What is the price of the computer without the discount? To solve this you need to know how much the computer costs and then take 20% off of it.
Use the distributive property to express<span> a </span>sum<span> of two </span>whole numbers<span> 15 and 30 with a </span>common factor<span> as a </span>multiple of a sum<span> of two </span>whole numbers with no common factor<span>.
</span><span>(15 + 30)
= 15(1+2)</span>
Answer:
45
Step-by-step explanation:
A number consists of 2 digits whose sum is 9 => x + y = 9
If the order of the numbers is inverted, the result is equal to the given number plus 9 units => (10*y + x) + 9 = (10*x + y)
Thus:
x + y = 9 => multiply by -9 => 9*y + 9*x = 81
10*y + x + 9 = 10*x + y => 9*y - 9*x = -9
We are left then that:
9*y + 9*x = 81 (1)
9*y - 9*x = -9 (2)
we add both equations
18y = 72
y = 72/18 = 4
replacing
x + y = 9
x + 4 = 9
x = 5
Therefore the number is (10y + x) => (10 * 4 + 5) => 45
Answer:
75cm
Step-by-step explanation:
Answer:
Step-by-step explanation:
Answer:
9
Step-by-step explanation:
Because 63 is a multiple of 7
So.... 63/7
=9
So this shows us 9 is the mean
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