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Anne picks a 4-digit number. The first digit is not zero. The 4-digit number is a multiple of 5. How many different 4-digit numbers could she pick?

We know that a digit can be a number between 0 and 9. In this case, the first digit can't be 0, so it has to be a number between 1 and 9. So, we have 9 possible choices for the first digit (1,2,3,4,5,6,7,8,9...
XD
Answered by XENI D. • Maths tutor
11519 Views

Explain how a fall in interest rates can affect total spending in the economy.

A fall in interest rates would mean it would be cheaper for consumers to borrow hence increasing the likelihood of consumers borrowing hence consumer spending would increase. Also, a fall in interest rates w...
SJ
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Solve the simultaneous equations: 2x + 3y = 5 and 3x + 4y = 12

2x + 3y = 52. 3x + 4y = 12 Firstly, you want to have the same amount of x variables, or y variables. To get the same x, we multiply 1. by 3, and multiply 2. by 2, giving us: 3. 6x + 9y = 154. 6x + 8y = 24 No...
QO
Answered by Quincy O. • Maths tutor
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How do I make x the subject of the formula?

5x+11=(y+2)/2 Best way to think about this is like its a normal equation where you're trying to find the value of x, just break it down into simple steps. The best thing to do first is to get rid of any frac...
IO
Answered by Isabelle O. • Maths tutor
12934 Views

The first floor of an ancient japanese tower has 150 steps. Each floor above has 5 fewer floors than the previous. So, the second floor has 145 steps, the third 140 etc. How many floors does the tower have if the final floor has 30 steps leading to it.

Note this is an arithmetic series problem, so we use the equation: x n = a + d(n-1). Number of steps on the first floor is 'a', i.e. a = 150. Difference in the number of steps on each subsequent floor is -5 ...
JF
Answered by Joel F. • Maths tutor
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