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3 years ago

Please help me. I already have the systems of linear equations which is y=87x+2129

Mathematics

2 answers:

Gnesinka [82]3 years ago

4 0

Answer:

Step-by-step explanation:

Your answer for x = 25.35 is correct.

Since the night must be an integer, you need to take 26 as your final answer. b) for y = 1500, you solve for x to consider which one is better.

for plan A, y = 87 x + 2129, you have to pay $2129 before starting the trip, hence $1500 is NOT enough to pay.

for plan B, y = 171x and y = 1500, hence x = 8.77. So, with $1500 you can travel for 8 nights.

goblinko [34]3 years ago

3 0

Step-by-step explanation:

that's it hope u understood

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Graph f(x) =-2x^+16x-30 by factoring to find the solutions, then find the coordinates of the vertex, and the axis of symmetry. I

fredd [130]

Answer:

Observe attached image

Function zeros:

(3, 0), (5, 0)

Vertex:

(4, 2)

Axis of symmetry:

 $x =4$ 

Step-by-step explanation:

First factorize the function

$f (x) = -2x ^ 2 + 16x-30$

Take -2 as a common factor.

$-2(x ^ 2 -8x +15)$

Now factor the expression $x ^ 2 -8x +15$

You must find two numbers that when you add them, obtain the result -8 and multiplying those numbers results in 15.

These numbers are -5 and -3

Then we can factor the expression in the following way:

$f (x) = -2(x-5)(x-3)$

The quadratic function cuts the x-axis at x = 3 and at x = 5.

Now we find the coordinates of the vertex.

For a function of the form $ax ^ 2 + bx + c$ the x coordinate of its vertex is:

$x = \frac{-b}{2a}$

In the function $f (x) = -2x ^ 2 + 16x-30$

$a = -2\\b = 16\\c = 30$

Then the vertice is:

$x = \frac{-16}{2(-2)}\\\\x = 4$

The y coordinate of the symmetry axis is

$y = f (4) = -2 (4) ^ 2 +16 (4) -30\\\\y = 2$

The axis of symmetry is a vertical line that cuts the parabola in two equal halves. This axis of symmetry always passes through the vertex.

Then the axis of symmetry is the line

$x = 4$

The solutions and the vertice written as ordered pairs are:

Function zeros:

(3, 0), (5, 0)

Vertex:

(4, 2)

6 0

3 years ago

Please answer tomorrow is my exam please

Illusion [34]

Answer:

i dont know sorry.

Step-by-step explanation:

Do it yourself ;)

4 0

3 years ago

Is -0.5 an integer? Explain.

Drupady [299]

Yes, -0.5 is an integer because it is a negative number. Any number that is positive or negative is an integer.

4 0

3 years ago

Read 2 more answers

An honest coin is flipped 4 times. Given that the coin landed heads up more than two, what is the probability that it landed hea

arsen [322]

Answer:

probability of getting four head consecutively is 0.2

Step-by-step explanation:

in an experiment coin is flipped 4 times.

given, coin landed heads up more than two times

outcomes of coin landed heads up more than two times =

SAMPLE SPACE : [ {HHHT}{HHTH}{HTHH}{THHH}{HHHH} ]

chance of getting 4 heads = 1 (HHHH)

Probability = $\dfrac{1}{5}$

hence the probability of getting four head consecutively is 0.2

5 0

3 years ago

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If angles R and S are complementary, find angle S

Juli2301 [7.4K]

Answer:

75/7 degrees or 10 and 5/7

Step-by-step explanation:

Complementary angles add up to 90 degrees. So, (6x-47) + (x+4) = 90

Combine like terms

7x-43=90

Subtract 43 from both sides

7x=47

x = 6 and 5/7

Plug this into the equation for the measure of angle s

6 and 5/7 + 4 = 10 and 5/7

3 0

3 years ago