David has a rectangle and a right triangle. -The length of the rectangle is 5 more than its width, w.
-The length of the shorter leg of the triangle is equal to the rectangle's width.
-The length of the longer leg of the triangle is twice the length of the rectangle.

Which function f(w), represents the combined area of the rectangle and the triangle?
A) f(w)=2w^2+10w
B) f(w)=3w^2+15w
C) f(w)= w^2+10w+25
D) f(w)= w^2+15w+50

b

step-by-step explanation:

given

- 2 (3x + 12y - 5 - 17x - 16y + 4 )

simplify the parenthesis by collecting like terms

= - 2 (- 14x - 4y - 1) ← distribute the parenthesis by - 2

= 28x + 8y + 2 → b

the answers c

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation:

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: