Survey

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Maxwell's equations wikipedia, lookup

Itô diffusion wikipedia, lookup

Calculus of variations wikipedia, lookup

Derivation of the Navier–Stokes equations wikipedia, lookup

Euler equations (fluid dynamics) wikipedia, lookup

Equations of motion wikipedia, lookup

Equation of state wikipedia, lookup

Navier–Stokes equations wikipedia, lookup

Schwarzschild geodesics wikipedia, lookup

Differential equation wikipedia, lookup

Exact solutions in general relativity wikipedia, lookup

Partial differential equation wikipedia, lookup

Transcript
```1.1 SOLVING ONE STEP
EQUATIONS
WHAT WE WILL LEARN
• Solve linear equations using addition and
subtraction
• Solve linear equations using multiplication and
division
• Use linear equations to solve real-life problems
EX. 1 SOLVING BY
• Solve each
equation
• Do the opposite
• X – 3 = -5
• +3 +3
• X = -2
• .9 = y + 2.8
• -2.8
-2.8
• -1.9 = y
keep sign
• Different sign,
subtract and keep
sign of bigger
number
• Solve
• n + 3 = -7
•
-3 -3
• n = -10
• Solve
• -6.5 = p + 3.9
• -3.9
-3.9
• -10.4 = p
EX. 2 SOLVE BY MULTIPLY/DIVIDE
• Solve each equation
• 1.3z = 5.2
• Divide by 1.3
•
1.3𝑧
1.3
5.2
1.3
=
• z=4
• -
𝑛
5
= −3
• Multiply by -5
• Always want letter to
be positive
• −5
−
• n = 15
𝑛
5
= −3 −5
• When multiplying or
dividing two
negatives or two
will be positive
• When multiplying or
dividing a negative
and a positive, the
negative
• Solve
•
𝑦
3
• Solve
• .05w = 1.4
= −6
• 3
𝑦
3
• y = -18
= −6 3
•
.05𝑤
.05
=
• w = 28
1.4
.05
EXS. 3 AND 4 STORY PROBLEMS
• A discounted amusement park ticket costs \$12.95 less than the
original price p. You paid \$44. Write and solve an equation to
find the original price.
• Ticket = original – 12.95
• 44 = p – 12.95
• +12.95 +12.95
• 56.95 = p
• The temperature at 5 pm is 20 F. The temperature at 10 pm is 5 F. How many degrees did the temperature fall?
• t = 20 – (-5)
• t = 25
```
Related documents