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marta [7]
3 years ago
10

Y+2x=7 and x=3+y Solve each system of equations using substitution

Mathematics
1 answer:
Alex3 years ago
4 0

Answer:

y+2x=7 (1)

x=3+y (2)

Replace x = 3+y (2) into (1) => y+2(3+y) = 7

=> y = 1/3 and x = 3+1/3 =10/3

Step-by-step explanation:

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50.For the direct variation such that when y = 2 then x = 3, find the constant of variation ( k ) and then find the value of y w
tamaranim1 [39]

Step-by-step explanation:

Since it's a direct variation

y = kx

where k is the constant of proportionality

To find the value of y when x = –0.5 we must first find the relationship between the variables

When

x = 3

y = 2

2 = 3k

Divide both sides by 3

k =  \frac{3}{2}

So the formula for the variation is

<h3>y =  \frac{3}{2} x</h3>

When x = - 0.5 or - 1/2

y =  \frac{3}{2} ( -  \frac{1}{2} )

We have the final answer as

<h2>y =  -  \frac{3}{4}</h2>

Hope this helps you

3 0
3 years ago
Which whole numbers does the square root of 73 falls in between?
Juli2301 [7.4K]

Answer:

8 and 9

Step-by-step explanation:

\sqrt{64}  <  \sqrt{73}  <  \sqrt{81}

That equals

8 <  \sqrt{73}  < 9

3 0
3 years ago
The sum of two numbers is 46 the difference is 16
Sindrei [870]
31 and 15

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Step-by-step explanation:

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