Does anyone know how to 10th-grade algebra

Mathematics

2 answers:

makkiz [27]3 years ago

7 0

What’s the question??

Savatey [412]3 years ago

4 0

Answer:

Step-by-step explanation:

the answer is (f-g)(x) = 4^x -5x -14

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A garden has an area of 286ft. It’s length is 9ft more than it’s width. What are the dimensions of the garden?

Gelneren [198K]

Answer:

Step-by-step explanation:

x × (x + 9) = x² + 9x = 286
x² + 9x - 286 = 0
(x - 13)(x + 22)
x = 13 or -22
Since you cannot have negative length, it’s 13

3 0

2 years ago

The lifetime of two light bulbs are modeled as independent and exponential random variables X and Y, with parameters lambda and

Scorpion4ik [409]

Answer:

$\bf h(x)=max(\lambda,\mu) e^{-max(\lambda,\mu) x}\;(x\geq0)$

Step-by-step explanation:

The PDF of X is

$\bf f(x)=\lambda e^{-\lambda x}\;(x\geq0)$

The PDF of Y is

$\bf g(x)=\mu e^{-\mu x}\;(x\geq0)$

The means of X and Y are respectively,

$\bf \displaystyle\frac{1}{\lambda}\;,\displaystyle\frac{1}{\mu}$

so we can see that the larger the parameter, the smaller the mean. Hence the PDF of Z = min(X, Y) is an exponential with the largest parameter of the two.

Therefore, the PDF of Z is

$\bf h(x)=max(\lambda,\mu) e^{-max(\lambda,\mu) x}\;(x\geq0)$

7 0

3 years ago

A 100 centimeter stick broke into 3 pieces one piece was 7 centimeters long and another was 34 centimeters long how long was the

emmasim [6.3K]

The third piece is 59 cm long.

Add the first two pieces up. 7+34= 41. Since the whole stick is 100 cm long, subtract 41 from 100 to find the length of the third piece. 100-41=59.

6 0

3 years ago

Read 2 more answers

The local hardware store wants to increase their inventory. last year 15 electric screwdrivers cost them $300. at the same cost,

VMariaS [17]

Answer:

Cost of 45 screwdrivers will be = $900

Step-by-step explanation:

Last year 15 electric screwdrivers cost to the local hardware store = $300

So per screwdriver cost = $\frac{\text{Total cost}}{\text{Total number of screw drivers}}$