28.964 and 1.036
To make 30, you can add various pairs of numbers together. For example, adding 10 to 20 will give you 30, or adding 15 to 15 will also result in 30. Essentially, any two numbers that sum to 30 can be used, such as 0 and 30, or 25 and 5.
The factor pairs of 30 are (30,1)(15,2)(10,3)(6,5) None of them add up to 20.
The two numbers that multiply to -30 and add up to 13 are 15 and -2. When you multiply 15 and -2, you get -30, and when you add them together, you get 13.
It is impossible for three prime numbers less than 30 to add up to 1955. After all, 30+30+30 is only 90.
The two numbers that multiply to 810 and add to -63 are -27 and -30. This is because -27 × -30 = 810 and -27 + -30 = -57.
To make 30, you can add various pairs of numbers together. For example, adding 10 to 20 will give you 30, or adding 15 to 15 will also result in 30. Essentially, any two numbers that sum to 30 can be used, such as 0 and 30, or 25 and 5.
13 & 17
No two prime numbers can make 30.No two prime numbers can make 30.No two prime numbers can make 30.No two prime numbers can make 30.
35
The factor pairs of 30 are (30,1)(15,2)(10,3)(6,5) None of them add up to 20.
The two numbers that multiply to -30 and add up to 13 are 15 and -2. When you multiply 15 and -2, you get -30, and when you add them together, you get 13.
30
It is impossible for three prime numbers less than 30 to add up to 1955. After all, 30+30+30 is only 90.
The two numbers that multiply to 810 and add to -63 are -27 and -30. This is because -27 × -30 = 810 and -27 + -30 = -57.
-117
They are 29, 30 and 31.
61