<span><span> x = -3/2 = -1.500
</span><span> x = 4</span></span>
<span>7x+9=2(4x+2)
7x+9=8x+4
7x-8x=4-9
-x=-5
x=-5/-x
x=5
</span>
Find the ratio of 4/15 lb to 1/3 lb:
4
--
15
-------
1
--
3
Invert the divisor (1/3) and multiply:
4 3
-- * ---- = 4:5 (this is the desired ratio)
15 1
Answer:
The difference between the area of the original triangle and the area of the new triangle is
.
Step-by-step explanation:
The equation for the area of a triangle (
) is:

Where:
- Base, dimensionless.
- Height, dimensionless.
The expression for each triangle are described below:
First Triangle (
,
)

Second Triangle (
,
)

The difference between the area of the original triangle and the area of the new triangle is:



The difference between the area of the original triangle and the area of the new triangle is
.
Answer:
One solution
Step-by-step explanation:
The given equation is;
0.75(x + 40) = 0.35(x + 20) + 0.35(x + 20)
Multiply through by 100
75(x + 40) = 35(x + 20) + 35(x + 20)
Combine the right hand side
75(x + 40) = 70(x + 20)
Expand the parenthesis
75x +3000 = 70x + 1400
Group similar terms;
75x -70x =1400-3000
5x=-1600
Divide both sides by 5
x=-320
There exist only one solution