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Alexxx [7]
3 years ago
11

I am an ambitious and have 765/500 points and 5/5 brainliest answers but I cant level up. wHY?

Mathematics
2 answers:
maks197457 [2]3 years ago
6 0
You need to contact the app about that, try maybe their customer service or their email?
kondaur [170]3 years ago
6 0

ME TOO

i don't understand :(

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10 exponent negative 9 divided by 10 exponent negative 3
anygoal [31]
\frac{x^a}{x^b}=x^{a-b}  \\ x^{-a}= \frac{1}{x^a}  \\  \\  \\  \frac{10^{-9}}{10^{-3}} =10^{-9-(-3)}=10^{-9+3}=10^{-6}= \frac{1}{10^6} = \frac{1}{1000000} =0,000001
8 0
3 years ago
A water molecule is made up of 3 atoms. One third of the atoms are oxygen and the remaining atoms are hydrogen. If there are 114
Mashcka [7]

Answer:

228 hydrogen atoms

Step-by-step explanation:

In a water molecule,

1/3rd is oxygen atoms, and

2/3rd (1 - 1/3 = 2/3) is hydrogen atoms

If there are 114 water molecules,

Total number of atoms would be:

3 * 114 = 342 (1 oxygen and 2 hydrogen atoms in 1 water molecule)

Out of these, 2/3rd would be hydrogen atoms, so:

\frac{2}{3}*342=228

There would be 228 hydrogen atoms

7 0
3 years ago
Adam is a salesperson in a video store. He is paid $100 every week plus a commission
olya-2409 [2.1K]

Answer: 100 + x = $1567

Step-by-step explanation:

8 0
3 years ago
How do these numbers compare? 9.002 9.022
Marianna [84]
9.002 < 9.022
9.022 is a larger number than 9.002
5 0
3 years ago
What is the equation for the parabola that<br> has a focus at (-7, 6) and a directrix of x<br> 1?
Ne4ueva [31]

Answer:

Step-by-step explanation:

Parabola's equation is

y

=

1

16

(

x

−

7

)

2

+

1

and vertex is

(

7

,

1

)

.

Explanation:

Parabola is locus of a point which moves so that its distance from a given point calld focus and a given line ccalled directrix is always constant.

Let the point be

(

x

,

y

)

. Here focus is

(

7

,

5

)

and distance from focus is

√

(

x

−

7

)

2

+

(

y

−

5

)

2

. Its distance from directrix

y

=

−

3

i.e.

y

+

3

=

0

is

|

y

+

3

|

.

Hence equaion of parabola is

(

x

−

7

)

2

+

(

y

−

5

)

2

)

=

|

y

+

3

|

2

or

x

2

−

14

x

+

49

+

y

2

−

10

y

+

25

=

y

2

+

6

y

+

9

or

x

2

−

14

x

+

65

=

16

y

i.e.

y

=

1

16

(

x

2

−

14

x

+

49

−

49

)

+

65

16

or

y

=

1

16

(

x

−

7

)

2

+

65

−

49

16

or

y

=

1

16

(

x

−

7

)

2

+

1

Hence parabola's equation is

y

=

1

16

(

x

−

7

)

2

+

1

and vertex is

(

7

,

1

)

.

graph{(1/16(x-7)^2+1-y)((x-7)^2+(y-1)^2-0.15)((x-7)^2+(y-5)^2-0.15)(y+3)=0 [-12.08, 27.92, -7.36, 12.64]}

3 0
3 years ago
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