Find the area of this rectangle in
i) cm2
ii) mm2
19mm
2.3cm

Step-by-step explanation:

i) Length = 2.3 cm

 Width = 19 mm = 19/10 = 1.9cm    {10mm = 1 cm}

Area of rectangle = length * width

= 2.3*1.9

= 4.37 cm²

ii) Length = 2.3 cm = 2.3*10 = 23 mm  

Width = 19mm

Area of rectangle = length * width

= 23 * 19

= 437 mm²

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

i'm sorry i don't know

step-by-step explanation: