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jekas [21]
3 years ago
8

A foam toy is 2 inches wide. It doubles in size for every minute it is in water. Write an expression for the width of the toy af

ter 5 minutes. What is the width after 5 minutes?
The answer is easier to find, but I don't know what the expression would be.
Mathematics
1 answer:
alexgriva [62]3 years ago
6 0

So it should be y = 2*2^x
Where x is the time and y is the final width after x minutes

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Write an equation of a line in slope-intercept form if the slope is ½ and the y-intercept is -2.
Serjik [45]
Y = mx + b

y = 1/2x - 2

HOPE THIS HELPS!!!!!!
7 0
4 years ago
You just found a positive trend line showing a strong relationship between homework scores and test scores for five students. Ex
Scrat [10]

The positive trend among the homework scores and the test scores would reveal that if a student does well in homework, he is likely to do well in exams. This can be explained in the sense that the homework will serve as the practice for the student before finally taking the exam.

8 0
3 years ago
Read 2 more answers
5. Carla babysits and tutors to make extra money. She babysits for $5 an hour and tutors for $10 an hour.
HACTEHA [7]

Carla can babysit for 5 hours and tutor for 7 hours or babysit for 8 hours and tutor for 5.5 hours

<h3>How to graph the inequality?</h3>

Let x represents hours babysitting and y represents hours tutoring

So, we have:

Earnings = Rate of babysitting * x + Rate of tutoring* y

This gives

Earnings = 5x + 10y

He wants to earn at least $95.

This means that:

5x + 10y ≥ 95

See attachment for the graph of the inequality

From the attached graph, two possible solutions are: (5, 7) and (8, 5.5)

This means that Carla can babysit for 5 hours and tutor for 7 hours or babysit for 8 hours and tutor for 5.5 hours

Read more about inequalities at:

brainly.com/question/25275758

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5 0
2 years ago
Element X decays radioactively with a half life of 14 minutes. If there are 760 grams of Element X, how long, to the nearest ten
Mkey [24]

Answer:

85.5 minutes

Step-by-step explanation:

The amount of an element that will remain after time t can be expressed as a function of initial amount N0, time t, and half life th as;

Nt = N0 × e^(-λt)

Where;

Decay constant λ = ln(2)/th, substituting into the equation;

Nt = N0 × e^(-ln(2)t/th)

We need to make t the subject of formula;

Nt/N0 = e^(-ln(2)t/th)

ln(Nt/N0) = -ln(2)t/th

t = ln(Nt/N0) ÷ -ln(2)/th

Given;

Initial amount N0 = 760g

Final amount Nt = 11 g

Half life th = 14 minutes

the nearest tenth of a minute, would it take the element to decay to 11 grams can be derived using the formula;

t = ln(Nt/N0) ÷ -ln(2)/th

Substituting the given values;

t = ln(11/760) ÷ -ln(2)/14

t = 85.5 minutes

4 0
3 years ago
The first three steps of completing the square to solve the quadratic equation x^2 + 8x +5 = 0, are shown below.
evablogger [386]

Answer:

see explanation

Step-by-step explanation:

step 4 take the square root of both sides

\sqrt{(x+4)^2} = ± \sqrt{11}

x + 4 = ± \sqrt{11}

step 5 subtract 4 from both sides

x = - 4 ± \sqrt{11}

step 6 solve for x

x = - 4 - \sqrt{11} or x = - 4 + \sqrt{11}


8 0
3 years ago
Read 2 more answers
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