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solniwko [45]
3 years ago
10

50 POINTS

Mathematics
2 answers:
egoroff_w [7]3 years ago
6 0

Answer:

D

Step-by-step explanation:

Factor x^2+2x-8

(x-2)(x+4) = 0

Solve for x

x = 2

x = -4

Paul [167]3 years ago
6 0

Given:

f(x)=\frac{x+2}{x^2+2x-8}

find the denominator:

x^2+2x-8

(x+4)(x-2) = y

Find the x value:

x-2=0\\x=2

x+4=0\\x=-4

Your answer would be D:

x = -4, 2

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meriva

Answer: The square root of 18 divided by square root of 50 is 5 square root of x divided by 5.

3 0
3 years ago
You need to reverse the symbol to solve which inequality?
Marina86 [1]

When you multiply/divide by a negative number while solving the inequality, you reverse the symbol.

A.)  4(5 - y) ≥ 80       To solve this, isolate/get the variable "y" by itself in the inequality. Divide 4 on both sides

\frac{4(5-y)}{4} \geq \frac{80}{4}

5 - y ≥ 20       Subtract 5 on both sides

5 - 5 - y ≥ 20 - 5

-y ≥ 15     Divide -1 on both sides to get "y" by itself

\frac{-y}{-1} \geq \frac{15}{-1}       Because you are dividing by a negative number, you need to reverse the sign

y ≤ -15

B.) 2(y - 3) ≥ 8      Isolate "y", divide 2 on both sides

y - 3 ≥ 4      Add 3 on both sides to get "y" by itself

y ≥ 7

C.) 3y - 4 > 1       Add 4 on both sides

3y > 1       Divide 3 on both sides to get "y" by itself

y>\frac{1}{3}

D.) -\frac{3}{4} +6y > \frac{1}{4}       Isolate "y", add 3/4 on both sides

6y > 1     Divide 6 on both sides to get "y" by itseld

y>\frac{1}{6}

7 0
3 years ago
What is the area of this polygon?
Wittaler [7]

Answer:

42 i think

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
The graph of <img src="https://tex.z-dn.net/?f=y%20%3D%20ax%5E2%20%2B%20bx%20%2B%20c" id="TexFormula1" title="y = ax^2 + bx + c"
Reptile [31]

Answer:

(-b/2a, b^2/(4*a) - b^2/2a + c)

Step-by-step explanation:

For a general parabola:

y = a*x^2 + b*x + c

We can write the vertex as:

(h, k)

The x-value of the vertex is the value of the axis of symmetry.

Then we have:

h = x = -b/2a

Now we need to find the y-value of the vertex.

To do that, we just replace the variable "x" by the x-value of the vertex in our equation, so we get:

k = y = a*(-b/2a)^2 + b*(-b/2a) + c

k = b^2/(4*a) - b^2/2a + c

Then the coordinates of the vertex are:

(h, k) = (-b/2a, b^2/(4*a) - b^2/2a + c)

8 0
3 years ago
At Hoffman's Bike Rentals, it costs $33 to rent a bike for 8 hours. How many hours of bike use does a customer get per dollar?
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0.24 repeating so rounding it to the nearest hundredth would make it stay 0.24<span />
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