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KatRina [158]
4 years ago
13

Van was asked to add 46 to 37 and round the result to the nearest ten. He figured that since he was going to have to round anywa

y, he might as well do it before adding the numbers. He rounded 46 to 50 and 37 to 40, thus getting an answer of 50+40=90. This answer is not correct. What is the correct answer?
Mathematics
2 answers:
gulaghasi [49]4 years ago
6 0

Answer:

80

Explanation:

46 + 37 = 83 so 83 rounded to the nearest 10 is 80

vitfil [10]4 years ago
6 0

Answer:

80

Step-by-step explanation:

46+37 = 83

Rounding to the nearest ten

80

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A classmate plotted the following points:
irga5000 [103]

Answer:

D(-1,0)

Step-by-step explanation:

Plot points A(-3, 2), B(-1, 4), and C(1, 2) on the coordinate plane (see attached diagram).

Two sides AB and BC are of equal length and are perpendicular, because

AB=\sqrt{(-3-(-1))^2+(2-4)^2}=\sart{(-2)^2+(-2)^2}=\sqrt{4+4}=2\sqrt{2}\ units\\ \\BC=\sqrt{(-1-1)^2+(4-2)^2}=\sart{(-2)^2+2^2}=\sqrt{4+4}=2\sqrt{2}\ units\\ \\\text{Slope AB}=\dfrac{4-2}{-1-(-3)}=\dfrac{2}{2}=1\\ \\\text{Slope BC}=\dfrac{2-4}{1-(-1)}=\dfrac{-2}{2}=-1\\ \\\text{Slope AB}\cdot \text{Slope BC}=1\cdot (-1)=-1\Rightarrow \text{lines AB and BC are perpendicular}

If the quadrilateral ABCD has all sides perpendicular, then ABCD is a square. The diagonals of the square bisects each other. Find the coordinates of the point of intersection of these diagonals. This is the midpoint of segment AC:

x=\dfrac{-3+1}{2}=-1\\ \\y=\dfrac{2+2}{2}=2

If point O(-1,2) is the point of intersection of diagonals, then it is the midpoint of the diagonal BD. Find coordinates of point D:

x_O=\dfrac{x_B+x_D}{2}\Rightarrow -1=\dfrac{-1+x_D}{2},\ -1+x_D=-2,\ x_D=-1\\ \\y_O=\dfrac{y_B+y_D}{2}\Rightarrow 2=\dfrac{4+y_D}{2}, 4+y_D=4,\ y_D=0

Thus, D(-1,0)

7 0
4 years ago
Pretend you have a sibling who is two years younger than you. He/she hears you working on triangle similarity and wants to know
taurus [48]

Two triangles are similar if they are the same, except one is bigger and one is smaller. Also, their angles are all the same. A career that uses similar triangles could be a mathematician, or a math teacher. Both of these need to be able to understand simple concepts like similar triangles to teach to their victims.

5 0
3 years ago
Write an ordered list of five numbers whose value are between 50.98 and 51.6
Katyanochek1 [597]

51, 51.1,51.2,51.3,51.4

5 0
3 years ago
Read 2 more answers
What is the slope of the line<br><br> A.1/2<br><br> B.1<br><br> C.-2<br><br> D.2
Eduardwww [97]
I think the answer is A
4 0
3 years ago
Read 2 more answers
I need help with this I’m marking everyone as brainlest if awnser right
avanturin [10]
C, 85% don’t hav an A

This is correct because it is the exact opposite therefor making it complimentary
6 0
3 years ago
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