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uysha [10]
3 years ago
13

Y=7 x=2 what is the value of x when y=21

Mathematics
2 answers:
marshall27 [118]3 years ago
5 0
The value of x would 6. Y divided by x would get you 3.5, therefore 21 divides by 3.5 is 6.
Margaret [11]3 years ago
4 0
Answer:

<span>y=4.98</span>

Explanation:

First, find the constant of proportionality , k.

<span>y=kx</span>
<span>21=7k</span>
<span>k=3</span>

We now start over and solve for y using the new value of x and the obtained value of k.

<span>y=<span>(3)</span><span>(1.66)</span></span>
<span>y=<span>4.98</span></span>

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jok3333 [9.3K]
I’m pretty sure parallelograms are squares, rectangles and rhombuses. So you could take up the needed amount of space with a rectangles and rhombus. Sorry if this isn’t that much help.
7 0
3 years ago
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Is 2/5 greater than less than equal to 2/3 * please tell me how to do the work! And not just tell the answer bc this is a test!*
Likurg_2 [28]

Answer:

2/5 is less than 2/3

Step-by-step explanation:

bc  the bottom number is how many in total and in 2/3 the number on the top only needs 1 more to be a whole.

3 0
3 years ago
Pls help (50 points)
svetlana [45]

Answer:

4.5 inches

Step-by-step explanation:

We are given the formula:

V = \pi r^{2}h

Plug in the the radius (3) and volume (127.23):

127.23 = 3.14(3)^{2} h

Square the 3 :

127.23 = 3.14(9)h

Multiply the pi & volume:

127.23 = 28.26h

Divide both sides by 28.26:

127.23 ÷ 28.26 = 28.26h ÷ 28.26

h = 4.5021231...

I hope this helps!

6 0
3 years ago
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Two solutions of different concentrations of acid are mixed creating 40 mL of a solution that is 32% acid. One-quarter of the so
Georgia [21]
In order to construct this equation, we will use the variables:
V to represent mixture volume (40 ml)
C to represent mixture concentration (0.32)
v₁ to represent volume of first solution (40 / 4 = 10 ml)
c₁ to represent concentration of first solution (0.2)
v₂ to represent the volume of the second solution (40 * 3/4 = 30 ml)
c₂ to represent the concentration of the second solution 


We know that the total amount of substance, product of the volume and concentration, in the final solution is equal to the individual amounts in the two given solutions. Thus:
VC = v₁c₁ +  v₂c₂
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6 0
4 years ago
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What is the solution of the system of equations? -y+3x=6 y=-6x+12
irinina [24]

Answer:

x = 2

y = 0

Step-by-step explanation:

We can solve using substitution, substitute y in the first equation with the second equation:

-(-6x + 12) + 3x = 6

Distribute the negative sign:

6x - 12 + 3x = 6

Combine like terms:

9x - 12 = 6

Isolate the variable and solve for x by adding 12 in both sides:

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Substitute 2 with x in any equation to find the value of y:

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Our answer would be x = 2 and y = 0

8 0
3 years ago
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