MATHEMATICS MIDDLE SCHOOL

A knife is three times the cost of a spoon.9 spoons and 12 knives cost £82.80.
Work out the cost of 1 knife

Answers

Answer 1
Answer:

Answer:

cost of knife = £5.52

Step-by-step explanation:

Assume:

Cost of Knife = a

Cost of Spoon = b

a = 3b   ----------------------(1)

12a + 9b = £82.80 -------(2)

Substitute equation (1) in equation (2)

12 * (3b) + 9b = £82.80

36b + 9b = £82.80

45b = £82.80

b = £1.84

Therefore, cost of knife = a = 3 * £1.84 = £5.52
Answer 2
Answer:

Answer: £5.52

Step-by-step explanation: I done this same question as you

Related Questions

Are the ratios 3:7 and 1:2 equivalent
There were 24 boys and 20 girls in a chess club last year. This year the number or boys increased by 25% but the number of girls decreased by 10%. Was there an increase or decrease in overall membership?
What is the greatest common factor of 27,45,63 and then 24 40 64
What is the difference between a prime number and a complex number?
Pleas please help! Solve for d. 3/15 - d/5 = 5/6 + d/3

Luke has 27 lots for sale. Each lot is 0.57 acres . How much land does Luke have for sale?

Answers

Multiply 0.57 and 27 together to get 15.39 acres

Solve for x: 900=6x²=3x

Answers

answerIgotwas[3/36]

hope this helps. but I'm not really sure

Wilma used 60 centimeters of lace to make a border around a rectangular card. The width of the card is 20 centimeters. What is the length of the card?

Answers

60 - (20 + 20)= 20
20

An angle measures 64° more than the measure of a complementary angle. What is the measure of each angle?

Answers

Complementary angles are 90 degrees,so if the angle is 64 degrees more,you just only have to add 90+64=154.

The measure of the angle is 154 degrees

Hope i helped.

Remember:complimentary angles add up to 90 while supplementary angles add up to 180.

Final answer:

The two angles are 13 degrees and 77 degrees respectively. Since they are complementary, they add together to make a total of 90 degrees.

Explanation:

In this question, we are seeking the measure of two angles. These angles are complementary, meaning together they add up to 90 degrees. Let's denote the first angle as 'x' and the second angle (which is 64 degrees more than the first) as 'x+64'.

Since they are complementary, this indicates that:

x + (x + 64) = 90

This simplifies into:

2x + 64 = 90

We can then subtract 64 from both sides, giving:

2x = 90 - 64, so 2x = 26

Therefore, if we divide both sides by 2 to isolate 'x', we get:

x = 13

So, the first angle measures 13 degrees. The second angle, as specified in the question, is 64 more than the first angle, so it measures:

x + 64 = 13 + 64 = 77 degrees

Result:

The first angle measures 13 degrees and the second angle measures 77 degrees.

Learn more about Complementary Angles here:

brainly.com/question/15592900

#SPJ12

Which answer describes the simpler problems that could be used to solve this story problem? Wendy's sister had $12 and Wendy had twice as much money as her sister. Wendy spent $4 at the market and $3 at the newspaper store. How much money did Wendy have left?







A.
Calculate how much money Wendy has to start with. Add up the money she spent. Add the amount Wendy spent to the amount she started with.





B.

Calculate how much money Wendy spent. Add this to the number of items she bought. Subtract this sum from the amount of money Wendy's sister has.






C.
Calculate how much more money Wendy had than her sister Add up the money Wendy spent. Subtract the two amounts.





D.

Calculate how much money Wendy has to start with. Add up the money she spent. Subtract the amount Wendy spent from the amount she started with.

Answers

C. 
Calculate how much more money Wendy had than her sister Add up the money Wendy spent. Subtract the two amounts. 

In your class, 2 out of every 20 students are left-handed. What percent of students in your class are left handed?

Answers

(left-handet)/(all students) = (2)/(20) = (10)/(100) =10%

Answer : 10%

Hey, Tyty1235!

2/20=left handed

1/10=left handed

1*10

10*10

10/100=10%

I really hope this helps;)
Other Questions
Alex spent 25% of his money on a sports drink. Then he spent 25% of the remaining money on trail mix. He has $9 left. How much money did Alex begin with?
Help me i don't understand the problem
The Valdez family left at noon for a 4-hour trip to visit relatives. They stopped 1 hour for lunch and 2 hours to visit an amusement park. What time did they get to their relatives' house?
Expand the brackets and simplify a. 5(x+4) + 2(x+3)b. 3(y+6) + 4(y-5)​