student #1

Joel bought a bag with (2/9) of his money and a pair of shoes which cost $40 more than the bag. He had (1/3) of his money left. a) How much did the bag cost? b) how much did he have at first?

6 years ago

Alvin, Brian and Charlie shared some comics among themselves. Alvin received (2/5) of them while Brian received (5/6) of what he and Charlie received altogether. If Alvin received 180 more comics than Charlie, how many comics did Brian receive?

6 years ago

A bag of durian is (9/5) as heavy as a bag of rambutans. Express the ratio of the mass of rambutans to the mass of durians. The part that I don't understand in this question is: all the question gives out is the fraction amount. That's the only informatio...

6 years ago

A class has 42 pupils. The ratio of the number of boys to the number of girls is 5 : 2. Find the number of boys in the class. My understanding is that in order to find the number of boys, you need to find BOTH genders first, and so I could only get up to...

6 years ago

Hannah is (3/7) as heavy as Irna and (3/4) as heavy as Jiahui. What is the ratio of Hannah's mass to the total mass of the 3 girls?

6 years ago

The ratio of the volume of water in cups A and B is 10 : 7. Express the volume in Cup B as a fraction of the total volume of water in both cups.

6 years ago

Farah made a drink for a party by mixing syrup and water in the ratio 1 : 8. If she made 4.5L of drink, how much syrup did she use?

6 years ago

The sum of half of the square of n and half of n. Write the expression for this description. This is MY answer: (1/n)^2 + 1/n Is this correct?

6 years ago

6xy + xy + 4y My answer is 6xy + 4y Is that correct?

6 years ago

When expanded form, what should -2(x + 3) equal?

6 years ago

Expand and collect like terms: 5 + (3x - 4)

6 years ago

A rectangle's length is 4 more than its width, x. Find an expanded expression for its area.

6 years ago

Jill pays tax at 20c in the dollar for every dollar earned over $10 000. If Jill earns $x and x > 10 000, write an expression for Jill's tax in expanded form.

6 years ago

subtract x from both sides: 3x + 1 = x - 6 subtract 2x from both sides: 4x - 3 = 2x + 1

6 years ago

Solve each of the following equations by first expanding the brackets. a) 4(5 - b) = 18 b) 2(1 - m) = 13 c) 5(3 - x) = 19

6 years ago

Use substitution to solve each of the following pairs of simultaneous equations for x and y in terms of a and b: a) ax + y = b y = bx b) ax + by = b x = by

6 years ago

Mal bought 3 bottles of milk and 4 bags of chips for a total of $17. At the same shop, Barbara bought 1 bottle of milk and 5 bags of chips for $13. Find how much each bottle of milk and each bag of chips cost by completing the following steps: a) Define t...

6 years ago

Carrie has 27 coins in her purse. All the coins are 5 cent or 20 cent coins. If the total value of the coins is $3.75, how many of each type does she have?

6 years ago

Wilfred and Wendy have a long distance bike race. Wilfred rides at 20km/h and has a 2 hour head start. Wendy travels at 28 km’h. How long does it take for Wendy to catch up to Wilfred? To work this problem out, use algebraic form.

6 years ago

Malcolm’s mother is 27 years older than he is and their ages are both two digit numbers. If Malcolm swaps the digits in his age he gets his mother’s age. a) How old is Malcolm if the sum o the digits in his age is 5? b) What is the relationship between th...

6 years ago

What is the growth rate, in percentage, of the amount of money in account B from year 1 to year 2? Justify your answer and show your work.

6 years ago

Solve these simultaneous equations by eliminating: 1) 7x - y = 9 2x + 3y = 19 2) x - 3y = 0 3x + y = 30 3) 7x - y = 19 2x + 3y = 12

6 years ago

Solve this simultaneous equations by substitution: 1) a = 4b + 1 a = 3b - 1

6 years ago

I think of two numbers. If I double the first and add three times the second, the result is zero. If I subtract three times the second from twice the first, the result is -12. Find the two numbers.

6 years ago

I think of two numbers, which I represent by x and y. If I add three times to y to three times x, the result is 7 1/2, while if I subtract three times y from three times x the result is 22 1/2. What numbers do x and y represent? 3x + 3y = 7 1/2 - Equation...

6 years ago

yy + 12 = 28

6 years ago

Five times a certain number exceeds 19 by 6. How do I solve this in algebraic form?

6 years ago

When new, a factory cost $c, but it loses value at the rate of $p a year. Find its value, $V, after n years.

6 years ago

Farmer Giles has 36 sections of portable fence which are used to make pens for the sheep. Each of these sections is 1 metre long. Each night he arranges the sections into a rectangle. Sometimes he makes it long and narrow and sometimes he makes it more li...

6 years ago

What conclusion are you able to draw about the relationship between perimeter of rectangles and the area, which they enclose?

6 years ago

A memorial lawn at the crematorium is square and has an area of 81 square metres. The path around the lawn is 1 metre wide. What is the area of the concrete path which surrounds the lawn?

6 years ago

Major car park has y levels. Each level has n rows and each row has n spaces. The charge for each space is $x per day. The maximum total revenue for each day is therefore...

