When 1 is added to another 1 they join together to form a 2. Bruh idk what 1+1 long method is. But I hope it helped.
Answer:
10 weeks
Step-by-step explanation:
350 - 128.85 = 221.15
221.15/ 22.25= 9.9
So 10 weeks
6.75+5.95=12.7
17.40-12.7=5
5÷2= 2.5
Each cost 2.5
Answer:
Boat speed 9.66 mph
Step-by-step explanation:
Boat speed x mph
current speed 4 mph
against current x- 4 mph
with current x+ 4 mph
Distance= 8 miles
Time against + time with =2 hours
t=d/r
8/(x+4) +8/(x-4)= 2
LCD =(x-4)(x+4)
8*(x-4) +8(x+4) =2(x^2-16)
8x-32+8x+32=2(x ^2-16)
16 x = 2 x ^2 -32
2 x ^2 - -16 x - 32 =0
divide by 2
x^2-8x-16=0
Find the roots of the equation by quadratic formula
a= 1 , b= -8 , c= -16
b^2-4ac= 64 + 64
b^2-4ac= 128
%09sqrt%28%09128%09%29=%0911.31%09
x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29
x1=( 8 + 11.31 )/ 2
x1= 9.66
x2=%28-b-sqrt%28b%5E2-4ac%29%29%2F%282a%29
x2=( 8 -11.31 ) / 2
x2= -1.66
Ignore negative value
