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Describe and explain three adaptations of succulent plants that allow them to live in hot and dry conditions.

There are many to choose from here but we'll take the two most important. Many succulents such as cacti have needles instead of leaves. This reduces the amount of water lost via transpiration meaning that th...
HP
Answered by Henry P. • Maths tutor
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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
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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
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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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