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4 years ago

Which substance is used to remove rust from metal?

Mathematics

2 answers:

True [87]4 years ago

6 0

Vinegar is the best product to remove rust from metal

Charra [1.4K]4 years ago

3 0

You can use hydrochloric acid

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What is 10 to the 4 power divided by 10 to the 19 power?

xxTIMURxx [149]

10 to the negative 15 (10^-15) power

8 0

3 years ago

What is the solution to the system of equations below? 2x-y=10 and y=-1/2x+5

Vlad1618 [11]

Answer: (x,y) = (6,2)

Step-by-step explanation: hope this helps!!!!!

8 0

3 years ago

PLEASE HELP ASAP!!!!!! Quadrilateral PQRS, with vertex P(-5, -3), undergoes a transformation to form quadrilateral P′Q′R′S′, wit

Nana76 [90]

Answer:

The vertex Q' is at (4,5)

Step-by-step explanation:

Given:

Quadrilateral PQRS undergoes a transformation to form a quadrilateral P'Q'R'S' such that the vertex point P(-5,-3) is transformed to P'(5,3).

Vertex point Q(-4,-5)

To find vertex Q'.

Solution:

Form the given transformation occuring the statement in standard form can be given as:

$(x,y)\rightarrow (-x,-y)$

The above transformation signifies the point reflection in the origin.

For the point P, the statement is:

$P(-5,-3)\rightarrow P'(5,3)$

So, for point Q, the transformation would be:

$Q(-4,-5)\rightarrow Q'(-(-4),-(-5))$

Since two negatives multiply to give a positive, so, we have:

$Q(-4,-5)\rightarrow Q'(4,5)$

5 0

3 years ago

A line has a slope of 1/4 and passes through .0.41 -1/2 what is the value of the Y intercept

MrMuchimi

Answer:

-1/2

Step-by-step explanation:

the y intercept is where the line crosses the y axis. The problem states that it passes through (.41, -1/2) which means the y intercept is -1/2. I'm not sure if the - is a dash or negative sign but either way you now know what the y intercept is.

5 0

3 years ago

Wendy's restaurant has been recognized for having the fastest average service time among fast food restaurants. In a benchmark s

VikaD [51]

Answer:

(a) 0.2885

(b) 0.0736

Step-by-step explanation:

The exponential distribution of Wendy's service time is given by:

P(x) = [exp (-x/μ)]/μ............................................................................ (1)

P(x) = Probability function

x = Service time, in minute

μ = average service team, in minute, 2.2 minutes

(a) x= 1, substituting into equation (1) we have:

P(1) = [exp (-1/2.2)]/2.2

= 0.6347/2.2

= 0.2885

(b) x₁ = 0.5 minutes

x₂ = 1 minute

P (0.5<x<1) = P(0.5) -P(1) ----------------------------------------------- (2)

From (a), P (1) = 0.2885

P(0.5) =P(1) = [exp (-0.5/2.2)]/2.2

= 0.7967/2.2

= 0.3621

Substituting into (2), we have :

P (0.5<x<1) = 0.3621 -0.2885

= 0.0736

= 0.1030/2.2

= 0.0468

7 0

3 years ago