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2 years ago

Help please !!!!!!!!!!!!!!

Mathematics

1 answer:

yKpoI14uk [10]2 years ago

5 0

1) The triangles are similar, so correponding sides have the same ratio.
.. 3x/20 = (4x +2)/28
.. 3x/5 = (4x +2)/7 . . . . . . . multiply by 4
.. 7*3x = 5(4x +2) . . . . . . . multiply by 35 = 5*7
.. 21x = 20x +10 . . . . . . . . eliminate parentheses
.. x = 10 . . . . . . . . . . . . . . . subtract 20x

2) The triangles are similar, so corresponding measures have the same ratio.
.. x/42 = 10/15
.. x = 42*(10/15) = 28

3) The third angle of triangle ABC is 180° -20° -80° = 80°. Then two of the angles of ABC match those of JKL. The 3rd answer selection is appropriate.

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Answer:

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Step-by-step explanation:

Now, to find the solution.

According to question:

The number of nickels = $x$ .

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Thus,

$y=x+3$ .....(1)

Now, to get the solution:

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Substituting the equation (1):

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Subtracting both sides by 3 we get:

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Now, substituting the value of $x$ in equation (1):

$y=x+3\\\\y=6+3\\\\y=9.$

The number of quarters = 9.

Thus, there are 6 coins in nickels and 9 coins in quarters.

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2 years ago

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Answer:

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Step-by-step explanation:

The principal value of the arctangent of 0.7002 is 35°. The tangent function is periodic with a period of 180°, so the general solution is ...

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Values from the given list include ...

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Additional comment

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1 year ago

If f(x)=2(3x-5) when f(x) =74,what is the value of x??

Zinaida [17]

Answer:

x = 14

Step-by-step explanation:

given f(x) = 2(3x - 5) and f(x) = 74 , then equating gives

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1 year ago

Read 2 more answers