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3 years ago

Two particle with charges q and −q are fixed at the vertices of an equilateral triangle with sides of length

Mathematics

1 answer:

brilliants [131]3 years ago

5 0

Answer:

k(qq)/r^2 times the length of the distnace

Step-by-step explanation:

Force times distance. The Electrical force is the only thing you have to find first.

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5 is the result of 12 more than 3/4 of some number. What is the number?

iragen [17]

5= 12+3/4x, identify x

-7=3/4x, isolate x

-7(4/3)=x, -28/3=x

3 0

3 years ago

How many times does the graph of 4x = 32 - x2 cross the x-axis? 0 1 2

Yakvenalex [24]

Answer:

Step-by-step explanation:

4x = 32 - x2 would be much clearer if written as 4x = 32 - x^2. Please use

" ^ " to indicate exponentiation.

Rewrite 4x = 32 - x^2 in the standard form of a quadratic: x^2 + 4x - 32

Then the coefficients are a = 1, b = 4 and c = -32.

Find the discriminant. It is b^2-4ac.

Here, b^2-4ac = 4^2 - 4(1)(-32), or 16 + 128, or 144.

Because the discriminant is positive, we know immediately that this quadratic has two real, unequal roots.

So, the answer to this question is "the graph of 4x = 32 - x^2 cross the x-axis in two places."

4 0

3 years ago

Read 2 more answers

the cost of renting a scooter is represented by 3j+5. Write and simplify an expression that represents the cost of renting 6 sco

wariber [46]

Simplified expression that represents the cost of renting 6 scooters is 18 j +30

Step-by-step explanation:

Given data:

The cost of renting of a scooter is represented by 3j +5

So, from that, we can say in general,

The cost of renting of n scooters is represented by

$n \times(3 j+5)$

But according to given, the value of n is 6. i.e. to find the cost for six number of scooters. We can calculate now as follows

So, the cost of renting of a scooter is represented by

$6 \times(3 j+5)=18 j+30$

3 0

3 years ago

Again answer as many as you can

Keith_Richards [23]

For #3, it's 5.4 because you divide the total amount of money made by the amount of money earned per hour.

49.95/9.25=5.4 hours

7 0

3 years ago

Read 2 more answers

A student takes a multiple choice test with 40 questions. The probability that a student answers a given question correctly is 0

LenKa [72]

Answer:

Step-by-step explanation:

X no of questions student answers is binomial with n =40 and p =0.5

If approximated to normal, X is Normal with

mean = np = 20 and variance = npq = 10

P(X>N) >0.10

We use std normal distribution table to get z value first then convert to x value

$z>-1.28$

So $x>20-1.28(10) = 20-12.8 = 7.2$

This is with continuity correction.

Hence without continuity correction this equals 7.2-0.5 = 6.7

x>6.7

n = 7

6 0

3 years ago