Brian made a proportional copy of a figure by multiplying each side length by

Mathematics

1 answer:

puteri [66]2 years ago

7 0

Answer:

For side d, original length, the answer is 9

For side d, original length/copy length, the answer is 3

For side e, copy length, the answer if 7

For side f, copy length, the answer is 8

Step-by-step explanation:

For side d, because there's a limited number of options, you need to find what could be divided evenly and still produce an answer that could be an option. The copy length is 3 and the only options that could be divided evenly is 9, 6, and 3. Dividing these you get

9/3=3

6/3=2

3/3=1

Since there isn't an option for 2 and 1, it has to be 9 for the original length and 9/3=3, 3 being the other choice.

For the last 2, you need to find what numbers makes 21 and 24 divide into 3 which is:

21/7=3
24/8=3

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Katy buys ‘x’ cakes.

Viktor [21]

Answers:
Katy bought 12 cakes
Gugu bought 36 cakes
Deanna bought 14 cakes

Explanation:
We are given that:
Katy bought x cakes
Gugu bought 3 times as many as Katy. This means that Gugu bought 3x cakes
Deanna bought 2 cakes more than Katy. This means that Deanna bought x+2 cakes

Total number of cakes bought = x + 3x + x + 2 = 5x + 2 cakes

We know that the price of each cake is 85 p = £0.85 and that the total amount paid is <span>£52.7
This means that:
(5x+2)(0.85) = 52.7
4.25x + 1.7 = 52.7
4.25x = 52.7 - 1.7
4.25x = 51
x = 51 / 4.25
x = 12

Now, we will get the number of cakes that each bought as follows:
Katy bought x cakes = 12 cakes
Gugu bought 3x cakes = 3(12) = 36 cakes
Deanna bought x+2 cakes = 12 + 2 = 14 cakes

Hope this helps :)</span>

5 0

3 years ago

The difference between 5 and a certain number is divided by 3. find the number if is equal to 7.

alukav5142 [94]

Answer:

x=-16

Step-by-step explanation:

Ler the number be x.

Now we have,

$(5-x)/3=7\\5-x=21\\5-21=x\\x=-16$