Question

a bookshop has a total of 760 pens and rulers. 70% of the pens and 60% ofthe rulers were sold. the owner of the bookshop bought 41 rulers. on the end, the number of pens left was three times the number of rulers left.

300

likes

1499 views

Answer to a math question a bookshop has a total of 760 pens and rulers. 70% of the pens and 60% ofthe rulers were sold. the owner of the bookshop bought 41 rulers. on the end, the number of pens left was three times the number of rulers left.

$Expert avatar$

Maude

4.7

108 Answers

let he has p pens and r rulers the total is 760 p+r=760 ----eq1 70% pens sold means 0.7p sold therefore 0.3p will be left with him 60% of rulers sold means 0.6r sold therefore 0.4r will be left with him now he bought 41 rulers therefore the total rulers he has is 41+0.4r the number of pens is three times the number of rulers left 3(41+0.4r)=0.3p ---eq2 by eq1 3\left(41+0.4r\right)=0.3\left(760-r\right)

1.2r+123=228-0.3r

r=\frac{105}{1.5}=70 p=760-r p=760-70 p=690

Frequently asked questions (FAQs)

Math question: In a triangle ABC, given angle A = 60°, side b = 8, and side c = 10, find side a using the sine law.

Math question: In a right triangle, if the length of one leg is 5 units and the length of the other leg is 12 units, what is the length of the hypotenuse?

What is the equivalent of 3.2 x 10^4 in standard notation?

New questions in Mathematics

4.2x10^_6 convert to standard notation

How many different ways can a psychology student select 5 subjects from a pool of 20 subjects and assign each one to a different experiment?

the probabilty that a person has a motorcycle, given that she owns a car 25%. the percentage of people owing a motorcycle is 15% and that who own a car is 35%. find probabilty that a person owns any one or both of those

Credit title that represents a payment order. This model, which emerged in Brazil, can only be issued in two specific situations: in the purchase and sale of commercial products or in the provision of services. Select the correct alternative: Question 6Answer The. Present value B. Promissory note w. Present value d. Duplicate It is. Bill of exchange

I need to know what 20% or £3292.75

determine the polynomial F of degree 2 that interpolates. f at points (0;1) (2;5) (4;6). calculate F(0.8). Note: Using the polynomial expression with difference operator.

Engineers want to design seats in commercial aircraft so that they are wide enough to fit 95% of all males. (Accommodating 100% of males would require very wide seats that would be much too expensive.) Men have hip breadths that are normally distributed with a mean of 14.4 in. and a standard deviation of 1.2 in. Find P95. That is, find the hip breadth for men that separates the smallest 95% from the largest 5%.

2)A tourist has 15 pairs of pants in his hotel room closet. Suppose 5 are blue and the rest are black. The tourist leaves his room twice a day. He takes a pair of pants and puts them on, the tourist leaves the first pair of pants in the closet again and takes another one and puts them on. What is the probability that the two pants chosen are black?

User One of the applications of the derivative of a function is its use in Physics, where a function that at every instant t associates the number s(t), this function s is called the clockwise function of the movement. By deriving the time function we obtain the velocity function at time t, denoted by v(t). A body has a time function that determines its position in meters at time t as S(t)=t.³√t+2.t . Present the speed of this body at time t = 8 s.

Which statement best describes the key changes in perspectives on inclusion? An inclusive program must consider the unique experiences of every child and family as well as the child's strengths and needs. There is a shift in thinking about individual programs as "inclusive programs" to thinking about inclusion as something that reflects the cultural influence of the family. There is a greater emphasis on barriers to full participation and the acknowledgement that all children are unique and must be fully and meaningfully engaged in a program. In an inclusive program all participants are accepted by their peers and other members of the community.