Answer:
Step-by-step explanation:
Let the number in question be 'n'. Then twice the sum of the number and 3 is written as:
2(n + 3)
Three times the difference of the number and 9 is written as:
3(n - 9)
The problem says these two are equal, so:
2(n + 3) = 3(n - 9)
2n + 6 = 3n - 27
Add 27 to both sides:
2n + 33 = 3n
Subtract 2n from both sides:
33 = n (the number is 33)
Answer:
Third option:
Explanation:
The third option states that...
The graph crosses the y axis at (0,-5), which is correct. (0,-5) is the y-intercept of this graph.
The graph decreased from x=-10 to x=-2, which is also true. We can see a decrease starting from when x=-10 that ends when x=-2.
The graph remained constant from x=-2 to x=-10, which is correct. We do not see an increase or decrease on this graph from when x=-2 to when x=10.
I hope this helps! Please comment if you have any questions.
Answer:
11
Step-by-step explanation:
First, write an equation to represent the situation.
34 = 2a + 12
This equation works because your combined age is half of 68, so 34. If your age is a, then yours sister's age is a + 12. if you add your age to your sister's, you get 2a + 12.
Now just solve for a.
34 = 2a + 12
First, subtract 12 from both sides.
22 = 2a
Then divide both sides by 2.
11 = a
So you are 11 years old. If you need to check your work, your age (11) plus your sister's age (11 + 12, which is 23) is 34, which is half of your grandfather's age.
Answer:
its a angle
Step-by-step explanation:
