Answer: 90 is a number which has 9 as the sum of its digits, 9+0=9 and if the digits are reversed, 09 is 81 less than 90.
Step-by-step explanation: Since the number must be a 2-digit number, it seems that 90 is the only number that qualifies.
If you need some equations, here is a way to set up a system to solve:
x+y= 9 rewrite to get a value for y to substitute:
y = 9-x
10x +y = 10y + x + 81 rewrite by moving (subtracting variable terms from both sides)
10x -x + y-10y = 81 combine like terms
9x - 9y = 81
Substitute for y and solve for x
9x - 9(9-x)= 81 distribute.
9x - 81 + 9x = 81
18x = 162. 162/18 = 9
x = 9
Substitute in the original equation to solve for y
9 + y = 9
y = 0
10(9) + 0 = 10(0) + 9 +81
90 - 81 = 09
Probably it's all wrong
4.5 = 10 %If is the same then 4.5*20+45=135
If not then
FV=P(1+r)n45* (1+0.1)20 = 45*6.727=302.737
Answer:
e
Step-by-step explanation:
because the lines are less scattered and they all are going straight up. they are also higher then all of the other ones.
First, let's find a common denominator to more easily compare the fractions.
12 will work just fine.
5/6 becomes 10/12, because 6x2=12, and 5x2=10
1/4 becomes 3/12, because 4x3=12, and 1x3=3
2/3 becomes 8/12, because 3x4=12, and 2x4=8
Now, we add them together, two at a time, to find the pieces that will make a length at least one yard, and closest to one yard.
10/12+3/12=13/12 This is 1/12 more than 1 yard.
10/12+8/12=18/12 This is 6/12 more than 1 yard.
8/12+3/12=11/12 This is 1/12 less than 1 yard.
The two pieces that will make a length of at least 1 yard, and are closest to 1 yard are the 5/6 (10/12) yard and 1/4 (3/12) yard pieces.
If Carl uses the two shortest pieces, the 1/4 (3/12) yard and 2/3 (8/12) yard pieces, he will need 1/12 more cable.
3/12+8/12=11/12
12/12-11/12=1/12
Answer:
The equation is 39=3r-6
Step-by-step explanation:
Let x = # of years from the start of the Great Depression to the first Presidential election of Nixon
Let r = Raul's age
The question gives us what x equals so...
x=39
Now we just turn the sentence into an equation.
"The number of years from the start of the Great Depression to the first Presidential election of Nixon [(x)] is six years less than three times Raul's age [(3r-6)]"
Remove the icky words...
x=3r-6
replace x with what it equals (39)
39=3r-6
Now you can go on to olve it
Overal Raul is only 15 :)
