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3 years ago

Select all the roots of the following equation.

Mathematics

2 answers:

leonid [27]3 years ago

7 0

Answer:

Postive 5 and negative 9.

Step-by-step explanation:

So remember, all we have to do is set each of the parethese to zero and solve. It should look like this:

x-5=0 and x+9=0

For the first equation we have made, jsut add 5 to both sides so x is alone. This will get you:

x=5

So the first answer for x is 5.

Now lets solve our second equation and find the second answer for x.

So all we have to do for this one is subtract 9 from both sides. This should get you:

x=-9

So now we know that our two answers for x is 5 and -9.

These two answers seem to be on your list as #2 answer and #3 answer.

strojnjashka [21]3 years ago

6 0

Answer:

5, -9

Step-by-step explanation:

(x - 5)(x + 9) = 0 These are factors, to get the roots, just set each one equal to zero

x - 5 = 0

x = 5

x + 9 = 0

x = -9

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Level K

liq [111]

Answer: $(y-1)=9(x-6)$

Step-by-step explanation:

If a line is passing through the point (a,b) and has a slope m, then the equation of the line in point-slope form is given by :-

$(y-b)=m(x-a)$

Given: A line that includes the point (6, 1) has a slope of 9.

The equation of line in point-slope form: $(y-1)=9(x-6)$

Hence, the required equation in point slope form: $(y-1)=9(x-6)$

6 0

3 years ago

NEED SOLVING ASAP. The one that is highlighted is right I just need what the expression simplifies to.

Minchanka [31]

When you divide exponents you subtract the bottom one from the top one. The correct answer would be the first choice.

The expression should simplify to: X^4

8 0

3 years ago

How do I calculate this? Is there a formula?

alex41 [277]

Answer:

Height of cables = 23.75 meters

Step-by-step explanation:

We are given that the road is suspended from twin towers whose cables are parabolic in shape.

For this situation, imagine a graph where the x-axis represent the road surface and the point (0,0) represents the point that is on the road surface midway between the two towers.

Then draw a parabola having vertex at (0,0) and curving upwards on either side of the vertex at a distance of $x = 600$ or $x = -600$ , and y at 95.

We know that the equation of a parabola is in the form $y=ax^2$ and here it passes through the point $(600, 95)$ .

$y=ax^2$

$95=a \times 600^2$

$a=\frac{95}{360000}$

$a=\frac{19}{72000}$

So new equation for parabola would be $y=\frac{19x^2}{72000}$ .

Now we have to find the height $(y)$ of the cable when $x= 300$ .

$y=\frac{19 (300)^2}{72000}$

y = 23.75 meters

8 0

4 years ago

Read 2 more answers

I will give thanks and five stars to the person that helps me.

Rzqust [24]

Answer:

x > 75

Step-by-step explanation:

x/5 + 6 > 21

Subtract 6 from both sides.

x/5 > 15

Multiply both sides by 5.

x > 75

Answer: x > 75

3 0

3 years ago

Daniel at 5 servings of fruit yesterday. If each serving was 2/5 cup, how many cups of fruit did Daniel eat?

Elodia [21]

Daniel ate 2 cups of fruit. 5 x 2/5 = 2. Hope I could help! :D

3 0

3 years ago

Read 2 more answers