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alina1380 [7]
4 years ago
7

A student answered this story problem. Use estimation to check the student's answer. Lizzie has $49. Her older sister has $184.

How much money do they have altogether? Student's answer: They have a total of $233. Which estimate is correct and was the student's answer reasonable?
Mathematics
1 answer:
Anna35 [415]4 years ago
6 0

Answer:No the student was not right.Neither of the estimations were right because she did not estimate at al.

Step-by-step explanation:

1.Round 49 to the nearest ten: 50.

2.Round 184 to the nearest ten:180.

3.Add 50+180 to get 230.

The student was not right because she did not estimate 49 nor 184.

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Find the distance from point A to the given line.
VMariaS [17]

Answer:

Let's see what to do buddy...

Step-by-step explanation:

_________________________________

Step (1)

To find the distance between the line which formed like :

ax + by + c = 0

and the point which is like :

h =  \binom{m}{n}  \\

we use following equation :

d =  \frac{ |a(m) + b(n) + c| }{ \sqrt{ {a}^{2} +  {b}^{2}  } } \\

_________________________________ Step (2)

y =  - x + 4

x + y - 4 = 0

So ;

a = 1

b = 1

c =  - 4

°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°

A = ( 2 , - 1 )

°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°

So we have :

d =  \frac{ | \: 1(2) + 1( - 1) - 4| }{ \sqrt{ {1}^{2} +  {1}^{2}  } } =  \\

d =  \frac{ |2 - 1 - 4| }{ \sqrt{1 + 1} } =  \frac{ | - 3| }{ \sqrt{2} }  \\

d =  \frac{3}{ \sqrt{2} } \\

_________________________________

And we're done.

Thanks for watching buddy good luck.

♥️♥️♥️♥️♥️

5 0
4 years ago
A rectangle has a length 6 meters longer than double the width. The perimeters is i44 meters. Find the dimensions of the rectang
Oksana_A [137]
Use the information to form an equation
x = width
x + 6 = length
perimeter = length + length + width + width
x + x + x + 6 + x + 6 = 44
4x + 12 = 44
4x = 32
x = 32/4
x = 8
width = 8 meters
length = 8 + 6 = 14 meters
8 0
3 years ago
A blue whale traveled 31 1/2 miles in 2 1/4 hours. What was the whales rate in yards per hour ( 1 mile = 1,760 yards
tekilochka [14]

Answer: 25594.018691648 yards per hour

3112÷214=14.5420560748

14.5420560748×1760=25594.018691648

Step-by-step explanation:

6 0
3 years ago
If F(x) = x² + 5x and G(x) = 2x + 1, find F(5) + G(6).
kondor19780726 [428]
F(x) = x^2 + 5x
F(5) = 5^2 + 5(5)
F(5) = 25 + 25
F(5) = 50

G(x) = 2x + 1
G(6) = 2(6) + 1
G(6) = 12 + 1
G(6) = 13

F(5) + G(6) = 50 + 13 = 63 <==
7 0
4 years ago
NO LINKS!! Please help me with this trig function problem.​
elena-s [515]
  • Phase shift=0.89-0.66=0.23

You just need a slight idea about phase shift of waves .And it's just similar like that

3 0
2 years ago
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