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ss7ja [257]
4 years ago
10

Justify each step. 2x-5=-20 2x=-15 X=-15/2

Mathematics
1 answer:
Ilia_Sergeevich [38]4 years ago
3 0
This is a linear equation, and it is solved for finding the value of x.
2x - 5 = -20
now simple number -5 goes to the other side of equation and turns into +5, then the equation becomes
2x = -20 +5
now we get 2x = -15
because -20 + 5 = -15, greater number is 20 then 5 and 20 is with - sign.
the next step is x = -15/2
in 2x, 2 is multiplying with x when it goes to the other side of equation 2 will be divided with -15, that's why we get
x = -15/2
which is the value of x
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If rs150000 are invested today in a saving account ,how much money would there be in the account after 5 years if the compound i
ki77a [65]

Answer:

so the answer is RS 20200

Step-by-step explanation:

simple formula for calculation ( as  for compound interest you have to invest initially)

starting total investment Pₓ = Rs 150000

Interest rate r= 6 %              =        0.06  

compounds in years total K = (12 months)

for how many year you want to invest Pₙ = 5  

formula

  Pₙ =  Px  (1 +  r/k) ⁿ ˣ  ¹²

P₅  =   150000 (1 + .06/12)  ¹² ˣ⁵

  =    150000 (1.005) ⁶⁰

  = 150000 x 1.348

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5 0
3 years ago
A parking lot is 100 yards long. What is the length of
Effectus [21]
100 yards = 300 feet

1 yard = 3 feet
6 0
4 years ago
The area of a rectangle is 108 m2 and its diagonal is 15 m. Find
Andre45 [30]

Answer:

47.6m.

Step by step solution:

Perimeter of a triangle = base + 2 . length____(1)

Area of a triangle = 1/2 . base . diagonal

108 = 1/2 . base . 15

multiplying both sides by 2:

216 = 15 . base

dividing both sides by 15:

base = 14.4m

But the diagonal divides the triangle into two

right angle triangles each with the same length (hypotenuse),base and diagonal(height).

Taking one right angle triangle:

And using pythagoras theorem;

length² = base² + diagonal ²

length² = 7.2² + 15²

Note: Base of each right angle triangle is 7.2 which would sum up to be 14.4 the base of the full triangle.

length² = 276.84

taking the square root of both sides:

length = 16.6m

Putting the values of the base and length into equation (1).

Perimeter of the triangle = 14.4 + 2 . 16.6

Note: We are dealing with the whole triangle

now hence the base is 14.4m.

Perimeter of the triangle = 14.4 + 33.2 = 47.6m.

6 0
3 years ago
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4 0
3 years ago
3(x+1)=-2(x-1) +6 solve for x
Artist 52 [7]

Answer: x=1

Step-by-step explanation:

3(x+1)=-2(x-1)+6

remove the parentheses

3x+3=-2x+2+6

calculate

3x+3=-2x+8

move the terms

3x+2x=8-3

collect like terms calculate

5x=5

divide both sides

x=1

sorry if its wrong i tried my best

4 0
4 years ago
Read 2 more answers
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