OK i have to go rn but u can add me on discord and i will answer it later
my tag: jingchusu#0001
Answer:
10.4 meters
Step-by-step explanation:
3² + 10² = c²
9 + 100 = c²
c² = 109
c = √109 ≈ 10.4
Answer:
I think that the answer is A.
Step-by-step explanation:
Answer: 13 feet
Step-by-step explanation: You are given that the perimeter, P, of the rectangle is 42 meters (i.e., P = 42). Also, the length, L, of the rectangle is 3 meters less than 2 times the width, W (i.e., L = 2W - 3).
Recall that the perimeter, P, of a rectangle is given by the following formula:
P = 2W + 2L
Substituting 2W - 3 for L, we arrive at the following:
P = 2W + 2(2W - 3)
P = 2W + 2·2W + 2·-3
P = 2W + 4W - 6
P = 6W - 6
Since we were given that P = 42, then
42 = 6W - 6
42 + 6 = 6W - 6 + 6
48 = 6W
48/6 = 6W/6
8 = W
Therefore, the width of the rectangle is 8 meters. Use this value to solve for the length:
L = 2W - 3
L = 2·8 - 3
L = 16 - 3
L = 13
Answer:
+3.464; -3.464
Step-by-step explanation:
call A = y + 2x + 1 = 0 => y = (1 - 2x)
call B: 4y - 4(x^2) - 12x = -7
=> replace y from A to B =>
- 4(1 - 2x) - 4(x^2) - 12x = -7
- 4 - 8x - 4(x ^ 2) - 12x = -7
- -8x - 4(x ^ 2) - 12x = -7 - 4 = -11
- -4(x^2) - (8x - 12x) = -11
- -4(x^2) + 4x = -11
- -4(x^2) + 4x + 11 = 0
=> get delta Δ = (-4^2) - 4*(-4 * 11) = 192
=> Δ > 0 => got 2 No
=> x1 = 
= 
= -1.232
=> x2 = 
=
= 2.232
=> replace x from B into A
=> y1 = (1 - 2x) = (1 - 2 * -1.232) = 3.464
=> y2 = (1 - 2x) = (1 - 2 * 2.232) = - 3.464
