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lys-0071 [83]
3 years ago
9

Larry has $20 to spend at the store. He plans to purchase five items that cost $5.79, $7.63, $3.46, $2.99, and $3.65. Larry esti

mated his total cost to make sure he has enough money for his purchases. Is his estimate accurate? Explain why or why not.
$5 + $7 + $3 + $2 + $3 = $20
Mathematics
2 answers:
qwelly [4]3 years ago
7 0
No, because in most of the numbers the number in the tenths place is over 5 so you round up instead of keeping it the same.
oee [108]3 years ago
4 0

Answer:

Larry did not round correctly. He used front-end estimation, but he did not round up when appropriate. His estimate will be lower than the amount of money he needs.

Step-by-step explanation:

now this is the correct answer

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The ratio of the numerator to the denominator of a fraction is 2 to 3. If both the numerator and the denominator are increased b
masha68 [24]

Answer:

The fraction is \frac{4}{6}

Option (B) is correct.

3n-2d=0  and 4n+8=3d+6

Step-by-step explanation:

Let n denotes numerator and d denotes denominator of the fraction.

Given : The ratio of the numerator to the denominator of a fraction is 2 to 3.

That is \frac{n}{d}=\frac{2}{3}

Cross multiply , we get,

3n=2d

Or, 3n-2d=0   ........(1)

Also, given : . If both the numerator and the denominator are increased by 2, the fraction becomes 3/4

That is \frac{n+2}{d+2}=\frac{3}{4}

Cross multiply , We get,

4{n+2}={3}{d+2}

4n+8=3d+6  .........(2)

3d-4n=2  .......(3)

Thus, from (1) and (2) , option (B) follows.

Solving equation (1) and (3) to get the original fraction using elimination method,

3n - 2d = 0    ............(1)

and 3d - 4n = 2       .........(3)

Multiply equation (1) by 3 , we get ,

9n - 6d = 0  ..........(4)

Multiply equation (3) by 2 , we get ,

-8n + 6d = 4 ..........(5)

Adding (4) and  (5) , we get,

9n - 6d -8n + 6d = 4 + 0

⇒ n = 4

Put n = 4 in (1), we get

3n - 2d = 0 ⇒ 3(4) - 2d = 0 ⇒ 12 -2d = 0  ⇒  12 = 2d ⇒ d = 6

so, the numerator is 4 and  the denominator is 6.

Thus, the fraction is \frac{4}{6}


6 0
3 years ago
Complete the coordinate proof.
Lady_Fox [76]

Answer:

j RJ irjcirkcks he ed dew wh he x vhg

Step-by-step explanation:

jrjrirjcjrjifjrjfjjfwodoqldmfjrj

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3 years ago
Work out the y-intercept of the line going<br> through (1, 2) with a gradient of 3
Tasya [4]

I think we need a coordinate grid for that,,

4 0
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Read 2 more answers
Anyone needs help on circumference or area of a circle?
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No circumference of a circle is very easy to me
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A storm moves at a rate of 8 miles per hour. It is 200 miles away from Freeport and headed directly for this town. The equation
Eduardwww [97]

Pls see answer below.

Step-by-step explanation:

In this case, our slope is -8. This means that every hour, the storm is getting closer to the town by 8 miles per hour.

Our y-intercept is 200, which means that its' initial position is 200 miles away from the town.

Hope this helped.

7 0
3 years ago
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