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harina [27]
3 years ago
14

B) Write an expression for fin terms of d. c) Work out e-f Simplify your answer.

Mathematics
1 answer:
olga2289 [7]3 years ago
7 0

Answer:

3d+ e+f

Step-by-step explanation:

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Jack rides his bicycle 4 miles in 30 minutes. If he maintains this rate, how far will he ride in 3 hours?
Tpy6a [65]

Answer:

24

Step-by-step explanation:

8 0
2 years ago
Sarita deposits $1,00 in an account paying 3.4% annual interest compounded continuously. Use the formula to continuous compounde
charle [14.2K]

Answer:

Step-by-step explanation:

a  : 1,000

b : 350

4 0
2 years ago
Potassium helps the human body prevent muscle cramping. Researchers sampled 52 random professional wrestlers. The average potass
ELEN [110]

Answer:

D. The 95% confidence interval is (3.4102, 4.1898). We are 95% confident that the true population mean potassium level for professional wrestlers will be between 3.4102 millimoles per liter and 4.1898 millimoles per liter.

Step-by-step explanation:

Hello!

The variable if interest is X: potassium level of a professional wrestler  (mmol/L)

A sample of n= 52 professional wrestlers was taken and a sample mean of X[bar]= 3.8 mmol/L and a sample standard deviation of S= 1.4 mmol/L

You have to estimate the population average potassium level using a 95% confidence interval. Assuming that the variable has a normal distribution, and since the population variance is unknown, I'll use a student t to construct the interval:

[X[bar] ± t_{n-1;1-\alpha /2}* \frac{S}{\sqrt{n} }]

t_{n-1;1-\alpha /2}= t_{51;0.975}= 2.008

[3.8±2.008*\frac{1.4}{\sqrt{52} }]

[3.4102; 4.1898]

With a 95% confidence level you'd expect that the interval [3.4102; 4.1898]mmol/L will contain the average potassium level of professional wrestlers.

I hope this helps!

5 0
2 years ago
One fourth plus three over two
Talja [164]

Answer:

7/4

Step-by-step explanation:

okay so this would be

1/4+3/2

to do this we need to get a common denominator

we can do this by multiplying 3/2 by 2/2

where we would get

6/4

so then

1/4+6/4

7/4

or

1 3/4

7 0
2 years ago
Read 2 more answers
You are at a fruit stand to get some fresh produce. You notice that the person in front of you gets 5
baherus [9]

Answer:

5A + 4P = 10

5A + 5P = 11

1 apple costs $1.2

1 pear costs $1

Step-by-step explanation:

Represent Apples with A and Pears with P

For the person in my front, the expression is:

5A + 4P = 10

For me, the expression is

5A + 5P = 11

Hence, the system of equation is:

5A + 4P = 10

5A + 5P = 11

Solving for the values of A and P.

Substract equation (2) from (1)

5A - 5A + 4P - 5P = 10 - 11

-P = -1

P = 1

<em>Hence, 1 pear costs $1</em>

Substitute 1 for P in 5A + 4P = 10

5A + 4 * 1 = 10

5A + 4 = 10

5A = 10 - 4

5A = 6

A = \frac{6}{5}

A = \$1.2

<em>Hence, 1 apple costs $1.2</em>

7 0
2 years ago
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