MATHEMATICS HIGH SCHOOL

Express 5×-4y=20 in the form a×+by+c=0and write the value of a,band c

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Answers

Answer 1
Answer:

Answer:

a = 5

b = -4

c = -20

Step-by-step explanation:

Here, we want to express the given equation in the following form;

So we can have this as;

5x-4y-20 = 0

That means we have;

a as 5

b as -4

and c as -20

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N to the first power divided by (n - r) to the first power

Answers

(n^1)/((n-r)^1)=(n)/(n-r)

What is 5 7/8 rounded to the nearest whole number?

Answers


The next larger whole number is  6 .
The next smaller whole number is  5 .
5-7/8  is closer to  6  than it is to  5 .

Identify the 42nd term of an arithmetic sequence where a1 = -12 and a27 = 66

Answers

The arithmetic formula is expressed as an = a1 + d *(n-1)where n is an integer. Substituting from the given a1 = -12 and a27 = 66, 66 = -12 + d *(27-1). hence  , d is equal to 3. a42 thus using the formula is equal to 111. The final answer to this problem is 111.

Answer:

42nd term is 111

Step-by-step explanation:

a_1=-12,a_(27)=66

Now, Using formula of nth term of an A.P. we have :

a_n=a+(n-1)* d\n\text{Take n=27}\n\implies a_(27)=-12+(27-1)* d\n\implies 66=-12+26\cdot d\n\implies 26\cdot d = 78\n\implies d = 3

Now, first term a = -12 , n = 42 and d = 3

So, 42nd term is :

a_(42)=-12+(42-1)* 3\n\implies a_(42)=-12+41* 3\n\implies a_(42)=-12+123\n\bf\implies a_(42)=111

Hence, 42nd term is 111

HELP ASAP!!! BRAINLIEST!

Answers

its a b and c they all equal 45

Answer:

1 * 45

5 * 9

3 * 15

Hope this helps!

Please,  consider brainliest. I only have 5 left then my rank will go up.

See image for question.​

Answers

Answer:

  • See below

Step-by-step explanation:

#3

  • P(A) = 3/8
  • P(B) = 2/7

(i)

  • P(A and B) = P(A) * P(B) = 3/8*2/7 = 3/28

(ii)

  • P(A or B) = P(A) + P(B) - P(A and B) = 3/8 + 2/7 - 3/28 = 1/56(21 + 16 - 6) = 31/56

(iii)

  • P(not A and not B) = P(not A) * P(not B) = (1 - 3/8)*(1 - 2/7) = 5/8*5/7 = 25/56

Another way:

  • P(not A and not B) = 1 - P(A or B) = 1 - 31/56 = 25/56

#4

Outcomes with two fair coins: TT, TH, HT, HH

Outcomes with normal dice: 1 to 6

a)

  • P(odd number) = 3/6 = 1/2

b)

  • P(two heads and an even number) = 1/4*3/6 = 1/8

c)

  • P(head and tail) = 1/2
  • P(prime) = 3/6 = 1/2 (primes are 2, 3 and 5)
  • P(head, tail and prime) = 1/2*1/2 = 1/4

d)

  • P(two tails and odd number) = 1/4*3/6 = 1/8

My mum was 27 when I was born. 8 years ago she was twice as old as I shall be in 5 years time. How old am I now?

Answers

use timeline and work from NOW
me. mom
(1) @born 0. 27
My mum was 27 when I was born.
(2) now-8. x-8. y-8
(3) now. x y
(4) now+5. x+5. y+5

(1)&(3). y-x = 27-0 = 27

8 years ago she was twice as old as I shall be in 5 years time.
(2)&(4). y-8 = 2(x+5)

2 variables 2 equations ... solve x
x = 9, y = 36
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