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Nostrana [21]
3 years ago
6

I really need help please

Mathematics
1 answer:
Mkey [24]3 years ago
7 0
So.. let's say ∡AGB and ∡BGC are say "a" units wide, and ∡CGD and ∡DGE are "b" units wide

notice the picture below

all angles added up together, will make up just a flat line, or 180°

now, notice in the picture, the ∡BGD is really just " a + b " wide, notice the green angle in the picture of ∡BGD, well, we know what a + b is

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There are 60 seats on a train. 6 of the seats are empty. What percentage of the seats on the train are empty?
sergij07 [2.7K]

Answer:

10%

Step-by-step explanation:

  1. Set up a proportion: \frac{6}{60} = \frac{x}{100}  
  2. Cross multiply, then divide: 6 × 100 = 600, 600 ÷ 60 = 10
  3. 10/100 = 10%

I hope this helps!

6 0
2 years ago
The histogram gives information about the waiting time
Darya [45]

Answer:

what historian

what was the information

6 0
2 years ago
What are the solutions of each equation? <br> a. x2 + 4 = 4<br> b. x2 + 16 = 0<br> c. x2 − 49 = 0
OLga [1]

Answer:

a. x=0

b x=-8

c x=49/2

Step-by-step explanation:

a. x2+4=4

subtract 4 from both sides

x2=0

multiply

2x=0

divide by 2

x=0

b x2 + 16 = 0

multiply

2x+16=0

subtract both sides by 16

2x=-16

divide by 2

x=-8

c  x2 − 49 = 0

multiply

2x-49=0

add 49 to both sides

2x=49

divide both sides by 2

x=49/2

5 0
3 years ago
Read 2 more answers
1] If 221ₓ= 25₁₀ find X<br> 2] if 3ₓ + 34ₓ - 40ₓ = 0 find x<br> 3] if 23ₓ = 1111₂ find x
Olin [163]

1.

2\cdot x^2+2\cdot x^1+1\cdot x^0=25\\2x^2+2x+1=25\\2x^2+2x-24=0\\x^2+x-12=0\\x^2+4x-3x-12=0\\x(x+4)-3(x+4)=0\\(x-3)(x+4)=0\\x=3 \vee x=-4

The base can't be negative, therefore x=3.

2.

3\cdot x^0+3\cdot x^1+4\cdot x^0-4\cdot x^1+0\cdot x^0=0\\3+3x+4-4x=0\\x=7

3.

2\cdot x^1+3\cdotx^0=1\cdot 2^3+1\cdot2^2+1\cdot2^1+1\cdot2^0\\2x+1=8+4+2+1\\2x=14\\x=7

5 0
2 years ago
recall that the difference between a country's exports and imports is called the country's trade balance. suppose last year the
vovangra [49]

Let's call trade balance b, exports e and imports i.

We now construct formula.

b=\Delta{ei}=e-i

Put in the data from last year.

b=968-1658=\boxed{-690}

U.S trade balance for that year is -690 billion dollars.

7 0
3 years ago
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