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3 years ago

What's the meaning of –(–3)?

Mathematics

2 answers:

Liula [17]3 years ago

4 0

Answer:

Step-by-step explanation:

if your subtracting a negitive it means your adding and its now a positive

aniked [119]3 years ago

4 0

-(-3) is equal to a positive 3

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If y is the red marbles and x is the blue marbles, then for every x value you would be able to multiply by 2 to get the y value... it is the equivalent of looking at is as the slope rise/run or 2/1

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3 years ago

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In a hospital ward, there are 10 nurses and 6 doctors. 4 of the nurses and 3 of the doctors are male. If a person is randomly se

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3 years ago

Pls answer if you only know the correct answer! Thanks! :)

dimaraw [331]

Answer:

-6.8

Step-by-step explanation:

its kinda hard to explain this problem

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3 years ago

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If a constant of proportionality is 1/5, what would the new constant of proportionality be if the x and y axes were flipped? (an

mixas84 [53]

Answer:

5/1 or 5

Step-by-step explanation:

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3 years ago

At 5 feet tall, Emily casts a shadow that is 8 feet long. She is standing near a tree that casts a shadow that is 28 feet long.

Thepotemich [5.8K]

Answer:

The tree is 17.5 ft tall

Step-by-step explanation:

We can use proportions to solve this.

Notice that Emily (5 feet tall) and her shadow (8 feet long) constitute the two legs of a right angle triangle (see attached image).

The nearby tree (unknown height H), will also cast a shadow (28 ft long) with the same inclination as Emily does due to the unique position of the sun relative to them.

Then we can use the proportion associated with the sides of similar triangles:

$\frac{5\,ft}{8\,ft} =\frac{H}{28\,ft}$

Then, we can solve for H in the equation:

$\frac{5\,ft}{8\,ft} =\frac{H}{28\,ft} \\H=\frac{28*5}{8} \,ft\\H=17.5 \.ft$

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3 years ago