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Goshia [24]
3 years ago
7

Mr. Rich has 75 papers. He graded 60 papers, and he had a student teacher grade the rest. What percent of the papers did each pe

rson grade?
Please help me ASAP
Mathematics
2 answers:
WINSTONCH [101]3 years ago
8 0
The Answer is Mr.Rich:80 percent Student: 20 percent
myrzilka [38]3 years ago
7 0

Answer:

Mr. Rich did 80% and the student did 20%

Step-by-step explanation:

60/75 = 80%

15/75 = 20%

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A rhombus has four 6-inch sides and two 120-degree angles. From one of the vertices of the obtuse angles, the two latitudes are
nikitadnepr [17]

Answer:

Area(A)=Area(C)= 9 in^{2}

Area(B)=13.2 in^{2}

Step-by-step explanation:

We begin with finding the angles a and b that from the drawing attached you can see that a=b.

Now, the sum of the internal angles of a rhomboid is equal to 360 degrees, with that we have:

120+120+a+b=360

240+2a=360

2a=120

a=60=b

Next, in the image you can see that the lines coming from the angle at the top 120 degrees vertex, divide the opposite sides by half, thus making two triangles with one side of 6 in and another of 3 in.

We can say from the drawing as well:

Area(A)+Area(B)+Area(C)=Area(rhomboid)

But, we can also say that Area(A)=Area(C)

So, starting with Area(A)

Area(A)=Area(triangle)=\frac{b*h}{2}=\frac{6*3}{2}=9 in^{2}

We can then calculate the area B, a rhomboid, or better, take the Total area of the figure and subtract the area of the two triangles.

Area(B)=Area(rhomboid)-Area(A)-Area(C)

Area(rhomboid)=b*h where b=6in and h is the perpendicular distance from the base to the top.

h=[tex]6*cos(30)=5.20in   The 30 degrees come from: 120-30-60=30, since the latitudes split the 120 angle in two equal parts and one that is the half of the obtuse angle.

Area(rhomboid)=5.20*6=31.2 in^{2}

Area(B)=Area(rhomboid)-Area(A)-Area(C)=31.2 in^{2}-9 in^{2}-9 in^{2}=13.2 in^{2}

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3 years ago
Subtract.<br> 5x – 6x+2<br> - 1-2x - x - 2)
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Answer:

7x^2 -5x + 4

Step-by-step explanation:

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We got 5x^2 - (-2x^2) = 5x^2 + 2x^2 = 7x^2

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2 - (-2) = 2+2 = 4

So the equation would be 7x^2 -5x + 4

Hope this help :3

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3 years ago
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r-ruslan [8.4K]

Answer:

<h2>(3,-5)</h2>

Step-by-step explanation:

(4,4)

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(4,-5)

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