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Vsevolod [243]
3 years ago
6

William scored 24.5 points out of 30 on his math assignment. His teacher subtracted 5 points for being late. How many points is

William aways from a perfect score?
Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
8 0

Answer:

William was 0.5 points away from a perfect score.

Step-by-step explanation:

If the teacher didn't subtract 5 points, he would have 24.5 + 5 = 29.5 points.

30 - 29.5 = 0.5

William was 0.5 points away from a perfect score.

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Someone please help me
Nataly_w [17]

Answer:

In the picture.

Step-by-step explanation:

Note : From 1 to 12 it's the same idea but without variables (very easy) so , just do the same idea.

I solved the problems contained variables

I hope that it's a clear explanation.

8 0
3 years ago
1. A plane is flying at an altitude of 13000 feet. The angle of depression from the plane to a control tower is 20 degrees. The
Mariulka [41]

Answer:

see explanation

Step-by-step explanation:

There is a right triangle formed between the height above the tower to the plane, the horizontal and the line from the tower to the plane.

The height above the tower to the plane = 13000 - 150 = 12850 ft

The angle between the plane and the tower is 20° , angle of depression.

Using the tangent ratio in the right triangle formed, with the adjacent side being the horizontal ( hor ) distance, then

tan20° = \frac{opposite}{adjacent} = \frac{12850}{hor} ( multiply both sides by hor)

hor × tan20° = 12850 ( divide both sides by tan20° )

hor = \frac{12850}{tan20} ≈ 35305 ft ( to the nearest foot )

(2)

Arianna is 60 + 5 = 65 ft above the ground ( to her eye level )

Using the right triangle formed with legs 65 and 37  and angle of depression x, then

tanx° = \frac{opposite}{adjacent} = \frac{37}{65} , thus

x = tan^{-1} (\frac{37}{65} ) ≈ 30° ( to the nearest degree )

4 0
3 years ago
Read 2 more answers
Simplify: -1/2(6n+4) +2n - 5
Maurinko [17]

Answer:

Step-by-step explanation:

\frac{-1}{2}(6n+4)+2n-5 \\\\\frac{-1}{2}2(3n+2)+2n-5\\ -(3n+2)+2n-5\\-3n-2+2n-5\\-n-7

5 0
3 years ago
syeda has finished 20% of her math assignment. The assignment includes 50 problems how many problems has syeda completed?
Nostrana [21]

Answer:

10 problems

Step-by-step explanation:

This is the answer because:

1) We have to solve for what 20% of 50 is since she finished 20% of her test:

20% of 50 = 10

\frac{2}{10} × \frac{50}{1} = \frac{100}{10} = 10

Therefore, the answer is 10 problems.

Hope this helps! :D

5 0
3 years ago
Tom drives a truck. His regular trip is a distance of 280 km. He drives at an average speed of 80 km/h. For safety reasons Tom’s
kakasveta [241]
Cost of fuel = 30% of $400 000 = 30/100 x 400000 = $120 000

Fuel amount = $120 000/$1.5 = 80 000 liters
new cost of fuel = 80000 x $1.6 = $144 000

increase in cost = 144000 - 120000 = $24000

So the increase in petrol price increases the operating cost by $24000
5 0
3 years ago
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