X: the unit digit
y: the tens digit
The unit digit is twice the tens digit so:
x=2y
The two digit number:
10y+x
The two digit number doubled:
2(10y+x)
The reversed number:
10x+y
So:
2(10y+x)=10x+y+12
substitute x for 2y
2(10y+2y)=10(2y)+y+12
24y=21y + 12
3y=12
y=4
x=2y=2*4=8
So the number is 48.
Answer:
<u>=-26.7</u>
Step-by-step explanation:
=-13.9+(-12.8)
=-13.9-12.8
<u>=-26.7</u>
Solution:
<u>Note that:</u>
- Robert + b = Jack
- Robert = 99 buttons
<u>Substituting the values into the equation:</u>
- Robert + b = Jack
- => 99 + b = Jack
This means that Jack has 99 + b buttons.
Systems of linear equations can only have 0, 1, or an infinite number of solutions. The two lines can't intersect twice, so the correct answer is that the system has one solution.
Answer:
6
Step-by-step explanation:
Greatest common factor (GCF) of 42 and 60 is 6.
As the numbers get larger, or you want to compare multiple numbers at the same time to find the GCF, you can see how listing out all of the factors would become too much. To fix this, you can use prime factors.
List out all of the prime factors for each number:
Prime Factors for 42: 2, 3, and 7
Prime Factors for 60: 2, 2, 3, and 5
Now that we have the list of prime factors, we need to find any which are common for each number.
Looking at the occurences of common prime factors in 42 and 60 we can see that the commonly occuring prime factors are 2 and 3.
To calculate the prime factor, we multiply these numbers together:
GCF = 2 x 3 = 6
(hope this helps can i plz have brainlist :D hehe)