answer: you would just substitute all of the values you see for b into the equation where there's a b
Answer:
9.06 × 10
Step-by-step explanation:
7n^2 + 5 = 453
Subtract 5 from both sides:
7n^2 = 448
Divide both sides by 7:
N^2 = 64
Take the square root of both sides:
N = 8
Answer:
41 or 47
Explanation:
First, list all the prime numbers from 40 to 60.
They are 41, 43, 47, 53 and 59.
It says the difference between each digit is 3, so we have to subtract the smaller digit from the larger digit in our list of prime numbers above.
4-1=3
4-3=1
7-4=3
5-3=2
9-5=4
Both 41 and 47 have a difference of 3 between their digits. So your answer is 41 or 47.
Hope this helped you!
Let's guess and check.
Let's try 8
2 × 8 = 16
3 × 8 = 24
4 × 8 = 32
16 + 24 + 32 = 72 ==> too high
Let's try 6,
2 × 6 = 12
3 × 6 = 18
4 × 6 = 24
12 + 18 + 24 = 54 ==> perfect
Wow, I did not think I'd get that on the 2nd try.
So the numbers are 12, 18, and 24.
