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IRISSAK [1]
3 years ago
15

When x is 2.25, y is 6.75 y varies directly with x write the direct variation equation in the form y = kx. direct variation equa

tion find y when x is 4.2. when x = 4.2, y =?
Mathematics
1 answer:
sweet [91]3 years ago
3 0
Well 
when x=2.25 y=6.75 
y=kx 
that means if you put x= 2.25 you will get y=6.75
in this relation (y=kx)

6.75= 2.25k

k=6.75/2.25 =3 

the rel. is y=3x
whe x=4.2 
y= 3*4.2 =12.6

#

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(b)Therefore, the length of the fence is  97\frac{1}{2}$ feet

Step-by-step explanation:

The diagram of the yard is attached below.

(a)I have labeled the missing dimensions of the yard as x and y.

Therefore:

y+8\frac{1}{4}=17 \frac{1}{4}\\y=17 \frac{1}{4}-8\frac{1}{4}\\y=9$ feet

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The missing measurements are 9 feet and 16\frac{1}{4}$ feet.

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