3 years ago

Rewrite the expression with positive exponents. x^-8 Plz help!

Mathematics

1 answer:

dangina [55]3 years ago

7 0

The answer to this is 25 hope it helps

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One positive number is 1/5 of another number the difference of the two numbers is 72 find the numbers

SpyIntel [72]

Let x be the lowest positive number Then the other number = 5x.

So 5x - x = 72

4x = 72

x = 18

So the numbers are 18 and 90 answer

8 0

3 years ago

Suppose that replacement times for washing machines are normally distributed with a mean of 9.3 years and a standard deviation o

Ad libitum [116K]

The probability will be found as follows:
z-score is given by:
z=(x-μ)/σ
where:
mean-μ=9.3
standard deviation-σ=1.1
but
σ/√n=1.1/√70=0.1315
thus the z-score will be:
z=(9.1-9.3)/0.1315
z=-1.5209
thus:
P(x<9.1)=P(z<-1.5209)=0.0643

7 0

3 years ago

Solving Rational equations. LCD method. Show work. Image attached.

Ugo [173]

Answer:

$k=\frac{1}{2}$

Step-by-step explanation:

The given rational equation is

$\frac{5k}{k+2}+\frac{2}{k}=5$

The Least Common Denominator is

$k(k+2)$

Multiply each term by the LCD.

$k(k+2)\times \frac{5k}{k+2}+k(k+2)\times \frac{2}{k}=5k(k+2)$

Simplify;

$k\times \frac{5k}{1}+(k+2)\times \frac{2}{1}=5k(k+2)$

$\Rightarrow k(5k)+2(k+2)=5k(k+2)$

Expand;

$\Rightarrow 5k^2+2k+4=5k^2+10k$

Group similar terms;

$\Rightarrow 5k^2-5k^2+2k-10k=-4$

$\Rightarrow -8k=-4$

Divide by -8.

$k=\frac{1}{2}$

5 0

2 years ago

Find the measure of a regular 45 agon

lilavasa [31]

Answer:

172 degrees

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

A group of four friends are playing golf. The total cost of the round of golf is $108. Each person in the group has the same cou

azamat

Answer:

Each coupon was worth $8.

Hope this is helpful! =)

5 0

2 years ago