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Dennis_Churaev [7]
3 years ago
5

-q2 - r2+ 3s if q = 9, r = -6, s = -20 how do I solve this?

Mathematics
1 answer:
ANEK [815]3 years ago
6 0

Step-by-step explanation:

-9(2)-(-6)(2)+3(-20)

(−9)(2)−(−6)(2)+(3)(−20)

=−18−(−6)(2)+(3)(−20)

=−18−(−12)+(3)(−20)

=−6+(3)(−20)

=−6+−60

=−66

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Answer:

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3 years ago
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Answer:

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Step-by-step explanation:

1. Approach

To solve this problem, first one needs to calculate the sales tax, then one must add that to the amount spent on the purchase. To calculate sales tax, one must convert the percent to decimal form, this can be done by dividing the percent by 100. Then one will multiply the decimal by the amount spent.

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<u>b. multiply the decimal by the amount spent</u>

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Now all one has to do is add the amount spent in tax by the amount spent on the purchase.

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Since money is only spent rounded to the second decimal point, one has to round the number;

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