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fredd [130]
2 years ago
7

Can someone help me pleaseee

Mathematics
1 answer:
slavikrds [6]2 years ago
7 0

Answer:

£13,831.72

Step-by-step explanation:

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Solve 5 ÷ 2 5/7<br><br>10 5/7 <br><br>13 1/2 <br><br>1 8/9<br><br>1 16/19<br><br>​
aivan3 [116]

1) 1.7857142857

2) 7.142857143

6 0
3 years ago
Sarah has a brother who is 5 years younger than herself and another brother who is 8 years younger than herself. She observes th
ELEN [110]

Answer:

Sarah is 13 years old

Step-by-step explanation:

Represent Sarah's age with S

Her first brother's age with F

Her second brother's age with B

So, we have:

From the first statement, we have:

S - F = 5 ---- (1)

From the second, we have:

S - B = 8 ---- (2)

The product of their ages is 40.

First, we make F the subject in (1) and B the subject in (2)

F = S - 5

B = S - 8

Their product is represented as follows:

F * B = 40

Substitute values for F and B

(S - 5) * (S - 8)=40

Open bracket

S^2 - 5S -8S + 40 = 40

S^2 - 13S + 40 = 40

Subtract 40 from both sides

S^2 - 13S = 0

Factorize:

S(S - 13) = 0

Split:

S = 0 or S - 13 = 0

But Sarah's age can't be 0 because she has two younger brothers.

So, we stick to

S - 13 = 0

Make S the subject

S = 13

<em>Hence, Sarah is 13 years old</em>

3 0
3 years ago
Question 9<br><br> .....................................................................
egoroff_w [7]

Answer:

your answer is D (6.72)

Step-by-step explanation:

substitute x by 4

y = 2.76(4) - 4.4

y = 11.12 - 4.4

y = 6.72

Therefore the option D (6.72) is the correct answer

- hope this helps, if it does click the thanks button to let me know :) -

- have a nice day, be safe & healthy -

6 0
2 years ago
If x varies inversely as y and x=12 when y=9, find x when y=54
beks73 [17]

Answer:

x = 72

Step-by-step explanation:

We set the two equal to each other

x = 12/y = 9 is equal to x/y = 54.

In order for 9 to get to 54, you have to multiply it by 6. Since you multiplied the denominator with 6, you have to do the same with the numerator. 12 times 6 is 72.

x = 72

3 0
3 years ago
What is the value of 4 to the power of 6 over 4 to the power of 8?
Angelina_Jolie [31]
The answer is 1/16

in decimal form its 0.0625

in percentage form its 6.25%
4 0
3 years ago
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