All categories

3 years ago

X^2 -9 = -15 i got decimals please help me

2 answers:

7 0

Equation: x² - 9 = -15

Step-by-step solution:

• Move -9 to right side
-> x² = -15 + 9

• Solve
-> x² = -6

• Root of both sides
-> x = √-6
This is wrong because √-1 = imaginary number and it doesn't look like you're dealing with imaginary numbers so check the equation again

olga nikolaevna [1]3 years ago

4 0

Answer:

sqrt 24

Step-by-step explanation:

x^2-9=-15

x^2-9+9=-15+9

x^2=24

x=sqrt 24

You might be interested in

The Alan Company bought 80 tickets for a jazz company. After giving away 20 tickets to customers, the company sold the rest to t

aleksandrvk [35]

Each employ paid 166.67 for each ticket

4 0

2 years ago

Help me with this Please Help

Arte-miy333 [17]

Answer:
80mm

Step by step explanation:

To convert centimeters to millimeters, all you have to do is multiply the number of centimeters by 10.

3 0

1 year ago

Read 2 more answers

The curves r1(t) = 2t, t2, t4 and r2(t) = sin t, sin 5t, 2t intersect at the origin. Find their angle of intersection, θ, correc

masya89 [10]

Answer:

Therefore the angle of intersection is $\theta =79.48^\circ$

Step-by-step explanation:

Angle at the intersection point of two carve is the angle of the tangents at that point.

Given,

$r_1(t)=(2t,t^2,t^4)$

and $r_2(t)=(sin t , sin5t, 2t)$

To find the tangent of a carve , we have to differentiate the carve.

$r'_1(t)=(2,2t,4t^3)$

The tangent at (0,0,0) is [ since the intersection point is (0,0,0)]

$r'_1(0)=(2,0,0)$ [ putting t= 0]

$|r'_1(0)|=\sqrt{2^2+0^2+0^2} =2$

Again,

$r'_2(t)=(cos t ,5 cos5t, 2)$

The tangent at (0,0,0) is

$r'_2(0)=(1 ,5, 2)$ [ putting t= 0]

$|r'_1(0)|=\sqrt{1^2+5^2+2^2} =\sqrt{30}$

If θ is angle between tangent, then

$cos \theta =\frac{r'_1(0).r'_2(0)}{|r'_1(0)|.|r'_2(0)|}$

$\Rightarrow cos \theta =\frac{(2,0,0).(1,5,2)}{2.\sqrt{30} }$

$\Rightarrow cos \theta =\frac{2}{2\sqrt{30} }$

$\Rightarrow cos \theta =\frac{1}{\sqrt{30} }$

$\Rightarrow \theta =cos^{-1}\frac{1}{\sqrt{30} }$

$\Rightarrow \theta =79.48^\circ$

Therefore the angle of intersection is $\theta =79.48^\circ$ .

8 0

2 years ago

What is the least common multiple of 19 and 14?

vodomira [7]

The lest common multiple of 19 and 14 is 266

hope this helped

8 0

3 years ago

Does this table represent a function? Why or why not? Answers above

Mashutka [201]

Answer:

No, because a x-value repeats.

Step-by-step explanation:

A function has x-values that correspond to exactly one y-value. In the given table, the number '5' appears twice as an x-value. This means that the relation is not a function, "because one x-value corresponds to two different y-values."

7 0

2 years ago

Read 2 more answers