Solve for x: * 67 134 9 144

Machine A can complete a certain job in x hours. Machine B can complete the same job in y hours. If A and B work together at the

scZoUnD [109]

Answer:

$\frac{y}{x+y}$

Step-by-step explanation:

The required answer is the rate at which Machine A works when the two machines are combined.

Note: the rate of doing work is express as

$rate=\frac{1}{time taken} \\$

Hence we can conclude that Machine A working rate is

$machine A=\frac{1}{x} \\$ and machine B working rate is

$machine B=\frac{1}{y} \\$

When the two machine works together, the effective working rate is

$\frac{1}{x}+\frac{1}{y}\\\frac{xy}{x+y}\\$

The fraction of the work that Machine B will not have complete because of Machine A help is the total work done by machine A

Hence the fraction of work done by A is expressed as

$\frac{1}{x}*combine working rate$

$\frac{1}{x}*\frac{xy}{x+y}\\\frac{y}{x+y} \\$

Hence the fraction of the work that Machine B will not have complete because of Machine A help is the total work done by machine A is $\frac{y}{x+y} \\$

6 0

3 years ago

The statement "The square of any rational number is rational" can be rewritten formally as "For all rational numbers x, x 2 is r

____ [38]

Answer:

a.

For all non zero fraction 1(1/x), 1/x is a fraction

For all 1/(1/x), if 1/(1/x) is non zero, 1/x is a fraction

b.

For all polynomial function f(x) = x³ + x² + x - 1, the derivative (dy/dx) is a polynomial function

For all f(x) x³ + x² + x - 1, if f(x) is polynomial, f'(x) is a polynomial function

c.

For all angles x,y,z of a triangle, the sum, x + y + z = 180

For all x,y,z, if x,y and z are the angles of a triangle, x+y+z = 180

d.

For all irrational numbers x, -x is irrational

For all x, if x is irrational then -x irrational.

e.

For two integers, x and y, the sum x+y is an integer

For x,y if x and y are integers, then x + y is an integer

f.

For two fractions, x/y and a/b the product ax/by is a fraction

For x/y and a/b, if x/y and a/b are fractions then ax/by is a fraction

3 0

3 years ago

Please show step by step for this question.

ruslelena [56]

Answer:

y= -1.46 (to 3 s.f.)

Step-by-step explanation:

Please see the attached picture for full solution.

7 0

3 years ago

WILL GIVE BRAINLIEST!!

aleksley [76]

Answer:

sorry its rushing me

Step-by-step explanation:

(B) 0

(A)12%=85% the other half is the answer

8 0

3 years ago

What is 2x+y=5. I am stuck

timurjin [86]

Answer:

y=−2x+5

Step by step explanation:

You need to put it in standard form which is y = mx+b.

If you want to find the Y intercept, substitute 0 into X.

X = 2.5

If you want to find the X intercept, substitute 0 into Y

Y = 5

The slope is -5 by the way.

4 0

3 years ago