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Mathematics

2 answers:

maks197457 [2]2 years ago

8 0

Answer:

Step-by-step explanation:

not a perfect square

professor190 [17]2 years ago

7 0

Answer: 9

Step-by-step explanation: 9 doesn't belong, because if you add up the digits in all of the other numbers, they give you 7. 9 is the only number that doesn't give you 7. I say 16 is the number that doesn't belong because 9, 25, and 43 are all odd numbers and 16 is even.

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7 x + 12 = 2 ( 4 x − 5 )

lorasvet [3.4K]

Answer:

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Step-by-step explanation:

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1 year ago

in a certain chemical, the ratio if zinc to copper is 3 to 16. a jar of the chemical contains 320 grams of copper. how many gram

Dennis_Churaev [7]

Answer:

60 grams

Step-by-step explanation:

For these type of questions, we can equate the ratio with the actual amounts. We will let the quantity to find be an unknown variable, such as x. Then we equate the ratios, cross multiply, and use algebra to solve.

Let grams of zinc be "x", so we can write the ratios and actual amounts as:

$\frac{3}{16}=\frac{x}{320}$