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faust18 [17]
3 years ago
14

Help asap ! -100x - 100 = 0 -100x = ? x = ?

Mathematics
1 answer:
marin [14]3 years ago
6 0

Answer:

-100x = 10 x = 1

Step-by-step explanation:

I did the math and this is what I got

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A school has 1,200 students. If 65% are girls, how many girls attend the school?
sergij07 [2.7K]
1200 x .65 = 780 girls
7 0
3 years ago
A geometric progression has a third term of 20 and a sum of infinity which is 3 times the first term. Find the first term ​
Anna007 [38]

Answer: the first term is 45

Step-by-step explanation:

Step 1: The formular for the nth term is ar^n-1 and since we're solving for the third term ar^3-1 = ar² which is equal to 20

So ar²= 20 and we make this equation i

Step 2: the formular for the sum of infinity is Sn = a/(1-r) and according the question the sum of infinity is equals to 3 *A ( A means the first term)

Further simplification gives us

3a= a/(1-r)

We simplify Futher by multiplying both sides by (1-r)

3a.(1-r) = a/(1-r).(1-r)

3a(1-r)=a

= 3a-3ar=a

Make 3ar the subject of the formula

3ar= 2a and lets make this equation (ii)

Step 3: From the first equation since ar²=20, let's make a the subject of the formula by dividing both sides by r²

Ar²/r² = 20/r²

A=20/r²lets make this equation (iii)

Step 4: subtitle a as 20/r² into equation (ii)

Since 3ar=2a

Then 3.(20/r²).r = 2. 20/r²

= (60/r²) .r = 40/r²

60/r = 40/r2

Multiplying both sides by r² gives us

60r = 40

Divide both sides by 20 gives us

= 3r= 2

Divide both sides by 3 gives us

= r = 2/3

Step 5: substitute r for 2/3 in equation i

ar²= 20

a. (2/3)2 = 20

= a.4/9 = 20

= 4a = 180

= a = 180/4

a = 45

5 0
3 years ago
Six people can be seated at a table. If two tables are put
Lerok [7]
Well, that would be 4 tables to fit 20 people but would not be enough for 2 more people so I would say 5 tables total.

-Hope this helps.
6 0
3 years ago
What is the value of x?
nexus9112 [7]

Answer:

x = 54

Step-by-step explanation:

The two angles are across a vertex and are therefore equal. Set the two angles equal and solve for x:

2x+2 = 3x - 52

     2 = x - 52

    54 = x

8 0
3 years ago
<img src="https://tex.z-dn.net/?f=5x%20%7B%7D%5E%7B2%7D%20%20%2B%202x%20-%203%20-%20px%20-%20p" id="TexFormula1" title="5x {}^{2
Jlenok [28]

Answer:

5x² + 2x - 3 - px - p

= 5x² + 5x - 3x - 3 - p(x + 1)

= 5x(x + 1) - 3(x + 1) - p(x + 1)

= (x + 1)(5x - 3 - p)

5 0
2 years ago
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