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3 years ago

Select the correct answer.

Mathematics

1 answer:

hammer [34]3 years ago

5 0

Answer:

(A)

Step-by-step explanation:

The domain of the function are the inputs, or x-values, of the function.

{(6,-8), (9,3), (-3,5), (1,-6), (5,7)}

The domain is: {-3, 1, 5, 6, 9}.

This eliminates B, C, and D, because their domains do not match the ones we have.

We need to check to see if it matches the range as well.

The range of the function are the inputs, or y-values of the function.

{(6,-8), (9,3), (-3,5), (1,-6), (5,7)}

The range is: {-8, -6, 3, 5, 7}

A matches this range too.

A is the best answer.

Brainilest is appreciated.

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HELP PLEASE!!! I need help with this question!

AlexFokin [52]

Answer:

$\large\boxed{PS=10\sqrt5}$

Step-by-step explanation:

ΔPQS, ΔRQP and ΔRPS are similar (AA). Therefore the sides are in proportion:

$\dfrac{QR}{RP}=\dfrac{RP}{RS}$

We have:

$QR=5,\ RS=20$

Substitute:

$\dfrac{5}{RP}=\dfrc{RP}{20}$ cross multiply

$RP^2=(5)(20)\\\\RP^2=100\to RP=\sqrt{100}\\\\RP=10$

Use the Pythagorean theorem:

$PS^2=PR^2+RS^2$

Substitute:

$PS^2=10^2+20^2\\\\PS^2=100+400\\\\PS^2=500\to PS=\sqrt{500}\\\\PS=\sqrt{100\cdot5}\\\\PS=\sqrt{100}\cdot\sqrt5\\\\PS=10\sqrt5$

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2 years ago

An employment agency specializing in temporary construction help pays heavy equipment operators $138 per day and general laborer

prisoha [69]

Answer:

L = 2,

O = 31

Step-by-step explanation:

First using the givens, write out some formulas.

Heavy equipment operators = O

General laborers = L

O + L = 33
138O + 87L = 4044

Now use substitution, it doesn't matter which one you substitute.

O = -L +33
138( -L + 33 ) + 87L = 4044

Distribute and solve for L.

-138L + 4554 + 87L = 4044
-138L - 87L = 4044 - 4554
-225L = -510
L = -510/-225
L = 2

L = 2, meaning number of laborers employed is 2.

Now plug 2 = L into one of the original equations.

O + L = 33
O + 2 = 33
O = 33 - 2
O = 31

O = 31, meaning number of heavy equip. operators employed is 31.

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3 years ago

Find the value of x. 133 6 135 137° 139°

saveliy_v [14]

The sum of the angles of 4-sided shapes is 360°

To find the missing angle, you can do this:

x + 92° + 47° + 82° = 360° Add 92, 47, and 82 together

x + 221° = 360° Subtract 221 on both sides to get "x" by itself

x + 221° - 221° = 360° - 221°

x = 139° Your answer is the 4th option

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3 years ago

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Change the equation from standard form into vertex form by completing the square.

Komok [63]

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3 years ago

Can somebody teach what quadratic function is?

morpeh [17]

A quadratic function is one of the form f(X)=ax^2+bx +c,where a,b and c are numbers with 'a' not equal to zero.
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All parabolas are symmetric with respect to a line called the axis of symmetry. A parabola intersects its axis of symmetry at a point called the vertex of the parabola.
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3 years ago