What is the surface area of a pyramid with the height of seven millimeters and the base sides are 10 millimeters

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

x = 23.78

step-by-step explanation:

49%

step-by-step explanation:

when you realize that you dont know just realize i just took a test and im so smart

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)