6 years ago

The area around the rectangular pool is to be paved for a distance of three metres out from the edge of the pool. Each paving block is a square with sides of 0.5 metres. How many blocks needed? In my hw book, the diagram has a rectangle, and the width is...

6 years ago

A builder is to build a staircase up to a landing which is 3 metres from the floor level. Each step rises 20 cm, and the horizontal part of the step goes 25 cm. a) How many steps will he need to build? b) How far from the wall will he need to move to be a...

6 years ago

Peter kept his pony in a rectangular paddock the perimeter of which was 240 metres and the area was 3200 square metres. What were the dimensions of the paddock?

6 years ago

The length of the paving block will determine the perimeter. While there could be a number of different rectangles formed using the same number of blocks the perimeters will not vary; only the area inside the path could vary. Complete the following table....

6 years ago

The Play Park runs between Happy Street and Sad Street. Some drivers are using the park as a short cut. A fencing contractor has been asked to put chains across both ends of the park to stop the cars driving through, but he has not been told how wide the...

6 years ago

A pool is surrounded by paving blocks which are 1 metre square. There are 16 blocks are used to surround the pool. a) What is the perimeter of the pool? b) What are the area of the various pools which could be surrounded by these 16 blocks?

6 years ago

A lion enclosure is made up of five straight fence sections. Three sections are 20 m in length and the other two sections are 15.5 and 32.5 m. Find the perimeter of the enclosure.

6 years ago

A photo 12 cm wide and 20 cm long is surrounded with a picture frame 3 cm wide. Find the outside perimeter of the framed picture.

6 years ago

A pizza shop is considering increasing the diameter of its family pizza tray from 32 cm to 34 cm. Find the percentage increase in area, correct to two decimal places, from the 32 cm tray to the 34 cm tray.

6 years ago

Six square windows of side length 2 m are to be placed into 12 m wide by 8.5 m high wall as shown. The windows are to be positioned so that the vertical spacing between the windows and the wall edges are equal. Similarly, the horizontal spacings are also...

6 years ago

Two wooden boxes, both with dimensions 8080 cm, 11 m and 25 cm, are placed on the ground, one on top of the other as shown. The entire outside surface is then painted. Find the area of the painted surface.

6 years ago

what is the formula to calculate two cylinders, one of them inside the big cylinder?

6 years ago

I know this isn't an ACTUAL learning question but this is urgent for I have an upcoming test... how do you establish the formulas for areas of rectangles, triangles and parallelograms, and use these in problem-solving?

6 years ago

Hi, sorry got your response late I didn't get pretty far. I didn't understand how to apply the same formula to this question

6 years ago

5/6 - Brian (1 half from what BOTH Brian and Charlie received) 2/5 - Alvin Alvin got 180 MORE comics than Charlie To find Charlie's and Brian's amount of comics: 5/6 x 2 = 5/3 So BOTH Charlie's and Brian's amount of comics is 5/3 Alvin received 180 MORE t...

6 years ago

Yes, I believe that works... for you... but I still don't understand the concept Please help... thank you very much

6 years ago

It is easier because the arch structure at either end of the egg is stronger than it's sides. Pressure is distributed up or down (but most commonly down) so that the arches has less pressure that can act on any one point

6 years ago

-2^11v^29

6 years ago

So basically the number of boys is 6? And so is girls??

6 years ago

Oh oops.. sorry.. wrong answer CORRECT ANSWER: -2048v^29

6 years ago

"Musa's arms SWUNG as he walked to school."

6 years ago

Ohhhh I get it So 5x = 5 x 6 = 30 (BOYS) And 2x = 2 x 6 = 12 (GIRLS) So the number of boys is 30 yes?

6 years ago

blue-violet

6 years ago

B. The runaway truck which had been parked on a steep hill swerved and teetered before jumping a curb and slamming into a tree.

6 years ago

This sentence is correct, but you need to add 2 commas: "France, as well as Russia, produces oil."

6 years ago

Yes B should be correct because the question is asking WHAT'S the meaning of the speech

6 years ago

The working out has to be in algebraic form

6 years ago

Can you please put this in algebraic form? I don't understand how to put it into algebraic form.

6 years ago

nevermind... solved it already

6 years ago

For the 9m... is it 9m^2? or just leave it like that?

6 years ago

9m isn't a variable. It represents "metres" not some variable.

6 years ago

So basically... there are different ways to answer this problem? Like... it's an open-ended question?

6 years ago

what original problem?

6 years ago

I just understood that a day ago... thanks to the example you gave me

6 years ago

add the extra 75cm for the top landing (25cm included by thinking of it as a step) what does that mean?

6 years ago

The factors of 32 are 8 and 4, since they add up to 12 anyways.. And so... the factors for 3200 are both 100 and 20 AND 40 and 80

6 years ago

wait.. where did 120metres come from? sorry my head is a bit muddle up today... I would've been able to solve it

6 years ago

yes I have the diagram in my hw book I'm just not sure how to find the perimeter and area the diagram has 4 blocks on each side... so 4 blocks on the top, 4 blocks on both sides, and 4 blocks on the bottom

6 years ago