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3 years ago

Are these two triangles similar?

Mathematics

2 answers:

mixas84 [53]3 years ago

7 0

Answer:

Step-by-step explanation:

3.6 + 3.6 is not 9 & 2.84 + 2.84 is not 7.1

Anastasy [175]3 years ago

4 0

Answer:

No I believe.

Step-by-step explanation:

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Two-fifths of the students in your class are in the and. Of these, one-fourth play saxophone. What fraction of the class plays s

NNADVOKAT [17]

(3/20) of the class play saxophone.

8 0

3 years ago

Solve the equation. 25=9x+4-6x

raketka [301]

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{x = 7}}}}}$

Step-by-step explanation:

$\star{ \tt{ \: 25 = 9x + 4 - 6x}}$

$\sf{Step \: 1 \: }$ : Collect like terms

Like terms are those which have same base

$\longmapsto{ \sf{25 = 3x + 4}}$

$\tt{Step \: 2 \: }$ : Swap the sides of the equation

$\longmapsto{ \sf{3x + 4 = 25}}$

$\tt{Step \: 3 \: }$ : Move 4 to right hand side and change it's sign

$\longmapsto{ \sf{3x = 25 - 4}}$

$\tt{Step \: 4}$ : Subtract 4 from 25

$\longmapsto{ \sf{3x = 21}}$

$\tt{Step \: 5}$ : Divide both sides by 3

$\longmapsto{ \sf{ \frac{3x}{3} = \frac{21}{3}}}$

$\tt{Step \: 6}$ : Calculate

$\longmapsto{ \sf{x = 7}}$

The value of x is 7

Hope I helped!

Best regards! :D

~TheAnimeGirl

5 0

3 years ago

Read 2 more answers

A sample of 20 pages was taken from a Yellow Pages directory. On each page, the mean area devoted to display ads was measured in

Snezhnost [94]

The 95 percent confidence interval for the mean is (266.76,426.24).

A confidence interval is how much uncertainty there is with any particular statistic. Confidence intervals are often used with a margin of error. It tells you how confident you can be that the results from a poll or survey reflect what you would expect to find if it were possible to survey the entire population. Confidence intervals are intrinsically connected to confidence levels.

The formula of Confidence Interval = Mean ± $t\frac{Standard Deviation}{\sqrt{number of observations} }$

where t is a constant

Given:

Mean = 346.5

Standard Deviation = 170.378

t-critical value for 95% Confidence interval with degrees of freedom(df)=n-1= 19 is 2.093

∴ Substituting values in formula we get

E = $2.093 X170.378/\sqrt{20}$ = 2.0931.96 x 38.0976=79.74

95% Confidence interval : (346.5-79.74,346.5+79.74)

95% Confidence interval : (266.76,426.24)

Learn more about confidence intervals here :

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#SPJ4

4 0

2 years ago

10.

Elina [12.6K]

Answer:

Answer:

C. The balloon starts at a height of 500 ft and rises at a rate of 150 ft.

Step-by-step explanation:

We have been given a graph which represents the height of the balloon over time.

We can see from our graph that y-intercept, which represents the height of the balloon (in thousand feet) at time equals zero, is 0.5. To find the correct y-intercept we will multiply 0.5 by 1000 as height of the balloon is given in thousand feet.

Therefore, y-intercept represents that the balloon starts at a height of 500 feet.

Now let us find slope of our given line using slope formula.

is vertical change or rise.

is horizontal change or run.

Upon substituting given values in above formula we will get,

Now let us multiply 0.15 by 1000 as height of balloon is given in thousand feet.

Therefore, slope of our line is 150 which means that height of balloon is increasing 150 feet per second or balloon is rising at a rate of 150 feet per second.

Upon looking at our given options we can see that option C is the correct choice.

Step-by-step explanation:

The slope is (change in y)/(change in x). Taking (0, 0.5) and (10, 2) since the x axis is horizontal and the y axis vertical, we get the slope to be (2-0.5)/(10-0)=

1.5/10=3/20=0.15. Since it's based off of 1000 feet, we multiply 0.15 by 1000 to get 150 as the rate of change for every x value. In addition, since we start at 0.5, 1000*0.5=500 and we therefore start at 500 ft. Using the information we have, we therefore have C as our answer

8 0

3 years ago

Write an equation in slope-intercept form of the line with slope m = (–1/2) and containing the point (4, 6).

bonufazy [111]

Answer: y = $\frac{-x}{2}$ + 8

Step-by-step explanation:

6 0

4 years ago