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3 years ago

Eva tried to evaluate an expression step by step.

Mathematics

1 answer:

Rudiy273 years ago

7 0

Answer:

c. step three

Step-by-step explanation:

CORRECT WAY

step one: -7/ -2 / 4/9 (flip 4/9)

step two: -7/-2 * 9/4 (simplify)

step three: = 63/8

Step three is incorrect because it's not - it's positive.

She forgot that a negative divided by a negative is a positive.

So -7/-2 is the same as 7/2

Hope this helps ya!!!

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Assume that a procedure yields a binomial distribution with n trials and the probability of success for one trial is p. Use the

KiRa [710]

Answer:

395, 17.212

(360.576,429.424)

Step-by-step explanation:

Given that a procedure yields a binomial distribution with n trials and the probability of success for one trial is p.

Here $n=1580and p =1/4 =0.25\\q = 0.75\\np = 395 and\\nq = 1185$

Since np and nq are greater than 5 by rule of thumb we can approximate binomial to normal.

Mean = np = 395

Variance = npq = $395*0.75=296.25$

Std dev = 17.212

Thus X no of successes is N(395, 17.212)

THe the minimum usual value mu minus 2 sigma and the maximum usual value mu plus 2 sigma would be

$395-2(17.212), 395+2(17.212)\\= 360.576,429.424$

8 0

3 years ago

Bill had a $7 coupon for the purchase of any item. He bought a dvd recorder that was on sale forlu

IgorC [24]

Answer:

5 maybe

Step-by-step explanation:

6 0

3 years ago

What us the multiplicative inverse of 10^-10

natima [27]

Answer:

It would be the negative numbers

Step-by-step explanation:

6 0

4 years ago

What two nonnegative real numbers with a sum of 60 have the largest possible product?

kogti [31]

The biggest possible real number = 60 ÷ 2 = 30

30 + 30 = 60

Largest Product = 30 x 30 = 900

Answer: The two numbers are 30 and 30.

6 0

3 years ago

What would z and x equal i need help plz

KATRIN_1 [288]

Answer:

Angle Z =79° and x = 31.33

Step-by-step explanation:

From the shown parallel and intersecting lines , it is found that,

∠z° = 79° interior angle on same side of transversal

and ∠z = (6x - 109°) corresponding angles

i.e 79°+109°= 6x

or, 188 = 6x

i,e x = 31.33

Hence angle z =79° , and x = 31.33

3 0

4 years ago