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1 year ago

Which sign makes the statement true? (3 × 7) 21 = 1

1 answer:

8 0

The sign that would make the statement true is the division sign which would then make the full expression, (3 × 7) ÷ 21 = 1.

The statement given is (3 × 7) 21 = 1. There is therefore a need to find the sign that would be between the brackets and "21" which would lead to the answer being 1.

The brackets have to be solved first according to the PEMDAS rule which calls for parenthesis being solved first.

Solving the expression in the brackets gives:

= 3 x 7

= 21

We therefore need a sign that when related to 21 would give the result, 1.

The only sign that can relate 21 to 21 such that the answer would be 1, is division:
= 21 / 21

= 1

In conclusion, the sign that would make the statement true is a division sign.

Find out more on mathematical signs at brainly.com/question/24034494

#SPJ1

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3 years ago

ln(y+1)-lny=1+3lnx . Express y in terms of x, in a form not involving logarithms. (4 marks, Maths CIE A level)

Delicious77 [7]

$remember$
$ln(x)=log_e(x)$
$and$
$log_x(a)-log_x(b)= log_x( \frac{a}{b} )$
$and$
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$and$
$blog(a)=log(a^b)$

$so$

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$minus$ $ln(x^3)$ $from$ $both$ $sides$

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$translate$

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$times$ $both$ $sides$ $by$ $yx^3$

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$minus$ $y$ $from$ $both$ $sides$

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$divide$ $both$ $sides$ $by$ $(ex³-1)$

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3 years ago

Read 2 more answers

the circumference of a circle is 11.4mm. find the length of the diameter. give your answer rounded to 3SF.

kvasek [131]

Answer:

3.627 = d

Step-by-step explanation:

C = 11.4mm

d = ?

C = πd

11.4 = 22/7 × d

cross multiply

11.4 ×7 = 22d

79.8 = 22d

Divide both sides of the equation b 22

79.8/22 = 22d/22

3.627 = d

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3 years ago

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-BARSIC- [3]

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