17. Difference between -11 and 17, which is 28.
18. -189 + 56 + 64 = -69, meaning she still owes 69 dollars.
19. -528 * 4 = -2112
20. -6,660 divided by 37 = -180
Meaning it falls 180 meters down every minute.
A = l x w
so you know that the length is 3m longer than the width, so you could use a formula to represent that
w = l + 3
you then substitute the second equation into the first to solve for l
70 = l x (l +3)
70 = l^2 + 3l
you could then rearrange the formula and solve for l using the quadratic formula
0 = l^2 + 3l - 70
l = -3 +- (square root (3)^2 - 4(1)(70)) / 2(1)
l = -3 +- (square root 9 + 280) / 2
l = -3 +- (square root 289) / 2
l = -3 +- 17 / 2
then you solve for the two seperate roots
l = -3 + 17 /2
l = 14 / 2
l = 7
or
l = -3 - 17 / 2
l = -20 / 2
l = -10
since a length cannot be negative, this root is not viable. therefore l = 7
to solve for w you would use
w = l + 3
w = 7 + 3
w = 10
hope this helps! if you did not understand a step or concept please let me know!
Answer:
x/7
Step-by-step explanation:
cos 39= adjacent/hypotenuse
=x/7
P^2+13p-30
(P+15)(p-2)
Set each =0 and solve for p
P: -15,2