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Luba_88 [7]
3 years ago
8

()) Evaluate the expression. -15 - -14 / 1 + -9 x -11

Mathematics
2 answers:
Alina [70]3 years ago
7 0

Answer:

-15--14/1 +-9x-11

-15+14+99

-1+99

98

xxMikexx [17]3 years ago
7 0
I believe the simplified expression is -12-9x because there is no equal sign in the equation, which means you can not figure out what x is, you have to combine like terms.
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A radioactive substance has a continuous decay rate of 0.056 per minute. How many grams of a 120 gram sample will remain radioac
sammy [17]

Answer:

The mass of the radioactive sample after 40 minutes is 12.8 g.

Step-by-step explanation:

The mass of the sample can be found by using the exponential decay equation:

N_{t} = N_{0}e^{-\lambda t}

Where:

N(t): is the amount of the sample at time t =?

N₀: is the initial quantity of the sample = 120 g

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Hence, the mass of the sample after 40 min is:

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Therefore, the mass of the radioactive sample after 40 minutes is 12.8 g.

I hope it helps you!

5 0
3 years ago
17. You have $75 in your bank account. Each week you plan to deposit $8 from your allowance and $10 from your paycheck
Vanyuwa [196]

Answer:

60 weeks

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195 = 75 + (10 + 8)w

195 - 75 = (10 + 8)w

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6 0
3 years ago
In meters what is the value of x? Pls i really dont know how to do this
Hitman42 [59]

Answer:

x = 75 m

Step-by-step explanation:

This is a problem of similar triangles solved using proportions.

In similar triangles, corresponding side lengths are proportional.

Here the small and large triangles are similar because the have all three angles congruent.

By proportions, identifying corresponding sides,

x/45 = 50/30

solve for x

x = 45*(50/30) = 75 m

6 0
3 years ago
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