All categories

3 years ago

Rewrite the expression 2(3 - 4k) as a difference. Show your work.

Mathematics

1 answer:

Marrrta [24]3 years ago

4 0

Answer:

Step-by-step explanation:

Use Distributive Property: a*(b -c) = a*b - a*c

2(3 -4k) = 2*3 - 2*4k

= 6 - 8k

You might be interested in

for every $2 kendra spent on materials, she could make 5 coasters. She made 60 coasters and sold them for the York Beach Fair, c

TEA [102]

Her profit was 126$ because she spent 24$ on her materials and then charged 5$ per 2 so you get 150$ then subtract the 24
(I think)

7 0

4 years ago

X - 2 = 16 A. 14 B. 18 C. 21 D. 12

Vlada [557]

X=18
Because you would add 2 to both sides so it would be x=16+2 which equals 18

5 0

3 years ago

If a certain machine makes electrical resistors having a mean resistance of 40 ohms and a standard deviation of 2 ohms, what is

V125BC [204]

Answer:

The probability is $P(\= X < 40.4) = 0.84134$

Step-by-step explanation:

From the question we are told that

The mean is $\mu =40 \ \Omega$

The standard deviation is $\sigma = 2 \ \Omega$

The sample size is n = 25

The combined resistance is $\sum x_i = 1010 \ \Omega$

Generally the sample mean is mathematically represented as

$\= x = \frac{\sum x_i }{n}$

=> $\= x = \frac{1010 }{25}$

=> $\= x = 40.4 \ \Omega$

Generally the standard error of the mean is mathematically represented as

$\sigma_{x} = \frac{\sigma }{\sqrt{n} }$

=> $\sigma_{x} = \frac{ 2 }{\sqrt{25} }$

=> $\sigma_{x} = 0.4$

Generally the probability that a random sample of 25 of these resistors will have a combined resistance of less than 1010 ohms is mathematically represented as

$P(\= X < 40.4) = P( \frac{\= X - \mu }{\sigma_{x }} < \frac{ 40.4 - 40 }{0.4} )$

$\frac{\= X -\mu}{\sigma } = Z (The \ standardized \ value\ of \ \= X )$

$P(\= X < 40.4) = P( Z < 1 )$

From the z table the area under the normal curve to the left corresponding to 1 is

$P(\= X < 40.4) = P( Z < 1 ) = 0.84134$

$P(\= X < 40.4) = 0.84134$

3 0

3 years ago

Solve for x (6/5) x-4=46

alukav5142 [94]

(6/5) x - 4 = 46

Add 4 to both sides

(6/5)x = 50

To get rid of (6/5) multiply the inverse number by both sides. Inverse number is (5/6)

x = 50 * 5/6

x = (125/3)

5 0

3 years ago

The distance from Town A to Town B on a map is 6 inches. The actual distance from Town B to Town C is 12 miles. The scale on the

Airida [17]

True since each inch is 4 miles you time 6 by 4
false it says it is 12 miles so you divide that by 4 to get the inches
false if A to B is 24 and B to C is 12 miles there is clearly much more then 4 miles between A and C

7 0

4 years ago