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Irina18 [472]
3 years ago
12

Help me solve this proportionalequation

%20%5Cfrac%7B7%7D%7B3%7D%20" id="TexFormula1" title=" \frac{9 + x}{9} = \frac{7}{3} " alt=" \frac{9 + x}{9} = \frac{7}{3} " align="absmiddle" class="latex-formula">
​
Mathematics
1 answer:
Blizzard [7]3 years ago
5 0
Cross multiplication, 3(9+x) = 63
27+3x = 63
3x = 63-27 = 36
x=36/3=12
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35% of what number is 91
Aleonysh [2.5K]

Answer:

3185

Step-by-step explanation:

4 0
3 years ago
$18, P = $200, r = ?, t = 1.5 years. Find the annual interest rate.
faust18 [17]

                                                  Question 1)

Given

Interest I = $18

Principle P = $200

t = 1.5 years

To determine

Interest rate r = ?

Using the formula

P = Irt

r=\frac{I}{Pt}

susbtituting I = 18, t = 1.5 and P = 200

r=\frac{18}{\left(200\times 1.5\right)}

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or

r = 6%       ∵ 0.06 × 100 = 6%

Therefore, we conclude that the interest rate required to  accumulate simple interest of $18.00  from a principal of $200 over 1.5 years is 6% per year.

                                                    Question 2)

Given

Interest I = $60

Principle P = $750

Interest rate = 4% = 0.04

To determine

Time period t = ?

Using the formula to calculate the time period

P = Irt

t\:=\:\frac{P}{Ir}

t=\frac{60}{\left(750\times 0.04\right)}

t = 2 years

Therefore, the time required to  accumulate simple interest of $ 60.00

from a principal of $ 750 at an interest rate of 4% per year  is 2 years.

7 0
3 years ago
The photography club has 36 memebers, 16 girls and 20 boys. what is the ratio of girls to boys in the photography club?
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Answer:

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8 0
2 years ago
Read 2 more answers
find the magnitude of two forces f1 and f2 such that at right-angle to each other, their resultant is √13N. Also, if the two for
serious [3.7K]
This can be solved a couple of ways. One way is to use the Pythagorean theorem to write equations for the magnitude from the components of the forces. That is what was done in the graph here.

Another way is to use the Law of Cosines, which lets you make direct use of the angle between the vectors.
.. 13 = a^2 +b^2 -2ab*cos(90°)
.. 19 = a^2 +b^2 -2ab*cos(120°)
Subtracting the first equation from the second, we have
.. 6 = -2ab*cos(120°)
.. ab = 6

Substituting this into the first equation, we have
.. 13 = a^2 +(6/a)^2
.. a^4 -13a^2 +36 = 0
.. (a^2 -9)(a^2 -4) = 0
.. a = ±3 or ±2

The magnitudes of the two forces are 2N and 3N, in no particular order.

5 0
3 years ago
Graph f(x) = |x - 6| -4
LekaFEV [45]

Answer:

Step-by-step explanation:

Graph the parent function y = |x|.  This graph has a v shape with vertex at (0, 0) and opens up.

Now translate the entire graph 6 units to the right.  The vertex will now be at (6, 0).

Finally, translate this most recent graph 4 units down.  The vertex will now be at (6, -4).

4 0
2 years ago
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