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Elis [28]
3 years ago
8

How do we find the value of -q in the equation -q-3=7

Mathematics
1 answer:
Cloud [144]3 years ago
3 0

-q is -10. Because the number sentence equals to -q=7+3. So q = -10.

put in(recheck): --10=7+3

                          +10=10

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Find the mass at time t=0. ANSWER HAS TO BE IN GRAMS
777dan777 [17]

For part (a) the answer is 400 grams for part (b) 198.63 grams and for part (c)  20 years.

<h3>What is exponential decay?</h3>

During exponential decay, a quantity falls slowly at first before rapidly decreasing. The exponential decay formula is used to calculate population decline and can also be used to calculate half-life.

We have an equation for radioactive decay:

\rm m(t) = 400e^{-0.035t}

a) Plug t = 0

\rm m(0) = 400e^{-0.035\times 0}

m(0) = 400 grams

b) plug t = 20 years

\rm m(20) = 400e^{-0.035\times 20}

After solving:

m(20) = 198.63 grams

c) Plug m(t) = m(0)/2 = 400/2 = 200 grams

\rm 200 = 400e^{-0.035t}

x = 19.80 years ≈ 20 years

Thus, for part (a) the answer is 400 grams for part (b) 198.63 grams and for part (c)  20 years.

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brainly.com/question/14355665

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3 0
2 years ago
A sporting goods store buys a basketball for $10.00 and then adds a 110% markup to the price. How much will the basketball sell
sweet-ann [11.9K]

Answer: The basketball will sell for $21 .

Step-by-step explanation:

Hi, to answer this question, first, we have to multiply the cost of the basketball (10) by the percent markup in decimal form (divided by 100).

Mathematically speaking:

10 x (110/100) = $11

Now, we have to add the markup amount (11) to the cost (10) to obtain the selling price:

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The basketball will sell for $21 .

3 0
3 years ago
Read 2 more answers
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Answer:

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Step-by-step explanation:

The equation of a line in slope- intercept form is

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Given

2x + 3y + 1 = 0 ( subtract 2x + 1 from both sides )

3y = - 2x - 1 ( divide terms by 3 )

y = - \frac{2}{3} x - \frac{1}{3} ← in slope- intercept form

with m = - \frac{2}{3} and c = - \frac{1}{3}

4 0
2 years ago
Please help! Chapter test tomorrow!!<br>PLEASE i need to show the work, the equations.
Nana76 [90]

Answer:

x=6

Step-by-step explanation:

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4 0
3 years ago
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Five dogs were running in a race. Bandit completed the race 10 seconds after Sergeant and 30 seconds before Sally. Smokey comple
ipn [44]

Answer:

The Answer is D

Step-by-step explanation:

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3 years ago
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