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Verizon [17]
2 years ago
10

If 3x + 7y = 47, AND 2x - y = 3 What is the value x?

Mathematics
1 answer:
elixir [45]2 years ago
4 0
X=4
y=5
work shown below

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The variable z is directly proportional to x, and inversely proportional to y. When x is 4 and y is 13, z has the value 1.230769
Talja [164]

Answer:

Step-by-step explanation:

1.2307692307692.

The first step is to find the proportionality constant.

The formula is

z = kx/y

1.2307692307692 = k * 4/13          Multiply both sides by 13

1.2307692307692 * 13 = 4k

16 = 4*k                                            Divide by 4

k = 16/4

k = 4

=================================

z = k*x/y

x = 9

y = 20

k = 4

z = 4 *9/20

z = 36/20

z = 1.8

7 0
3 years ago
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Which equation represents a circle with a center located at (-2, 2) and a circumfrence of 16 pi
PtichkaEL [24]
No me han dado un paso a ver a la policía y ha dicho la que han dado cuenta que ha sido un policía y ha
3 0
2 years ago
Simplify 3 - (4x - 5) + 6.
Talja [164]
<span>3 - (4x - 5) + 6  multiply -1 across 4x-5 to clear the preceding negative

3 - 4x + 5 + 6   combine like terms

-4x + 14</span>
6 0
3 years ago
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4. (03.05)
Snowcat [4.5K]

Answer:

B. domain is all integers 0 through 9

Step-by-step explanation:

Domain values area usually plotted along the horizontal axis. In this case, the number of days is the domain of the of the function.

The domain of the function that is plotted on the graph ranges from 0, 1, 2 to 9.

1, 2, 3 to 9 are all integers. Therefore, we can conclude that the "domain is all integers 0 through 9."

5 0
3 years ago
A sphere and cone have the same volume. Calculate the height, h, of the cone as a proportion of the radius, r.
Ugo [173]
I hope this helps you



Volume of Sphere=4/3.pi.r^3


Volume of Cone=1/3.pi.r^2.h



4/3.pi.r^3=1/3.pi.r^2.h


4.r=h
8 0
3 years ago
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