.10

Step-by-step explanation:

find a common multiplier (12)

4 pounds ($21.50) [×3] 12 pounds ($64.50)

3 pounds ($15.50) [×4] 12 pounds ($ 62)

you save $2.50

4 0
3 years ago
Read 2 more answers
Alex is setting up an in-line skating course 21 feet long to practice weaving around cones. He wants a cone every 3 1/2 feet. Ho
Sauron [17]

Answer:

I think it is 6 cones

Step-by-step explanation:

21 ÷ 3.5 = 6

3 0
3 years ago
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