3 years ago

What ratios are equivalent to 1:7

Mathematics

2 answers:

Stels [109]3 years ago

8 0

2:14 I think this is a ratio

lesya692 [45]3 years ago

3 0

2:14 3:21 etc. all you have to do is for every 1 you add to the front number add 7 more to the second number

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The linear function graphed below represents the value of a comic book since Lucy purchased it. What was the value of the comic

zhuklara [117]

Answer:

C. $25

Step-by-step explanation:

We will find,

The slope of the function using $\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ .

Taking the points (1,40) and (2,55).

Slope = $\frac{55-40}{2-1}$

i.e. Slope = $\frac{15}{1}$

i.e. Slope = 15

Substituting the slope and point (1,40) in the equation $y=mx+b$ ,

We have, $40=15\times 1+b$

i.e. $b=40-15$

i.e. b= 25

Thus, the equation of the linear function is $y=15x+25$ .

This linear function represents the cost of the comic book since Lucy purchased it, where x= years.

So, the initial value of the comic book is when x= 0.

So, $y=15\times 0+25$ i.e. y= 25

Hence, the cost of the book when Lucy purchased it was $25.

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What os the value of x in the equation 3x- 1/9y=18, when y =27

ollegr [7]

3x- 1/9 y=18
3x- 1/9(27) =18
3x - 3 = 18
3x = 21
x = 7

hope it helps

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Sometimes it’s alright . It’s awful when some one robs you of points by writing a b.s answer

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