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3 years ago

Do these ratios form a proportion?

Mathematics

2 answers:

Kipish [7]3 years ago

8 0

Answer:

NO, i don't think

Step-by-step explanation:

cause

$\frac{48c}{6b}$ = $\frac{25c}{4b}$

8= 6.25

fredd [130]3 years ago

4 0

Yes yes yes yes yes yes

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If the units for x are years, and x = 5 represents the year 2015, what is the y-value for 2010?

Darya [45]

Given:

The given graph passes through the points (-3,4) and (3,2)

The x - axis represents the years. The value x = 5, year 2015.

We need to determine the y - value for 2010.

Slope:

The slope of the line can be determined using the formula,

$m=\frac{y_2-y_1}{x_2-x_1}$

Substituting the points (-3,2) and (3,2), we get;

$m=\frac{2-4}{3+3}$

$m=\frac{-1}{3}$

Thus, the slope of the line is $m=\frac{-1}{3}$

y - intercept:

The y - intercept in the graph is the point in the line that crosses the y - axis.

Thus, from the graph, it is obvious that the y - intercept is b = 3.

Equation of the line:

The equation of the line can be determined using the formula,

$y=mx+b$

Substituting the values, we have;

$y=-\frac{1}{3}x+3$

Thus, the equation of the line is $y=-\frac{1}{3}x+3$

The y - value for 2010:

Since, it is given that x = 5 represents 2015 and 2010 is 5 years before 2010.

Hence, the value of x for 2010 is given by

$x=5-5=0$

Thus, x = 0 represents the year 2010.

To determine the y - value, let us substitute x = 0 in the equation $y=-\frac{1}{3}x+3$ , we have;

$y=-\frac{1}{3}(0)+3$

$y=3$

Thus, for 2010 the value of y is 3.

5 0

3 years ago

Raquel and Van live in two different cities. As part of a project, they each record the lowest prices for a gallon of gas at gas

mylen [45]

Based on the information given, the true statement true about their gas-price data is A. Raquel’s data are most likely closer to $3.42 than Van’s data are to $3.78.

<h3>Solution to the gas-price data.</h3>

It should be noted that a standard deviation simply measures how dispersed the data will be in relation to the mean.

From the complete question, the mean of Raquel's data is given as 3.42 while the standard deviation is given as 0.07. On the other hand, the mean of Van's data is given as 3.78 while the standard deviation is given as 0.23.

Therefore, it can be deduced that Raquel’s data are most likely closer to $3.42 than Van’s data are to $3.78.

Learn more about standard deviation on:

brainly.com/question/19243813

3 0

3 years ago

Read 2 more answers

Help me please

Arturiano [62]

X^2 - xy + xy - Y^2
=
X^2 - Y^2

4 0

3 years ago

these polygons are similar. find the similar ratio. any help ? please? ( also how do I ask a question ok here without typing 20

NNADVOKAT [17]

Answer: Choice B) 3/5

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

Explanation:

The smaller horizontal side is JM = 15
The larger horizontal side is NQ = 25

The ratio of these corresponding sides is:
small/large = 15/25 = (5*3)/(5*5) = 3/5

----------------

Alternatively,

The smaller vertical side is ML = 18
The larger vertical side is QP = 30

The ratio of these corresponding sides is:
small/large = 18/30 = (6*3)/(6*5) = 3/5

----------------

Either way, the answer is 3/5

4 0

3 years ago

Write the equation of the graph

lakkis [162]

Answer:

y = x -3

Step-by-step explanation:

From the graph we see the line goes from point (0, -3) to point ( 3, 0), so we can find the slope as m= rise ( go up 3) / run ( go to the right 3) = 3/ 3 = 1

From the graph we can also see the y-intercept ( where the line intersects the y axis is at b = -3

The general equation of the line is y= mx+ b

Our line's equation is y = x -3, because m=1 and b= -3

5 0

3 years ago