2 years ago

If A = -3n + 2 and B = 5n - 7, what is the value of A - B, in simplest form?

Mathematics

1 answer:

denis23 [38]2 years ago

8 0

Answer:

-8n-5

Step-by-step explanation:

A - B

-3n + 2 - 5n - 7

-8n - 5

Hope this helps!

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Kyle is practicing for a 3-mile race. His normal time is 23 minutes 25 seconds. Yesterday it took him only 21 minutes 38 seconds

diamong [38]

Answer:2:24

Step-by-step explanation:

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2 years ago

Myra won the hurdles event for the seventh graders. She completed the race in 22.8 seconds and knocked down 1 hurdle. Byron won

Nadya [2.5K]

Answer:

Myra: 24.8s (winner)

Byron: 26.3s

Step-by-step explanation:

Myra knocked down 1, so therefore there are 2 points added onto her time and it is now 24.8s.

Byron knocked down 3, so there are 6 points added on for 2 seconds per each hurdle. His time is now 26.3

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2 years ago

The number that is 75% of one less than a number n.

gizmo_the_mogwai [7]

Answer:

The number is n-0.75

Step-by-step explanation:

Here in this question, we are interested in giving a number which is 75% of 1 less than a number n.

The first thing we do here is to calculate the value of 75% of 1.

That would be;

75/100 * 1 = 0.75

So this value less than n will be;

n- 0.75

7 0

2 years ago

Old faithful in Yellowstone National Park shoots water 60 feet into the air that casts a shadow of 42 feet. What is the height o

Serhud [2]

Answer:

The height of near by tree will be 90 feet.

Step-by-step explanation:

Considering the water triangle as shown in figure a.

As the old faithful shoots water 60 feet into the air that casts a shadow of 42 feet.

Considering the tree triangle as shown in figure a. The tree triangle has a shadow 63 feet long.

Let x be the height of near by tree that cost a shadow 63 feet long.

Assuming that the triangles are similar

So,

the ratios of similar triangles will be related as:

$\frac{63}{42}=\frac{x}{60}$

$\mathrm{Switch\:sides}$

$\frac{x}{60}=\frac{63}{42}$

${x}=60.\frac{63}{42}$

$x=90$ feet

Therefore, the height of near by tree will be 90 feet.

Keywords: ratio, similar triangle

Learn more about similar triangle from brainly.com/question/10161974

#learnwithBrainly

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2 years ago

Carla and Marty have three straws. The straws have lengths 8 inches, 10 inches and 14 inches. They are going to use their straws

IgorLugansk [536]

Carla is correct because they will not all be exactly the same unless they choose to make them all be the same. Hope I could help! :D

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2 years ago