5 x 198=(5 x 200)-(5 x 2)=1000-10=990
Since 198=200-2, you can express the equation this way, and solve it easily in your head, instead of multiplying it out.
☺☺☺☺
It is a 1 in 9 chances
hope this helps
Answer:
1) Look at the equation. When looking at the problem equation, identify the base (b), exponent (y), and exponential expression (x).
Example: 5 = log4(1024)
b = 4
y = 5
x = 1024
2) Move the exponential expression to one side of the equation. Set the value of your exponential expression, x, to one side of the equal sign.
Example: 1024 = ?
3) Apply the exponent to the base. The value of your base, b, needs to be multiplied by itself by the amount of times indicated by your exponent, y.
Example: 4 * 4 * 4 * 4 * 4 = ?
This could also be written as: 45
4) Rewrite your final answer. You should be able to rewrite the logarithm as an exponential expression now. Verify that your answer is correct by making sure that both sides of the equation are equal.
Example: 45 = 1024
Plug in 2 for x, and -4 for y
2(2)² + 3(2)(-4) - (-4)²
2² = 4(2) = 8
3(2) = 6(-4) = -24
-4² = 16
8 - 24 - 16 = answer
Simplify.
answer = 8 - 40
answer = -32
-32 is your answer
hope this helps
Answer:
1.50
Step-by-step explanation:
6÷4=1.50, 1.50×4= 6.00
