Translate into Mathematical Statements 1.Four times the...

Translate into Mathematical Statements 1.Four times the square of a number 2. One –half a number 3. Three less than twice a number 4. Five more than three a number 5. The square of the sum of 5 and a number 6. There are twice as many boys as there are girls 7. There are 10 more cars than jeeps 8. A man’s age 10 years ago 9. The area of a rectangle whose length is 7 more than the width.

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Transcript

00:01 Okay, we have here 10 statements, which i want to translate into a mathematical statement.

00:07 First one says four times the square of a number.

00:13 The number will say is x.

00:15 I want four times the square of that, so i square it first and then times by four.

00:21 It's four x squared.

00:24 Don't write this.

00:25 It's not four x squared.

00:28 That's wrong.

00:29 It's four x squared.

00:31 Number two says one half a number well x is the number and just do one half of x or if you like write it as x number two number three says three less than twice a number so x is my number twice that is two x three less take away three so it's two x minus three number four says five more than times a number.

01:06 So the number is x again.

01:08 Three times a number is three x, five more, just add all five.

01:15 So number five, the square of the sum of five and a number.

01:22 So what i do, i take five and add a number and square it.

01:29 All in brackets, square.

01:35 Number six, there are twice as many boys as there are girls.

01:43 So, if we have then that b is number of boys and g number of girls, b is twice g.

01:53 B equals 2g...

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