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Doss [256]
2 years ago
9

a 20-m ladder is leaning against the wall of a building which is 16m high.how far is the foot of the ladder to the building?​

Mathematics
1 answer:
mrs_skeptik [129]2 years ago
7 0

Answer:

12 m

Step-by-step explanation:

This can be solved using the Pythagorean theorem

a^2 = b^2 + c^2

20^2= 16^2 + c^2

400= 256 + c^2

400-256= c^2

144 = c^2

c = √144

c= 12

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Given a bag of 5 blue, 3 green, and 8 red marbles.. What is the probability of picking a blue
Anvisha [2.4K]

b = 5, \: g = 3, \: r = 8

total = 5 + 3 + 8 = 16

p(b) =  \frac{5}{16}

p(g |without \: replacement|) =  \frac{3}{16 - 1}  =  \frac{3}{15}  =  \frac{1}{5}  \\

p(b \: and \: g) =  \frac{5}{16}  \times  \frac{1}{5}  =  \frac{1}{16}

6 0
3 years ago
Evaluate each expression for w=5, x=3, y=4 and z=8.<br> 3y+6/2x
Aliun [14]
Plug in your numbers so the equation will turn out to be 3(4)+6/2(3) , you need to simplify 6/2 which will be 3 and 3 times 3 = 9 so the equation will be 3(4)+9 and 3 times 4 = 12 so the equation will now be 12+9 = 21
Answer= 21
4 0
3 years ago
You are planning on making 250 liters of chili for a big fundraiser you are throwing. You want the
Anvisha [2.4K]

Answer:

30%

Step-by-step explanation:

because you use %

so that is why i think but i am not sure

7 0
3 years ago
Question 4
Ilia_Sergeevich [38]

Answer:

2

Step-by-step explanation:

Given

See attachment for chart

Required

Number of off days

To do this, we simply calculate the expected value of the chart.

This is calculated as:

E(x) = \sum x * f

Where

x = days

f = chances

So, we have:

E(x) = 0* 0.3 + 1 *0.2 + 2 * 0.25 + 3  * 0.2 + 4  * 0.02 + 5 * 0.01 + 6 * 0.01 + 7 * 0.01

E(x) = 1.56

E(x) \approx 2

3 0
2 years ago
PLZ Help fast. It's Pre Calculus. This is the only day i get to spend time with my baby sister. please help fast. WILL MARK BRAI
Ivahew [28]
1) x³ + 2x² - x - 2                            2) 2x³ + 5x² - 8x - 20 = 0

x²(x + 2) - (x + 2)                                x²(2x + 5) - 4(2x + 5) = 0

(x + 2)(x² - 1)                                      (2x + 5)(x² - 4) = 0

(x + 2)(x - 1)(x + 1)                             x = -5/2, +-2

x = -2, 1, -1   << a is the answer.

hope that helps, God bless!
5 0
3 years ago
Read 2 more answers
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