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Cloud [144]
3 years ago
14

In 2008, $1.00 u.s. bought 8.24 chinese yuan and in 2010 it bought 6.64 chinese yuan. how many u.s. dollars could 1 chinese yuan

purchase in 2008 and 2010?
a. 2008: .12 u.s. dollars; 2010: .15 u.s. dollars
b. 2008: 1.2 u.s. dollars; 2010: 1.5 u.s. dollars
c. 2008: .82 u.s. dollars; 2010: .66 u.s. dollars
d. 2008: .15 u.s. dollars; 2010: .11 u.s. dollars
Mathematics
1 answer:
VMariaS [17]3 years ago
6 0
2008:

1d = 8.24y

1d/8.24 = 8.24y/8.24

0.12d = 1y

2010

1d = 6.64y

1d/6.64 = 6.64y/6.64

0.15d = 1y

Answer: 2008: US$0.12; 2010: US$0.15
Answer is choice A.
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3 years ago
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(05.02 MC) A system of equations is shown below: 4x = −3y + 17 3x − 4y = −6 What is the solution to this system of equations? (−
aliina [53]
4x=-3y+17 becomes 4x+3y=17

4x+3y=17
3x-4y=-6

alrighty

elimination

muliply first equation by 4 and 2nd by 3 and add them
16x+12y=68
9x-12y=-18
add them

25x+0y=50
25x=50
idivide both sides by 25
x=2

sub back

3x-4y=-6
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(x,y)
(2,3)
5 0
3 years ago
Read 2 more answers
Simplify 3/15 - 2/25
Alik [6]
Make the denominators equal by multiplying them:
\frac{18}{75}  -  \frac{6}{75}
Subtract:
\frac{12}{75}
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\frac{4}{25}
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\frac{4}{25}
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4 0
3 years ago
Solve your equation using trail and improvement. A number plus ten times its square root is is equal to one thousand
Alex

Answer:

x \approx 729

Step-by-step explanation:

Given

Let the number be x

So:

x + 10\sqrt x = 1000

Required

Using trial and improvement, find x

This implies that we keep guessing the values of x until we get a value that match the equation.

Let

x = 625

So, we have:

x + 10\sqrt x = 1000

625 + 10 *\sqrt{625}

Take the square root of 625

625 + 10 *\sqrt{625} = 625 + 10 *25

625 + 10 *\sqrt{625} = 625 + 250

625 + 10 *\sqrt{625} = 875

Let

x = 729

So, we have:

x + 10\sqrt x = 1000

729 + 10 * \sqrt{729}

Take the square root of 729

729 + 10 * \sqrt{729} = 729 + 10 * 27

729 + 10 * \sqrt{729} = 729 + 270

729 + 10 * \sqrt{729} = 999

At this point, we can conclude that x is approximately 729 because

999 \approx 1000

So:

x \approx 729

5 0
3 years ago
Find 3 1/6 + (-4 1/3).
jeka94

Answer:

-1 1/6

Step-by-step explanation:

3\frac{1}{6} + (-4\frac{1}{3} )

Convert the mixed numbers into improper fractions

\frac{19}{6} + (-\frac{13}{3} )

Apply the rule: a + (-b) = a - b

\frac{19}{6} + (-\frac{13}{3} ) = \frac{19}{6} - \frac{13}{3}

The Least Common Multiplier of 6 and 3 is 6

Adjust the fractions on the LCM

\frac{19}{6} - \frac{26}{3}

Apply the Fraction Rule: \frac{a}{c} -\frac{b}{c} = \frac{a - b}{c}

\frac{19 - 26}{6}

Subtract the numbers

\frac{-7}{6}

Apply the Fraction Rule: \frac{-a}{b} = - \frac{a}{b}

-\frac{7}{6}

Convert improper fraction into a mixed number

-1\frac{1}{6}

Hope this Helps :)

3 0
2 years ago
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