Answer:
Step-by-step explanation:
let : x The length and y the width you have this system :
xy =60....(1)
x = y+10...(2)
put the value for x in (1): (y+10)y =60
the quadratic equation is : y² +10y - 60 = 0
Δ =b² - 4ac a = 1 b= 10 c= - 60
Δ =10² - 4(1)(-60) = 324 =18²
y 1 = (-10-18)/2 negatif...... refused
y 2 = (-10+18)/2 =4
the width is 4
Answer:
1134.1 [cm²]
Step-by-step explanation:
A=πr2
Circle area = π * r² = π * 361 [cm²] ≈ 1134.1 [cm²]
π ≈ 3.14159265 ≈ 3.14
d = r * 2 = 19 [cm] * 2 = 38 [cm]
Answer:
16 in
Step-by-step explanation:
Because you multiply 4in by 3in and you get 12 in. and you subtract 3in by 1in to get the height for the smaller box and you get 2in so multiply 2in by 2in to get 4in and add your products to 12in and 4 in to get 16 in!
Hope this helps!
I hope this helps you
2.5. (k+1)=94-4
10. (k+1)=90
k+1=9
k=8
