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lubasha [3.4K]
3 years ago
9

Round 1,129.872 to 2 decimal places

Mathematics
2 answers:
Novay_Z [31]3 years ago
6 0
It's 1129.87 the two rounds down

gulaghasi [49]3 years ago
4 0
The answer is 1,129.87
If you need to round to 2 decimal places you want two numbers after the decimal point. 

<em>If you were to have the number 1,129.875 and you wished to round to two decimal places the third number after the decimal tells you whether it will round down or up. If the third number after the decimal point is equal to 5 or more the number before it (in this case the second number after the decimal point) will increase by one. For this example 1,129.875 to two decimal places is 1,129.88. </em>
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HELP QUICK PLEASE! THANKS
Helen [10]
Seven more than a number
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Find the range for the measure of the third side of a triangle if the measures of the two sides are 23 meters &amp; 39 meters.
Gnoma [55]
The third side must be greater than 16 and less than 62
The answer is b
Source:
http://www.1728.org/trianinq.htm



5 0
3 years ago
Write an equation of the line that passes through (-4,1) and is perpendicular to the
trasher [3.6K]

Answer:

line1:y=2x+3

Gradient1=2

Let line2 be the line passes through (-4,1)and perpendicular to line1.

Because line2 and line1 are perpendicular, (gradient of line2) (gradient of line1) =-1

Gradient of line2=-1/2

Equation of line2:y-y1 =m(x-x1)

:y-1 =(-1/2)[x-(-4)]

:(y-1)(-2)=(x+4)

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:-2y+2-x-4=0

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:x+2y+2 =0

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3 0
3 years ago
Paul and jose are trying to measure the height of a tree. paul is standing 19m from the foot of the tree and measures the angle
Nina [5.8K]
The firts thig we are going to do is create tow triangles using the angles of elevation of Paul and Jose. Since the problem is not giving us their height we'll assume that the horizontal line of sight of both of them coincide with the base of the tree.
We know that Paul is 19m from the base of the tree and its elevation angle to the top of the tree is 59°. We also know that the elevation angle of Jose and the top of the tree is 43°, but we don't know the distance between Paul of Jose, so lets label that distance as x.
Now we can build a right triangle between Paul and the tree and another one between Jose and the tree as shown in the figure. Lets use cosine to find h in Paul's trianlge:
cos(59)= \frac{19}{h}
h= \frac{19}{cos(59)}
h=36.9
Now we can use the law of sines to find the distance x between Paul and Jose:
\frac{sin(43)}{36.9} = \frac{sin(16)}{x}
x= \frac{36.9sin(16)}{sin(43)}
x=14.9

Now that we know the distance between Paul and Jose, the only thing left is add that distance to the distance from Paul and the base of the tree:
19m+14.9=33.9m

We can conclude that Jose is 33.9m from the base of the tree.

3 0
3 years ago
Sean's car used 8 gallons of gasoline to travel 340 miles. After a mechanic worked on the car, it used 7 gallons of gasoline to
Olin [163]
7 gallons of gasoline=350 miles
1 gallon of gasoline=50 miles
0.02 gallons =1 mile
4.00×0.02=0.08 cents per mile
4 0
3 years ago
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