Pplz help

B. 12 square feet

Step-by-step explanation:

Each triangle has a base of 4 ft and a height of 3 ft. The areas of the triangles are equal.

A = 2bh/2 = bh = 4 ft * 3 ft = 12 square feet

B. 12 square feet

12 square feet.

Step-by-step explanation:

The formula for the area of a triangle is A =

So if you multiply 3 by 4 you get 12 then divide it by 2, which equals 6. Then you do the same with the second triangle, (3*4)/2 = 6. Now if you add the two areas you get 12 square feet.

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

45.36 feet per second

step-by-step explanation:

tyrone travels 30 miles in 58.2 minutes.  

1 mile = 5280 feet; this means he travels

30(5280) = 158400 feet in 58.2 minutes.

1 minute = 60 seconds; this means he travels 158400 feet in

58.2(60) = 3492 seconds.

this gives us the unit rate of

158400/3492 = 45.36 feet per second.