a rhombus has sides (2y+3) cm and (9—y) cm. find y and, from this, the perimeter of the
rhombus.

y=2

perimeter=28

Step-by-step explanation:

a rhombus has all 4 sides equal

because of this, we can set 2y+3 equal to 9-y.

2y+3 = 9-y

+y          +y

3y+3=9

-3      -3

3y=6

/2  /2

y=2

now we can plug y into the sides. we only need to do it once because all sides are equal.

2(2)+3

4+3

7

one side is 7. we must find all sides.

7+7+7+7 = 28

the perimeter is 28.

answer: the value of x is 7cm

step-by-step explanation:

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w