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larisa86 [58]
3 years ago
14

A.100 B.80 C.50 D.20

Mathematics
1 answer:
katrin2010 [14]3 years ago
3 0

Answer:

C. 50

Step-by-step explanation:

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In the following isosceles trapezoid, find the value of x.
yulyashka [42]

Answer:

24

Step-by-step explanation:

22 - 8 = 14

14/2 = 7

Pythagoras theorem

25 squared -7 squared = 576

square root of 576 = 24

5 0
3 years ago
What is the equation when y=5x+4 is reflected over the x-axis, y-axis & y=x?
tigry1 [53]

Answer:

A) y=-5x-4

B) y=-5x+4

C) y=\frac{x-4}{5}

Step-by-step explanation:

So we have the equation:

y=5x+4

Let's write this in function notation. Thus:

y=f(x)=5x+4

A)

To flip a function over the x-axis, multiply the function by -1. Thus:

f(x)=5x+4\\-(f(x))=-(5x+4)

Simplify:

-f(x)=-5x-4

B) To flip a function over the y-axis, change the variable x to -x. Thus:

f(x)=5x+4\\f(-x)=5(-x)+4

Simplify:

f(-x)=-5x+4

C) A reflection over the line y=x is synonymous with finding the inverse of the function.

To find the inverse, switch x and f(x) and solve for f(x):

f(x)=5x+4

Switch:

x=5f^{-1}(x)+4

Subtract 4 from both sides:

x-4=5f^{-1}(x)

Divide both sides by 5:

f^{-1}(x)=\frac{x-4}{5}

And we're done :)

7 0
3 years ago
The length of 9 ants measure 3.51 inches. What is the length of 25 ants measured in inches if each ant is 1 cementer long?
valentina_108 [34]

Answer:

if 9 ants=3.51inches

25 ants =x

therefore by cross multiplication

x= 25*3.51 /9 =9.8 inches

answer:B

8 0
3 years ago
Read 2 more answers
Milo is a running back on his middle school football team. On his first running play he netted -8 yards, and on his second runni
lidiya [134]
To find average, add up the values given and then divide that number by the amount of values that you added to make the larger number.
For example:
If he ran -8 yards first and -6 yards second and they are asking you to find the average, add -8 and -6. You get -14. If you then divide by 2 because you added 2 numbers together, you end up with -7.

Hope this helps!
6 0
3 years ago
PLEASE HELP ME!!!!!!!
Shalnov [3]

Answer:

i6 sqrt 5

Step-by-step explanation:

It cannot be 12i sqrt 5 as this is 26.8326....

it cannot be  18i sqrt 5 as this is 40.249...

It cannot be 8i sqrt 5 as this is 17.888....

It cnanot be 8i sq rt 10 as this is 25.298....

i6 sq rt 5 = sqrt -180

6 0
2 years ago
Read 2 more answers
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