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3 years ago

2(15) - 3(4) What is the answer

Mathematics

1 answer:

makkiz [27]3 years ago

5 0

Answer:

Step-by-step explanation:

Do $2(15)$ to get 30.

Do $-3(4)$ to get -12.

Do $30-12$ to get 18.

18 is the answer.

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Marcus has $30 but needs a total of $45 to buy a new soccer jersey. What percent of the money has he saved for the purchase?

Dimas [21]

Answer:

30 is 66.67% of 45.

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3 years ago

Frank stands 500 feet from the base of the Statue of Liberty. If Frank looks up with an angle of elevation of 30', how tall is t

Over [174]

Answer: 289 ft.

Explanation:

You can form a right triangle with these features:

1) Base = adjacent-leg = 500 feet

2) angle between the hypotenuse and the base = 30° ( I use 30° instead of 30', because 30' does not make sense, it is a too small angle)

3) Height = opposite-leg = height of the Statue of LIberty = x

Now, use the equation for the trigonometric ratio tangent:

tan(angle) = opposite-leg / adjacent-leg

=> tan (30°) = x / 500ft

=> x = 500ft * tan(30°)

x = 288.67 ft which rounded to the nearest foot is 289 ft.

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3 years ago

Can someone assist me with this problem?

dexar [7]

Answer:649

Step-by-step explanation: you have to add

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3 years ago

The temperature of a pan of hot water varies according to newton's law of cooling: , where t is the water temperature, a is the

NeTakaya

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3 years ago

Birth weights in Norway are normally distributed with a mean of 3570 g and a standard deviation of 500 g. Find the probability t

Anettt [7]

Answer:

D) 0.0796

Step-by-step explanation:

Birth weights in Norway are normally distributed with a mean of 3570 g and a standard deviation of 500 g.

mean = 3570 and SD = 500

We need to find P(3500<x<3600)

P(3500<x<3600)= P(x=3600)- P(x=3500)

to find P(x=3600) we find z-score

$z= \frac{x-mean}{SD} =\frac{3600-3570}{500} =0.06$

Now use z-score table . z-score = 0.5239

P(x=3600)=0.6179

to find P(x=3500) we find z-score

$z= \frac{x-mean}{SD} =\frac{3500-3570}{500} =-0.14$

Now use z-score table . z-score = 0.4443

P(x=3600)=0.4443

P(3500<x<3600)= P(x=3600)- P(x=3500)

P(3500<x<3600)=0.5239-0.4443 = 0.0796

8 0

3 years ago

Read 2 more answers