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tester [92]
3 years ago
5

Geometry Help Please?

Mathematics
1 answer:
Jlenok [28]3 years ago
7 0
Divide the two known corresponding sides: JK/AB = 18/12 = 3/2 = 1.5
So the sides of triangle JKL are 1.5 (one and a half) times bigger than the corresponding sides for triangle ABC

1.5 is the linear scale factor

This extends to the perimeter as well: 
perimeter of JKL = 1.5*(perimeter of ABC)
perimeter of JKL = 1.5*28
perimeter of JKL = 42 feet

It turns out that since the linear scale factor is 1.5, this means the area scale factor is (1.5)^2 = 2.25
The new area is found by multiplying the old area by 2.25

area of JKL = 2.25*(area of ABC)
area of JKL = 2.25*18
area of JKL = 40.5

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

In summary:
Perimeter of JKL = 42 feet
Area of JKL = 40.5 square feet
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What transformation is made from f(x) → f(-x)?
sineoko [7]

Answer:

A) reflection across the y-axis

Step-by-step explanation:

If f(x)=f(-x), then this says that two y-coordinates are equal for opposite values of x.

Let (a,b) a point on f.

Then f(a)=b.

We also know that f(-a)=b and therefore (-a,b) is also a point on the graph.

If you graph [/tex](-a,b)[/tex] and (a,b) you will see they are symmetrical to each about the y-axis.

Example if given both f(x)=f(-x) and f(2)=3, then f(-2)=3. This means both (2,3) and (-2,3) are points on the graph.

Here is what those two points look like on a Cartesian Plane (please see graph in picture).

8 0
3 years ago
The least common multiple of two numbers is 40. The difference of the two numbers is 2.What is the value of the greater of the t
Natalka [10]
20=2*2*5   42=2*3*7 that is your awnser

6 0
2 years ago
Suppose the population standard deviation is σ = 5 , an SRS of n = 100 is obtained, and the confidence level is chosen to be 98%
beks73 [17]

Answer:

1.165.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.98}{2} = 0.01

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.01 = 0.99, so z = 2.33

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

In this problem, we have that:

\sigma = 5, n = 100. So

M = z*\frac{\sigma}{\sqrt{n}}

M = 2.33*\frac{5}{\sqrt{100}} = 1.165

So the correct answer is:

1.165.

6 0
3 years ago
I reealllyyyy need helpp isss quizz
vova2212 [387]

Answer:

6

Step-by-step explanation:

i cant see the number correctly but the number on the top of the 7 is the answer

4 0
3 years ago
Read 2 more answers
Jeff drove 249 laps around the racetrack is 9 miles long. how many miles did jeff drive
mr_godi [17]
Hey there Jnorman1287.

Answer:

Distance = 249 x 9
               = 2,241

Hope this helps :D

<em>~Natasha♥</em>
5 0
3 years ago
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