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OleMash [197]
3 years ago
5

A 32-m tall building casts a shadow the distance from the top of the building to the tip of the shadow is 34 m find the length o

f the shadow if necessary round your answer to the nearest tenth
Mathematics
2 answers:
kramer3 years ago
8 0

Answer:

Step-by-step explanation:

Svetllana [295]3 years ago
6 0

You can find this answer by simply doing the reverse of the Pythagorean Theorem. The formula for Pythagorean Theorem is a^2+b^2=c^2, so the reverse would be b^2=c^2-a^2. All we have to do is substitute in the numbers and solve.

b^2=c^2-a^2

b^2=36^2-32^2

b^2=272

sqrt(b^2) sqrt(272)

b=16.492

Since we are rounding to the nearest tenth, our answer will be 16.5 meters.

You might be interested in
Myra is evaluating the expression –31. 7 4. 5x, when x = 2. 1. -31. 7 4. 5(2. 1) –27. 2(2. 1) –57. 12 What was Myra’s error? Myr
murzikaleks [220]

This is just an algebraic problem, the correct option is:

<em>"Myra should have multiplied 4.5 and 2.1 first."</em>

<h3>How to evaluate an expression?</h3>

Here we want to evaluate the expression:

-31.7 + 4.5*x

in x = 2.1

This just means that we need to replace x by 2.1 in the given equation.

Now, what Myra does is:

-31.7 + 4.5*2.1 = -27.2*2.1

So she took the sum between -31.7 and 4.5 first, this is her mistake, you only would do that if the expression was:

(-31.7 + 4.5)*2.1

But in our expression:

-31.7 + 4.5*2.1

The first thing you need to solve is the product in the second term, so we get:

-31.7 + 4.5*2.1 = -31.7 + 9.45 = -22.25

If you want to learn more about algebra, you can read:

brainly.com/question/4344214

4 0
2 years ago
A number five times is twenty<br> five.<br> (write the equation )
Eva8 [605]

Answer:

5x=25

Step-by-step explanation:

if you need the answer

5x5=25

5+5+5+5+5=25

5 0
2 years ago
What is the value of the expression below when b = 8.5?
Simora [160]
The answer is d hope this helps
7 0
3 years ago
Anyone know how to factorise this please ?! :)
raketka [301]

9514 1404 393

Answer:

  a) (x +2)(x +3)

  b) x = -2 or -3

Step-by-step explanation:

a) The constants in the binomial factors will be divisors of 6 that have a sum of 5. You know that ...

  6 = 1×6 = 2×3

The sums of these factor pairs are 7 and 5. You want the pair 2, 3. The factors are ...

  x² +5x +6 = (x +2)(x +3)

__

b) The solutions to the equation are the values of x that make the factors zero:

  (x +2) = 0   ⇒   x = -2

  (x +3) = 0   ⇒   x = -3

6 0
3 years ago
How come this person didn’t divide EVERYTHING on the left by 2? I thought you had to...
damaskus [11]

The short answer is that algebra doesn't work that way. You wouldn't divide *everything* by 2, but every term that contains a factor of 2.

In the expression

2 (6<em>x</em> - 1) + 2 (2<em>x</em> + 5)

both terms have a factor of 2 (the 2 out in front of them). They're the ones that get canceled when dividing by 2:

(2 (6<em>x</em> - 1) + 2 (2<em>x</em> + 5)) / 2 = 2/2 (6<em>x</em> - 1) + 2/2 (2<em>x</em> - 5)

… = 1 (6<em>x</em> - 1) + 1 (2<em>x</em> - 5)

… = (6<em>x</em> - 1) + (2<em>x</em> - 5)

and so on.

Looking ahead, it turns out that the equation is solved by <em>x</em> = 7. This makes 6<em>x</em> - 1 = 41 and 2<em>x</em> + 5 = 19. So the equation is saying that, if you make these replacements,

2×41 + 2×19 = 120

If you divide *everything* on the left by 2, you end up with fractions:

(2/2)×(41/2) + (2/2)×(19/2) = 41/2 + 19/2

but 41 + 19 = 60, so the end result would be 30, but that's not the same as 120/2 = 60.

5 0
2 years ago
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