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4 years ago

Please please answer my question please ASAP

Mathematics

2 answers:

Lemur [1.5K]4 years ago

8 0

Answer:

D:256

Step-by-step explanation:

the rule is times -4

-64 times -4 is 256

pashok25 [27]4 years ago

7 0

Answer:

256 (Answer D)

Step-by-step explanation:

This is a geometric sequence with first element -4 and common ratio -4. Thus, every new term is equal to -4 times the preceding term.

Here, we multiply -64 by -4 to find the fourth term:

-4(-64) = 256

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4 years ago

Solve the two step equation 8x+38=60

Paladinen [302]

Answer:

x = 2.75

Step-by-step explanation:

The goal here is to isolate the variable, or to get x by itself. We can do this by using simple math. The first step is to move every thing to the opposite side of x. We do this by subtracting 38 from 60, which leaves us with 22. Now we want divide 22 by 8. After doing this we are left with the equation x = 2.75. I know that at first fractions and decimals seem annoying and they feel like a lot of work. But if you take a second to really look at them, you will realize they are not that bad. As in most cases with math, looks can be deceiving

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4 years ago

the distribution of heights of adult American men is approximately normal with mean 68 in and a standard deviation of 2.5 in wha

melamori03 [73]

Let x be a random variable representing the heights of adult American men. Since it is normally distributed and the population mean and standard deviation are known, we would apply the formula,

z = (x - mean)/Standard deviation

From the information given,

mean = 68

standard deviation = 2.5

The probability that the height of a selected adult is between 63 and 73 is expressed as

$P(68\leq x\leq73)$

For x = 63,

z = (63 - 68)/2.5 = -2

Looking at the normal distribution table, the probability corresponding to the z score is 0.02275

For x = 73,

z = (73 - 68)/2.5 = 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.97725

Therefore,

$P(68\text{ }\leq x\leq73)\text{ = 0.97725 - 0.0}2275\text{ = 0}.9545$

Thus, the percentage of men are between 63 and 73 is

0.9545 * 100 = 95.45%

Rounding up to the nearest percentage, the answer is 95%

8 0

1 year ago

What is -5/4 minus 7?

DaniilM [7]

Answer:

-33/4 or -8 1/4

Step-by-step explanation:

Make similar terms:

-5/4 - 28/4: then solve

-5 - 28 = -33: put over 4

-33/4: simplify

-8 1/4

7 0

4 years ago

Read 2 more answers

The price of one share of stock in BadInvestment.com plunged 14 points in 4 weeks. Find the average change in the stock price pe

kiruha [24]

4 weeks at 7 days per week = (4 x 7) = 28 days

28/-14 = - 2....so the average change is -2 per day

3 0

3 years ago