3 years ago

X+y=5 x-1=y Please help

1 answer:

4 0

This is a simultaneous equation

Rearrange the second to give

x - y = 1

Add the two equations

(x + y) + (x - y) = 5 + 1

2x = 6
x=3

Substitute 3 into either equation

3 - 1 = y

y = 2

You might be interested in

Please help me on this I’m so tired and I can’t sleep until my progress is at 80 and this is the end of my year it’s at 79%

Elena L [17]

Answer:

The answer is the bottom left

4 0

4 years ago

What is the width of the rectangle shown below? <br>4x + 3 <br>A = 8x2 – 10x – 12

ozzi

Answer:

Step-by-step explanation:

Area of a rectangle = Length * Width

Given parameters

Area A = 8x2 – 10x – 12

Length of the rectangle = 4x+3

Required

Width of the rectangle.

Substituting the given parameters into the formula

8x2 – 10x – 12 = (4x+3)*width

width = 8x2 – 10x – 12 /4x+3

Factorizing the numerator

8x² – 10x – 12

= 2(4x²-5x-6)

= 2(4x²-8x+3x-6)

= 2(4x(x-2)+3(x-2))

= 2(4x+3)(x-2)

Width = 2(4x+3)(x-2)/4x+3

Width = 2(x-2)

Width = 2x-4

<em>Hence the width of the rectangle is 2x-4</em>

8 0

3 years ago

The questions are in the picture<br> (I’LL GIVE BRAINLEST) <br> PLEASEEEEEEEEEEE HELPPPPPPP

PIT_PIT [208]

Answer:

i think part A

1)3:2

2)3:4

8 0

3 years ago

1 point

WARRIOR [948]

59 is an outlier it's not in the 70s

8 0

3 years ago

The total surface area of a cone whose radius is 2 r and slant height 2l is

vampirchik [111]

Answer:

$A=4\pi r(l+r)$

Step-by-step explanation:

The total surface area of a cone is given by :

$A=\pi rl+\pi r^2\\\\=\pi r(l+r)$

Put r = 2r and l = 2l in the above formula

$A=\pi \times 2r(2l+2r)\\\\A=2\pi r(2l+2r)\\\\=2\pi r \times 2(l+r)\\\\=4\pi r(l+r)$

Hence, the total surface area of the cone is $4\pi r(l+r)$ .

7 0

3 years ago