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2 years ago

Slove 1/4(x-7)+5=7/8x

Mathematics

1 answer:

baherus [9]2 years ago

5 0

Answer: The answer is...9 and 1/2!

Step-by-step explanation: Subtraction of course!

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Solve for t. You must write your answer in fully simplified form. <br> −19= 7t

Olenka [21]

Answer: dot know srry

Step-by-step explanation:

8 0

3 years ago

A system has two failure modes. One failure mode, due to external conditions, has a constant failure rate of 0.07 failures per y

nadya68 [22]

Answer:

0.9177

Step-by-step explanation:

let us first represent the two failure modes with respect to time as follows

R₁(t) for external conditions

R₂(t) for wear out condition ( Wiebull )

Now,

$R1(t) = e^{-nt} .....1$

where t = time in years = 1,

n = failure rate constant = 0.07

Also,

$R2(t)=e^{-(\frac{t}{Q} )^{B} }......2$

where t = time in years = 1

where Q = characteristic life in years = 10

and B = the shape parameter = 1.8

Substituting values into equation 1

$R1(t) = e^{-(0.07)(1)} \\\\R1(t) = e^{-0.07}$

Substituting values into equation 2

$R2(t)=e^{-(\frac{1}{10} )^{1.8} }\\\\R2(t)=e^{-(0.1)}^{1.8} }\\\\R2(t)=e^{-0.0158}$

let the <em>system reliability </em>for a design life of one year be Rs(t)

hence,

Rs(t) = R1(t) * R2(t)

t = 1

$Rs(1) = [e^{-0.07} ] * [e^{-0.0158} ] = 0.917713$

Rs(1) = 0.9177 (approx to four decimal places)

5 0

3 years ago

If 1 pound of turkey costs $2.85 and 1 pound of beef costs $4.25 how much more does one whole and one fourth pounds of beef cost

raketka [301]

The answer is $1.75 more than the turkey

7 0

3 years ago

Question in the photo

Elena-2011 [213]

The answer would be: 13^3.

This is because 2-4= -2
Then you add -2 to 5 and you would get 3. So the exponent is 3.
I hope this helps :)

4 0

4 years ago

3. In the figure below, E is on AD and C is on BD. The dimensions given are in meters. What is the length, in meters, of CD?

damaskus [11]

Answer:

C. 3,960

Step-by-step explanation:

∆ADB ~ ∆EDC. Therefore,

$\frac{AB}{EC} = \frac{DB}{DC}$

$\frac{2,000}{1,200} = \frac{2,640 + x}{x}$ (substitution)

Solve for x

$\frac{5}{3} = \frac{2,640 + x}{x}$

Cross multiply

$5*x = 3(2,640 + x)$

$5x = 7,920 + 3x$

5x - 3x = 7,920

2x = 7,920

x = 7,920/2

x = 3,960 meters

7 0

3 years ago