3 years ago

Describe three different methods to solve x²- x - 56 =0

Mathematics

1 answer:

Vika [28.1K]3 years ago

5 0

Methods: 1) Factoring 2) Complete the square 3) Quadratic form

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9(5x + 1) ÷ 3y

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, 15x+3/y...............

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3 years ago

HELPP PLEASEE! pleaseeeeee

vfiekz [6]

Answer:

a = 14 km

Step-by-step explanation:

The area of a triangle is

A = 1/2 bh where b is the base and h is the height

112.7 = 1/2 ( a) 16.1

112.7 = 8.05a

Divide each side by 8.05

112.7/8.05 = a

14 =a

a = 14 km

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2 years ago

SOLVING SYSTEMS OF EQUATIONS BY SUBSTITUTION. 1. 2x+3y=1 -3x+y=15

ohaa [14]

$2x+3y=1 \\
-3x+y=15 \\ \\
\hbox{from the 2nd equation:} \\
-3x+y=15 \\
y=15+3x \\ \\
\hbox{substitute 15+3x for y in the 1st equation:} \\
2x+3(15+3x)=1 \\
2x+45+9x=1 \\
9x+2x=1-45 \\
11x=-44 \\
x=-4 \\ \\
\hbox{solve one of the equations for y}: \\
2x+3y=1 \\
2 \cdot (-4) + 3y=1 \\
-8+3y=1 \\
3y=1+8 \\
3y=9 \\
y=3 \\ \\
\hbox{the answer:} \\
x=-4 \\
y=3$