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3 years ago

What is the value of the expression -78-a, when a= -29?

Mathematics

2 answers:

kherson [118]3 years ago

6 0

Hey there!

-78 - a

= -78 - (-29)

= -78 + 29

= -49

Therefore, your answer is: -49

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

Lady bird [3.3K]3 years ago

3 0

ANSWER:
-78-a
= -78-(-29)
= -78+29
= -49

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Answer:

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3 years ago

I need help on it, I don’t know what I’m supposed to do

bogdanovich [222]

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See the attached diagram.

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3 years ago

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Monica [59]

Answer:

1. 41/45.

2. x/(x^2+3x+6)

Step-by-step explanation:

So first we fill the ven diagram.

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now, since we want the probability that a student is chosen that is in band, and choir, and both. We add all this up

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dlinn [17]

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Step-by-step explanation:

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The angle where the tree meets the ground is 90°, so the triangle a right triangle.

So this all means you know one angle of a right triangle (70°) and the side adjacent to this angle (41.5 meters). You're solving for the height of the tree, which is the side opposite of the angle you know. You can solve using either Sine, Cosine, or Tangent.

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This isn't the number to input into the calculator -- you need to isolate the variable:

The original equation is:

tan 70 = x/41.5

Multiply both sides by 41.5 (To cancel out the denominator and isolate x)

tan 70 (41.5) = x

Now you've got the equation for x, you're ready to put this in your calculator.

What appeared on your calculator was:

tan(__)

Input like follows:

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The brackets are needed like that so the calculator knows to multiply the entire thing by 41.5. You might get a wrong answer otherwise.

Hit enter, and you'l get the height of the tree:

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