Answer:
Step-by-step explanation:
x² + y² = 81
x + y = √81
x + y = 9
x ≥ 9
y ≤ 9
Answer:
30%
Step-by-step explanation:
total boxes of pizza = 20
he gave away 14 boxes
so pizza left is 20 - 14 = 6 boxes
to calculate percentage = 6 / 20 * 100
= 6 * 5
= 30%
x=12
x/16-1-4=1/2
multiply by both sides
x-4=8
move constant to the right side of and change its sign
x=8+4
add the numbers
x=12
How many numbers from 1 to 10 are not a multiple of 3? 1, 2, 4, 5, 7, 8, 10 means there are 7
So the probability is 7/10 = .7 = 70%
<span>General rule for adding numbers
Two integers with the same signs
=> Once 2 integers has the same sign, then add.
For example
5 + 3 = 8 ( 5 and 3 are both positive numbers)
-5 + (-3) = -8 (5 and 3 are both negative number, thus we added the 2 numbers)
Two integers with different signs
=> When 2 integers has different sign, then do subtraction
For example
-5 + 3 (5 and 3 has different signs)
- 5 + 3 = 2
Two integers that vary in sign
=> When 2 integers vary in sign, then it will depend on the operator
For example
5 + (-3) (5 and 3 has different signs, but the process will vary with the
operator and number sign)
When positive and negative = negative
5 – 3 = 2
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