Answer:
x = 8
Step-by-step explanation:
9(x - 4) = 2(x + 10)
9x - 36 = 2x + 20
7x = 56
x = 8
Please mark as brainliest :)
Answer:
5 hrs
Step-by-step explanation:
7 1/2 hours equates to 450 minutes total
2/3 of 450 = 300 total minutes
turning the minutes back into hours, 300 / 60 = <u>5</u>
Answer: 1 2 3
Step-by-step explanation:
Answer:
k=-8
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
Check the picture below.
now, we know that the slanted legs are congruent, since it's an isosceles trapezoid, we also know that the bases are the parallel sides, so, the "altitude" or distance from those bases are the same length, for each of those triangles in the picture.
now, the bases are parallel, that means the altitude segment is perpendicular to the base, the longest side at the bottom, so, we end up with a right-triangle that has a Hypotenuse and a Leg, equal to the other triangle's.
thus, by the HL theorem for right triangles, both of those triangles are congruent, and if the triangles are congruent, all their sides are also, including the ones on the base.