Answer:
9 = -2/-1 +b
9 = 2 + b
b = 9-2
b = 7
Step-by-step explanation:
Answer:
x = 1
Step-by-step explanation:
29x + 2 = 31
-2 -2
29x = 29
----- -----
29 29
x = 1
we just need add x next to ratio and sum them all to get perimeter
9 + x + 2x + 4x = 65
7x = 56
x = 8
well since 8(x)<9<16(2x)<(32(4x), then
the shortest side is 8
Answer:
(a) 62.5 N
(b) 694.4 N/m
(c) 41.7 N
Step-by-step explanation:
Work done in stretching a spring is
since 
F is the applied force, E is the elongation and k is the spring constant.
(a) Here, e = 16 cm = 0.16 m
(b) Here, e = 12 cm = 0.12 m
(c) The restoring force is the same as the applied force.
Answer: 26 and 39
Step-by-step explanation:
Let the numbers be x and y . Also , let us take x as the larger number.
From the first statement :
x + y = 65 ...................... equation 1
From the second statement :
x - y = 13 ....................... equation 2
Solving the system of linear equation by elimination method. Let us eliminate y first , then we need to add the two equations to eliminate y , the equation then becomes
2x = 78
x =39
substitute x = 39 into equation 1 , that is
39 + y = 65
y = 65 - 39
y = 26
Therefore , the numbers are 26 and 39
