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Work out the number of green pens in the box. (rest of Q below)

There are only green pens and blue pens in a box. There are three more blue pens than green pens in the box. There are more than 12 pens in the box. Simon is going to take at random two pens from the box. Th...
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Answered by Elinor H. • Maths tutor
5411 Views

If a=4, b=-2.5, c=10, and d=-6, then calculate 1)abc 2) 4(a^2)-2d+b 3)((2d)^2)-4c+(a^2)

4 * (-2.5) * 10 = -1002)4(4 2 ) - 2(-6) + (-2.5) = 73.53)(2(-6)) 2 - 4(10) + (4) 2 = 120
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Answered by Huw M. • Maths tutor
1457 Views

A fair die has six faces numbered 1, 1, 1, 2, 2, and 3. The die is rolled twice and the number showing on the uppermost face is recorded. Find the probability that the sum of the two numbers is at least three.

There are a couple of ways to approach this. A grid showing all the possibilities can be drawn up, which would help to illustrate the solution a little more explicitly. For now, let's talk through the logic....
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Answered by Anthony S. • Maths tutor
8271 Views

Calculate the mean value of 34,35,36,32,39.

Mean is the average value, to calculate it you have to add up all the values and divide it by the number of values.So in this case, adding up: 34 + 35 + 36 + 32 + 39 = 176Then, divide the sum by number of va...
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Answered by Haushala T. • Maths tutor
4701 Views

Given the two equations [1](3x + 4y = 23) and [2](2x + 3y = 16), find the values of x and y

One way to find the values of x and y is to substitute the value of x into one of the equations. To sub in x we need to rearrange an equation to get x on its own. We can change the second equation to x = (16...
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Answered by Stephen H. • Maths tutor
3840 Views