3 years ago

Question12....................................

Mathematics

1 answer:

tatyana61 [14]3 years ago

5 0

Answer:

u = ± 4

Step-by-step explanation:

Given

u² = 16 ( take the square root of both sides )

u = ± $\sqrt{16}$ = ± 4

u = - 4, u = 4

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3 years ago

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Answer:

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Step-by-step explanation:

Let the number of nickels be $x$ .

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Therefore, there are $8x + x = 9$ coins in total. To find what $x$ is, we need to solve the equation $9x = 18.$ This can be done by dividing both sides by $9$ which gives $x=2$ . Plugging these values in tells us that there are $2$ nickels and $16$ dimes. (Test it out!) Thus, the nickels are worth $2 \cdot 5 = 10$ cents and the dimes are worth $16 \cdot 10 = 160$ cents, so in all, you have $10 + 160 = 170$ cents which is $1.70.