The function f(x) = -0.3x(2) + 2.5x + 5 can be used to approximate the distance a thrown ball is from the ground, where x is
the distance between the ball and the person throwing the ball. the mathematical domain of the function is all real
numbers.
the reasonable domain of the function is when 0 less than or equal too x less than or equal too x but less than or equal to what value?

answer: 72: 111

step-by-step explanation:

y= 2x+7

changed to y= 5x +7

as slope is increased from 2 to 5

therefore it would be less steeper

so, option d) is correct

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

you have 6 equal triangles, find the area of one of them (b*h/2) and multiply by 6

(8*4: 2)*6 =

32 cm² is your answer