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Artemon [7]
3 years ago
9

Which best describes the error in Laura’s work

Mathematics
1 answer:
Nadya [2.5K]3 years ago
7 0
Where the picture or numbers at?

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Ali, Carrie and Bryan received a sum of money. Bryan's money was 3/5 as much as Ali's money. The ratio of Ali's money to Carrie'
monitta

Answer:

The sum of money received by Ali, Carrie and Bryan is $ 740.

Step-by-step explanation:

At first we translate mathematically each sentence:

(i) <em>Ali, Carrie and Bryan received a sum of money. </em>

a - Ali's money.

b - Bryan's money.

c - Carrie's money.

(ii) <em>Bryan's money was </em>\frac{3}{5}<em> of  Ali's money</em>.

b = \frac{3}{5}\cdot a (1)

(iii) <em>The ratio of Ali's money to Carrie's money was 4 : 1</em>.

\frac{a}{c} = 4 (2)

(iv) <em>Ali had $ 160 more than Bryan</em>.

a = b + 160 (3)

After some algebraic handling, we have the following system of linear equations:

3\cdot a - 5 \cdot b = 0 (1b)

a - 4\cdot c = 0 (2b)

a - b = 160 (3b)

The solution of the system is: a = 400, b = 240, c = 100

The sum of money is:

s = a + b + c

s = 740

The sum of money received by Ali, Carrie and Bryan is $ 740.

4 0
3 years ago
1. What is the slope of a line containing the points (3,5),(4,7), and (5, 9)?
77julia77 [94]

Answer:

y=2x-1

Step-by-step explanation:

8 0
3 years ago
What is the size of angle p ?
Natasha2012 [34]

Answer:

55˚

Step-by-step explanation:

1. ∡135˚ = 180-135=45˚

2. p=180-80-45

3. p=55˚

5 0
2 years ago
Read 2 more answers
9. If the area of square 1 is 250 units?, and the area of square 3 is
Aleks [24]

Answer:

185 units.

Step-by-step explanation:

So first, I subtracted: 250 - 120 = 130

I divided 130 by 2. I got 65.

I subtracted 65 from 250 and I got 185.

Proof it is correct:

185 - 120 = 65

AND

250 - 185 = 65

--

5 0
2 years ago
Which set of three angles could represent the interior angles of a triangle?
ratelena [41]

The 3 angles need to equal 180 when added together:

A) 49 + 59 +72 = 180

The others do not equal 180

8 0
3 years ago
Read 2 more answers
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