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3 years ago

Sita Rahim drove due north for 3 hours at 46 miles per hour. From the

Mathematics

1 answer:

Phantasy [73]3 years ago

6 0

Answer:

224 miles

Step-by-step explanation:

What you would do is take the 3 hours times the 46 mph to get 138 miles.

3*46=138

Next, multiply the 2 hours by the 43 mph to get 86 miles.

2*43=86

Lastly, you're going to add the two.

138+86=224 miles.

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2 years ago

Determine the sum of the arithmetic series: 5+18 +31 +44 + ... 161.

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Answer:

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Step-by-step explanation:

Hello,

18-5 = 13

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So we need to compute

$\displaystyle \sum_{k=0}^{k=12} \ {(5+13k)}\\\\=\sum_{k=0}^{k=12} \ {(5)} + 13\sum_{k=1}^{k=12} \ {(k)}\\\\=13*5+13*\dfrac{12*13}{2}\\\\=65+13*13*6\\\\=65+1014\\\\=1079$

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3 years ago

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3 years ago

Solve for x.<br>A. x =9<br>B. x = 3<br>C. x = 4<br>D. x = 27

meriva

Your formula for this is $9^{2} =x(24+x)$ and $81=24x+ x^{2}$ . Get everything on one side of the equals sign, set it equal to 0 and factor. When you do this you get (x-3)(x+27). The Zero Product Property rule tells us that either x-3 = 0 or x+27 = 0 and that x = 3 and -27. The only thing in math that will NEVER be negative besides time is distance/length, therefore, x cannot be 27 and has to be 3.

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