Answer:
The number = 45
Step-by-step explanation:
Let the 10s digit = x
Let the units digit = y
10*x + y = 5(x + y) Start here: remove the brackets
10*x + y + 9 = 10y + x Subtract y and 10x from both sides
Using the first equation
10x + y = 5x + 5y
5x + y - 5y = 0
5x - 4y = 0
5x = 4y
y = 5/4x
From the second equation
9 = 9y - 9x
1 = y - x Substitute y = 5/4 x
1 = 5/4x - x
1 = 1/4 x
x = 4
y = 5/4 * 4
y = 5.
Answer:
- <u>Domain</u> : -1 ≤ x ≤ 3
- <u>Range</u> : 6 ≤ y ≤ 27
Step-by-step explanation:
The domain is the set of possible x-values.
The range is the set of possible y-values.
<u>Domain</u> : -1 ≤ x ≤ 3
<u>Range</u> : 6 ≤ y ≤ 27
Answer:
x=7
Step-by-step explanation:
x*48should be equal to 42*8
-2(-1)(6)
2(6)
12
The answer is C, 12.
