Please please please someone help me

Mathematics

2 answers:

Lisa [10]3 years ago

8 0

Answer:

x=15

Step-by-step explanation:

Substutting in q(x) makes 3=4/5x-9

Add 9 to both sides to get 12=4/5x

Divide both sides by 4/5 and get 15=x

Thus, x=15

Zolol [24]3 years ago

7 0

Answer:

Step-by-step explanation:

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When two identical ions are separated by a distance of 4.2×10−10 , the electrostatic force each exerts on the other is 5.2×10−9

Effectus [21]

F = kq2 / r2
q = ne
F = k(ne)2 / r2
n = âš(r2F / ke2) = (r/e) âš(F/k)
k = 9 x 109 Nm2/C2
e = 1.6 x 10-19 C
n = [(4.2 x 10-10) / (1.6 x 10-19)] âš[(5.2 x 10-9) / (9 x 109)] â‰… 1.995 â‰… 2

7 0

3 years ago

What is 5 x 5 in expanded form<br>

NikAS [45]

Answer:

5×10°

Hope this helped you!!!

3 0

4 years ago

Help me with 16,18 and 20

Mandarinka [93]

16: -7(5)= -35 ( REMEMBER THE MOUTH EATS THE BIGGEST NUMBER!)
-6(-6)= 36 therefore 36 is greater than -35
18: they are exactly the same because in multiplication with inters it matters when the signs change. so 3(-6) = -18 ad -3(6)= -18 then -18=-18
20: Same as 18 where division has the same rules. if 8x5=40 then 40/8=5
-40/8=-5 and 40/(-8)=-5 then -5=-5
answers:

8 0

3 years ago

Read 2 more answers

Because all airline passengers do not show up for their reserved seat, an airline sells 125 tickets for a ﬂight that holds only

bekas [8.4K]

Answer: a) 0.9961, b) 0.9886

Step-by-step explanation:

Since we have given that

Probability that does not show up = 0.10

Probability that show up = 0.90

Here, we use "Binomial distribution":

n = 125 and p = 0.90