Answer: 15 ft
Step-by-step explanation: shadow / height
8.4/6=1.4
21/1.4=15
Ok this might be wrong but you don’t have much time so I will give my best
I’m pretty sure the of the x and y thing you do this you see the box with the number in it do this the top two says 2 and 4 the left side is x and the right side is y so you see at the bottom of the number Line thing on the right is a little x that where you start so the box of numbers the fist one says 2 so go to the bottom number line and there is the number two now the top right box with numbers says 4 so go up 4 squares from the number 2 and make a dot where they come together
Answer:
Step-by-step explanation:
x^2 + 4x = 15.....take half of ur x term, then square it, then add to both sides
x^2 + 4x + 4 = 15 + 4
(x + 2)^2 = 19
sqrt (x + 2)^2 = sqrt 19
x + 2 = sqrt 19
x = -2 (+ - ) sqrt 19
so x = -2 + sqrt 19 or x = -2 - sqrt 19
Idk the answer sorry about that I am going to leave now
