All categories

4 years ago

Who can help me needed for tomorrow please

Mathematics

2 answers:

Anna11 [10]4 years ago

8 0

A)
8n - 30 = 170
8n = 200
n = 25
answer
25 items bought

b)
8(25) - 40 = 200 - 40 = 160
160<170...decrease

answer
profit would decrease by $10 (170 - 160 = 10)

blagie [28]4 years ago

6 0

a) 170.00 =8n -30

200= 8n

n = 200/8 = 25 items

b) since the expenses increased the profits would decrease

profit = 8(25)-40 = 200-40 = 160

170-160 = 10.00

profit decreased by $10.00

You might be interested in

How do you simplify 1/9+4x=44 1/9?

creativ13 [48]

Answer:

To divide fractions you have to multiply by the reciprocal of the second fraction:

(1/9)-(1/n) * 9/(1+9)

Now, focus on the left side of the multiplication sign. In order to subtract the 2 fractions, you need a common denominator, 9n. Multiply each fraction to make their denominators equal to 9n:

1/9 * n/n = n/9n

1/n * 9/9 = 9/9n

Now it should look like this: (n/9n) - (9/9n)

Subtract the 2 fractions to get: n-9/9n

The full problem should look like this: (n-9/9n) * 9/(1+9)

To help with simplifying later, you can cancel out the 9 in the denominator of the first fraction and the 9 in the numerator of the second fraction because 9/9 = 1.

Now you have: n-9/n * 1/(1+9)

Multiply across:

Numerator: n-9 * 1 = n-9

Denominator (distribute the n): n * 1+9 = n(1+9)

Your answer is: n-9/n(1+9)

7 0

4 years ago

Read 2 more answers

Punctele O, A, B, C sunt coliniare în această ordine, iar segmentele OA, AB și BC au lungimile exprimate în cm, prin numere natu

julia-pushkina [17]

Răspuns:

a) OC = 18cm

b) MN = 6cm

Explicație pas cu pas:

Găsiți diagrama la întrebarea atașată.

a) Din diagramă se poate observa că OC = OA + AB + AC

OC = 2n + 2n + 2 + 2n + 4

OC = 6n + 6

Următorul este să obțineți valoarea lui n:

OM = OA + AM

Să obținem segmentul AM;

Deoarece M este segmentul mijlociu al AC, atunci;

AM = AC / 2

AM = AB + BC / 2

AM = 2n + 2 + 2n + 4/2

AM = 4n + 6/2

AM = 2n + 3

Din moment ce OM = OA + AM

OM = 2n + 2n + 3

OM = 4n + 3

Dat fiind OM = 11

11 = 4n + 3

4n = 11-3

4n = 8

n = 2

Următorul pas este să calculați OC;

OC = 6n + 6

OC = 6 (2) + 6

OC = 18

Prin urmare, lungimea segmentului OC este de 18 cm

b) Această întrebare ne cere să găsim segmentul de linie MN.

Din diagramă, MN = AM - AN

Deoarece AM = 2n + 3 din întrebarea 1;

AM = 2 (2) +3

AM = 4 + 3

AM = 7

Acum, să obținem AN:

Din diagramă, AN = ON-OA și ON = OB / 2

AN = OB / 2 - OA

AN = (2n + 2n + 2) / 2 - 2n

AN = 4n + 2/2 - 2n

AN = 2n + 1 - 2n

AN = 2n-2n + 1

AN = 1

De la MN = AM - AN

MN = 7 - 1

MN = 6cm

Prin urmare, distanța dintre N, mijlocul segmentului OB și punctul M este de 6cm

6 0

4 years ago

There are 39 students sitting on the bleachers and 6 students sitting on the floor. What is the ratio of the number of students

Aleks [24]

Answer:

39;45

Step-by-step explanation:

students on the floor;total students

5 0

4 years ago

Read 2 more answers

Engineers want to design seats in commercial aircraft so that they are wide enough to fit 99% of all males. (Accommodating 100

Nezavi [6.7K]

Answer:

p99 = 16.4 inches

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Men have hip breadths that are normally distributed with a mean of 14.3 in. And a standard deviation of 0.9 in.

This means that $\mu = 14.3, \sigma = 0.9$