Are any of these in a 1: 2: 1 ration form? if so how do you know? will mark as b. a
1) 3: 8: 3
2) 16: 22: 2
3) 18: 32: 16

No, none of these are in a 1:2:1 ratio form. To find out we simply divide the first number by the original number, then multiply the other original numbers by what we just got to find out if it works.

Let's try #1.

3/1 = 3. 2(3) = 6. We now already know that #1 is incorrect because it says 8 instead of 6.

#2 and #3

We can tell these are both wrong because the first and last number have to equal the same, but in these they are different.

Hope this helps you! :)

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents