Write an algebraic expression for the phrase "thirty less than the product of a number y and four".

Mathematics

2 answers:

zzz [600]2 years ago

8 0

Answer:

30-(y*4)

Step-by-step explanation:

replace thirty with 30. less than is - (minus). the product of a number y and four. replace four with 4. the product is the answer of the multiplication problem. so the multiplication problem here would be y*4. so the full answer is

30-(y*4)

Anarel [89]2 years ago

5 0

Answer: Y * 4 - 30 I believe is the correct expression.

Step-by-step explanation:

30 less is -30 of a number.

The product of Y and 4 looks like Y * 4.

The expression will as a result equal Y * 4 - 30.

It can also look like 4y - 30.

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(a) Work out the reciprocal of 1.25

Oxana [17]

Answer:

0.8 OR $\frac{4}{5}$

Step-by-step explanation:

The reciprocal of any number is the number that it multiplies by to equal 1.

The reciprocal can be found by simply converting the number into a fraction and then 'flipping' the fraction as any number multiplied by its reciprocal is 1.

E.g.

No. X/Y * Y/X (its reciprocal) = 1

$\frac{x}{y} *\frac{y}{x} =\frac{xy}{xy} =1$