Answer:
644ft^2
Step-by-step explanation:
Area of triangle=1/2bh
Area of square=l*l
so we have;
4 triangles with a base of 14ft and height of 16ft and 1 square with l=14ft
AreaTriangle=1/2(14ft)(16ft)=112ft*4=448ft^2
AreaSquare=14ft*14ft=196ft^2
Area Total=448ft+196ft=644ft^2
11) -x + y = -1 ; 2x - y = 0
y = -1 + x ; 2x - (-1+x) = 0 ⇒ 2x + 1 - x = 0 ⇒x = -1
y = -1 + (-1) ⇒ y = -2
12) -2x + y = -20 ; 2x + y = 48
y = -20 + 2x ; 2x + (-20 + 2x) = 48 ⇒ 2x -20 + 2x = 48 ⇒ 4x = 48 + 20
4x = 68 ⇒ x = 68/4 ⇒ x = 17
y = -20 + 2(17) ⇒ y = -20 + 34 ⇒ y = 14
13) 3x -y = -2 ; -2x + y = 3
y = 3 + 2x ; 3x - (3 + 2x) = -2 ⇒ 3x - 3 - 2x = -2 ⇒ x = -2 + 3 ⇒ x = 1
y = 3 + 2(1) ⇒ y = 3 + 2 ⇒ y = 5
14) x - y = 4 ; x - 2y = 10
x = 4 + y ; (4 + y) - 2y = 10 ⇒ 4 + y - 2y = 10 ⇒ 4 - y = 10
⇒ -y = 10 - 4 ⇒ -y = 6 ⇒ y = -6
x = 4 + (-6) ⇒ x = 4 - 6 ⇒ x = -2
15) x + 2y = 5 ; 3x + 2y = 17
x = 5 - 2y ; 3(5-2y) + 2y = 17 ⇒ 15 - 6y + 2y = 17 ⇒ -4y = 17 - 15
⇒ -4y = 2 ⇒ y = -2/4 ⇒ y = -1/2
x = 5 - 2(-1/2) ⇒ x = 5 + 2/2 ⇒ x = 5 + 1 ⇒ x = 6
Answer:
The rate is 140 miles per hour
Step-by-step explanation:
We can use the formula distance is equal to rate times time
The distance is 700 miles and the time is 5 hours
D =rt
700 = r*5
Divide each side by 5
700/5 = 5r/5
140 =r
The rate is 140 miles per hour
Answer: 27 feet per second
Step-by-step explanation:
A submarine dives 378 in 14 seconds.
So to find the number of feet a submarine dives per second, divide 378 by 14.
So your answer is 27 feet per second.
Answer:
Teorema de Pitágoras
Step-by-step explanation:
Answer is 9.
