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Recent questions and answers in Algebraic Expressions

Questions >> Olympiad-Math >> Class 7 >> Algebraic Expressions

By how much is a^2 – 7a + 5 less than 3a^2 + 2a + 5?

answered Dec 28, 2021 by tharaneeshthiyaanesh

1 answer

If a side of an equilateral triangle is 7x units then find the perimeter of the triangle.

answered Oct 7, 2021 by darkdarkshadow30

1 answer

Evaluate 12(x-t), if x = 7 and t = 2.

answered Jan 27, 2021 by barituaj5

1 answer

What should be added to x^2 + xy to obtain 5x^2 - xy?

answered Jan 20, 2021 by manjulamukh007

1 answer

Simplify the following: 2y + 9 + 8y + 7

answered Jun 15, 2019 by jumi9864794900

1 answer

From the sum of 4 + 3x and 5 – 4x + 2x^2, subtract the sum of 3x^2 – 5x and –x^2 + 2x + 5.

answered Jan 7, 2019 by daldhprabhdeepsingh

1 answer

Simplify the expressions and find the value if x is equal to 2. x + 7 + 4 (x – 5)

answered Nov 28, 2018 by ravisjha64

1 answer

Subtract $-5y^2 - 4y + 5$ from the sum of $-4y^2 - 3y + 5$ and $3y^2 + 5y - 3$, and find its value when $y = 2.$

answered Aug 25, 2016 by pady_1

1 answer

Sonia had some bats, she gave y bats to her friends. If 4 bats are remaining with her, how many bats she had earlier ?

answered Aug 25, 2016 by pady_1

1 answer

Kim is 3 times as old as her cousin. The total of their ages is 36 years. How old is Kim's cousin?

answered Aug 25, 2016 by pady_1

1 answer

The number of children at the library was 3 times the number of adults. The total number of people at the library was 48. How many children were at the library.

answered Aug 25, 2016 by pady_1

1 answer

Jill sold half of her comic books and then bought sixteen more. She now has 36. With how many did she begin?

answered Aug 25, 2016 by pady_1

1 answer

Sarah babysat 7 times as many hours during summer break as she did during spring break. She babysat a total of 56 hours during both breaks. How many hours did Sara babysit during spring break?

answered Aug 21, 2016 by pady_1

1 answer

331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were in each bus.

answered Aug 21, 2016 by pady_1

1 answer

Mark had some money. He gave half of that to his brother and then he gave another $5$ to his sister. He now has $20$. How much money Mark had in the beginning?

answered Aug 21, 2016 by pady_1

1 answer

In a school 36% students are girls. If there are 364 less girls than boys. Find total number of students in the school.

answered Aug 21, 2016 by pady_1

1 answer

Bala had some packs of cards (each pack contains 7 cards). He gave away 22 cards to his friend Aditya. If a is the number of packs Bala originally had, how many cards are left with Bala ?

answered Aug 21, 2016 by pady_1

1 answer

Sum of digits in a two digit number is 7. If 9 is added to the number, digits of the number are interchanged. Find the new number.

answered Aug 21, 2016 by pady_1

1 answer

An amount of Rs. 21000 is made up of Rs. 100, 50, 20 and 10 notes. The number of Rs.10 notes are 5 times the number of Rs.20 notes. The number of Rs.20 notes are 5 times the number of Rs.50 notes. The number of Rs.50 notes are 5 times the number of Rs.100 notes. How many Rs.20 notes are there?

answered Aug 21, 2016 by pady_1

1 answer

Solve the equations to find value of variable in equation $-3( -3b - 1) + 2(3b + 2) = - (3b + 47)$

answered Aug 21, 2016 by pady_1

1 answer

Maria had some boxes and she bought seven more boxes. A week later half of all her boxes were destroyed in a fire. There are now only 22 boxes left. With how many did she start?

answered Aug 21, 2016 by pady_1

1 answer

If * be an operation such that $cd = cd(c-d)^2$,then $43$ equals ________

answered Aug 21, 2016 by pady_1

1 answer

The dimensions of rectangular field are 9x - 4 and 8x + 3 units respectively. The value of x for which it would be square is

answered May 9, 2016 by akhila.janagam

1 answer

7th grade has collected $200 for a field trip that would cost at least $600. The teachers decided to ask $50 from additional students to cover the cost. How many students must pay to cover the cost?

