A + b = 15 ..... eq 1
a – b = 12 ...... eq 2

So a = 15 – b
Substitute in eq 2 :

15 – b – b = 12
15 – 2b = 12
–2b = 12 – 15
b = 1.5

So a = 15 – 3/2 = 13.5

4ab = 4 x 13.5 x 1.5 = 81

4 0

3 years ago

Read 2 more answers

Find the area of the triangle. Enter your answer in the box. An obtuse triangle. The base of the triangle is fourteen millimeter

Jet001 [13]

Answer:

Step-by-step explanation: Formula to find an area of a triangle A= 1/2base x height

Data

h=12mm A=1/2 base x height

b=14mm. A= 1/2 x (14mm x 12mm)

A=? A= 168mm^2(square) /2

A= 84mm square

4 0

3 years ago

-2x + |4n - 2| x = -3 n = 2

Tresset [83]

Answer:

Step-by-step explanation:

4 0

3 years ago

If we list all the possible factors (in order) of 12, we get 1, 2, 3, 4, 6, 12. This is the case because 1 x 12, 2 x 6, and 3 x

soldi70 [24.7K]

Answer:

1, 2, 3, 5, 6, 10, 15 and 30.

3 0

3 years ago