Answer:
3 79/100
Step-by-step explanation:
Answer:
Step-by-step explanation:
The bottom leg is divided into equal segments, one of them is b.
It means the bottom leg is b + b = 2b.
<u>According to Pythagorean:</u>
<u>Solve for b:</u>
- 1681 = 4b² + 81
- 4b² = 1681 - 81
- 4b² = 1600
- b² = 400
- b = √400
- b = 20 cm
Answer:
X=-14.5 Y=3.2
Step-by-step explanation:
5x-13=5y+7x
subtract 7x from both sides
-2x-13=5y
subtract 5y from both sides
-2x-5y-13=0
add 13 to both sides
-2x-5y=13
<u>SYSTEMS OF EQUATIONS NOW</u>
4x+15y=-10
-2x-5y=13
multiply the second equation by 3
4x+15y=-10
-6x-15y=39
add the equations together to get:
-2x=29
divide both by -2
x=-14.5
Substitute x into one equation
4(-14.5)+15y=-10
-58+15y=-10
add 58 to both sides
15y=48
divide both sides by 15
y=3.2
<em>CHECK YOUR WORK</em>
4(-14.5)+15(3.2)=-10
-58+48=-10
-10=-10
-- To change a percent into a decimal, move
the decimal point two places this way <== .
33.3% = 0.333 .
-- To change a percent into a fraction, remember
that the symbol ' % ' means ' /100 ' .
33.3 % = 33.3/100 .
That fraction looks ugly, because it has a decimal in the numerator.
That's easy to fix. Multiply top and bottom by 10, and you have
333/1000 .