asked Oct 14, 2015 by pady_1

0 answers

The sum of three consecutive numbers is 72. What is the smallest of these number?

asked Oct 14, 2015 by pady_1

0 answers

You bought a magazine for $5 and four erasers. You spent a total of $25. How much did each eraser cost?

asked Oct 14, 2015 by pady_1

0 answers

Evaluate the expression −9+\large\frac{n}{2}−5n using n=4

asked Oct 14, 2015 by pady_1

0 answers

Add: 14x + 10y – 12xy – 13, 18 – 7x – 10y + 8xy, 4xy

asked Oct 14, 2015 by pady_1

0 answers

What is the value of x that make this statement true? 4x+15=2x+63

asked Oct 14, 2015 by pady_1

0 answers

What should be added to x^2 + xy + y^2 to obtain 2x^2 + 3xy?

asked Oct 14, 2015 by pady_1

0 answers

Find the value of 100 - 10x^3 for x = 2.

asked Oct 14, 2015 by pady_1

0 answers

Simplify these expressions and find their values, if x = 3, a = – 1, b = – 2. 3x – 5a – x2+ 9b

asked Oct 14, 2015 by pady_1

0 answers

Simplify combining like terms: 3a – 2b – ab – (a – b + ab) + 3ab + b – a

asked Oct 14, 2015 by pady_1

0 answers

Aliyah had $24 to spend on seven pencils. After buying them she had $10. How much did each pencil cost?

asked Oct 14, 2015 by pady_1

0 answers

What should be taken away from 3x^2 – 4y^2 + 5xy + 20 to obtain – x^2 – y^2 + 6xy + 20?

asked Oct 14, 2015 by pady_1

0 answers

What is the correct solution for x in the following equation: 5x+11=41

asked Oct 14, 2015 by pady_1

0 answers

What is the value of the expression below when t=2? (7+t)−(t+4)

asked Oct 14, 2015 by pady_1

0 answers

Simplify 2x+3x^2−5x+4−7x^2

asked Oct 14, 2015 by pady_1

0 answers

3x^2 + 4x + 9x + 4x is a,

asked Oct 14, 2015 by pady_1

0 answers

Shilpa transfers apples from one larger box to smaller boxes. When the larger box is emptied, apples fill 4 smaller boxes and still 15 apples remained outside. If the number of apples in each smaller box is x, what was the number of apples in the larger box?

asked Oct 14, 2015 by pady_1

0 answers

Sita had some books, she gave m books to her friends. If 4 books are remaining with her, how many books she had earlier ?

asked Oct 14, 2015 by pady_1

0 answers

Gita is standing in a row. If she is n^{th} from the front and m^{th} from the back, how may people are standing in the row ?

asked Oct 14, 2015 by pady_1

0 answers

The dimensions of rectangular field are 14x - 12 and 11x + 15 units respectively. The value of x for which it would be square is

asked Oct 14, 2015 by pady_1

0 answers

If x = 6, solve 4(4x + 7) + 3(4 + (4 + 7))

asked Oct 14, 2015 by pady_1

0 answers

A number is 13 more than a second number. If the sum of both these numbers is 37, find the first number.

asked Oct 14, 2015 by pady_1

0 answers

Solve the equations to find value of a in equation 0.8a = 0.4

asked Oct 14, 2015 by pady_1

0 answers

What must be added to 2p^2 - 8 to get 3p^2 - 5p - 4.

asked Oct 14, 2015 by pady_1

0 answers

A number is 6 more than a second number. If the sum of both these numbers is 40, find the first number.

asked Oct 14, 2015 by pady_1

0 answers

The difference of two numbers is -42. 2 times the smaller number minus 3 times the larger number gives -137. Which is the larger number?

asked Oct 14, 2015 by pady_1

0 answers

If * be an operation such that ab = ab(a+b)(a-b), then 82 equals ________

asked Oct 14, 2015 by pady_1

0 answers

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