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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(4²) - 2(-6) + (-2.5) = 73.53)(2(-6))²- 4(10) + (4)² = 120

Answered by Huw M. • Maths tutor

972 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 log...

Answered by Anthony S. • Maths tutor

6797 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...

Answered by Haushala T. • Maths tutor

2752 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 = ...

Answered by Stephen H. • Maths tutor

2681 Views

A brother and sister share some pocket money together in the ratio of 4:7. The brother receives £18 less than his sister. How much pocket money do the brother and sister get each?

The brother receives £18 less, meaning the sister receives £18 more than the brother.7 - 4= 3. This means that 3 parts of the ratio is equal to £18, therefore 1 part of the ratio is equal to £6.Brother ge...

Answered by Jojo D. • Maths tutor

2091 Views