Question

if the terms 7,a,a,63are in proportion, then a is 7:3​

Answer 1

Answer:

From the following pairs of numbers, find the reduced form of ratio of first number to ... If ab= 73 then find the values of the following ratios. ... (ii) 10x2 + 15x + 635x2 - 25x + 12= 2x + 3x - 5

Step-by-step explanation:

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Answer 2

Answer:

7, a, a, 63 are in proportion

it means

$\frac{7}{a} = \frac{a}{63} \\ {a}^{2} = 7 \times 63 \\ = 7 \times 3 \times 3 \times 7 \\ so \: a \: = 3 \times 7 \\ a = 21$