Please help me fast and show all your work please thx

area = 50 cm²

Step-by-step explanation:

The area (A) of a trapezoid is calculated as

A = h (a + b)

where h is the perpendicular height and a, b the parallel bases

Here h = 4, a = 15 and b = 10, thus

A = × 4 × (15 + 10) = 2 × 25 = 50 cm²

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

step-by-step explanation:

for the free