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3 years ago

The x-intercepts of a parabola are 5 and -7. What is the equation of the axis of symmetry?

Mathematics

1 answer:

zloy xaker [14]3 years ago

4 0

X=-1
The axis of symmetry will be directly in the middle of the intercepts.

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Determine the measure of an angle (in radians) that cuts off an arc length of 6.4 inches in a circle with a 6.4 inch radius.

serg [7]

1 radian
because s= r × angle measurement in radian
we have s= arc , r = radian so we got the value

5 0

3 years ago

Which expressions are equivalent to Negative 9 (two-thirds x + 1)? Check all that apply.

Sav [38]

Answer:

$-9(\frac{2}{3}x) + 9(1)\\ \\-6x + 9$

Explanation:

Before we begin, remember the following rules:

1- Distribution property:

$a(b+c) = ab+ac$

2- Simplification of fractions:

$\frac{xy}{yz}=\frac{x}{z}$

3- Signs in multiplication:

+ve * +ve = +ve

-ve * -ve = +ve

+ve * -ve = -ve

Now, for the given problem, we have:

$9 (\frac{2}{3}x + 1)$

Starting with the distributive property:

$-9 (\frac{2}{3}x +1) = -9(\frac{2}{3}x) - (-9)(1) = -9(\frac{2}{3}x) + 9(1)$

..................>This corresponds to option 1

Now, we simplify the output from the above step:

$-9(\frac{2}{3}x) + 9 = \frac{-9*2}{3}x + 9 = -6x+9$

................> This corresponds to option 5

Hope this helps :)

4 0

3 years ago

Read 2 more answers

0.004 - (-2.51) + 0.027= Please show me how to get the answer

nekit [7.7K]

The answer is 2.54 because if u subtract those two numbers u will get 2.51 and then u add the last number and u get 2.54 as your final answer

4 0

3 years ago

If the value of a is negative in f(x)=ax^(2), what does the graph look like?

garik1379 [7]

Answer:

A. a parabola that opens down.

Step-by-step explanation:

First we can eliminate two answers, b and d, since parabalas that open left or right use the y variable.

Now the equation of a standard parabola is x². This means that there are no negative y values, and therefore it cannot open down, it is up.

With a NEGATIVE coefficient, the graph is flipped over the x axis, therefore making it open down.

Graphical proof is attached for further understanding, positive a is in red, negative a is in blue.

7 0

2 years ago

Read 2 more answers

The theatre has 4 chairs in a row. there are 5 rows. how many chairs are there in total.

Tanya [424]

Answer:

Step-by-step explanation:

1111 <--- 1st row

1111 <---- 2nd row

1111 <--- 3rd row

1111 <----- 4th row

1111 <----- 5th row

use multiplication

4 0

3 years ago