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givi [52]
3 years ago
9

The expression - 340 + 13x represents a submarine that began at a depth of 340 feet below sea

Mathematics
1 answer:
kirill115 [55]3 years ago
8 0

Answer:

A) The submarine was -249  feet below sea level after 7 minutes.

B) The submarine will have reached sea level after 26.15384615384615 minutes.

Step-by-step explanation:

x = 7 minutes

So...

Our equation will be -340 + 13 x 7 =

First, we will solve the multiplication.

13 x 7 = (10 x 7) + (3 x 7) = 70 + 21 = 91.

Then, we solve the addition. -340 + 91 = 340 - 91 = 249

So, the submarine was -249 feet below sea level after 7 minutes.

<em>-kiniwih426</em>

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