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alexdok [17]
3 years ago
9

The staff of a school cafeteria makes 86 sandwiches for the students trip. if n represents the number of sandwiches that were ea

ten by the students which expression represents the number of sandwiches eaten
a. n-86
b. 86n
c. 86-n
d. 86+n
Mathematics
1 answer:
Nesterboy [21]3 years ago
6 0

Answer:

c

Step-by-step explanation:

You had 86 then you eat n. You are subtracting.

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Sam wants to enlarge a triangle with sides 3, 6 and 6 inches. If the shortest side of the new triangle is 13 inches, how long wi
nadezda [96]
The other sides will be 16 inches long, because 13-3=10, and 10+6=16
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3 years ago
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HELP MARKING BRAINLIEST EXTRA POINTS !!
Scrat [10]

Answer:

  • The quadrilateral is a rectangle
  • Perimeter=8\sqrt{2} \,\,Unit
  • Area=6\,\,sq.unit

Step-by-step explanation:

Given,

A=(0,0)\\B=(1,1)\\C=(4,-2)\\D=(3,-3)

Now,

Slope\,\,for\,\,AB=\frac{1-0}{1-0} =1\\\\Slope\,\,for\,\,CD=\frac{-3+2}{3-4} =1\\\\Slope\,\,for\,\,AD=\frac{-3-0}{3-0} =-1\\\\Slope\,\,for\,\,BC=\frac{-2-1}{4-1} =-1\\\\So,AB||CD\,\,and\,\,AD||BC

AB=\sqrt{(1-0)^2+(1-0)^2}=\sqrt{2}\\BC=\sqrt{(4-1)^2+(-2-1)^2}=3\sqrt{2}\\CD=\sqrt{(3-4)^2+(-3+2)^2}=\sqrt{2}\\AD=\sqrt{(3-0)^2+(-3-0)^2}=3\sqrt{2}\\\\So,\,\,AB=CD,AD=BC\\The\,\,quadrilateral\,\,is\,\,a\,\,rectangle

Perimeter=2*(AB+AD)=2*(BC+CD)\\=2*(\sqrt{2}+3\sqrt{2})=8\sqrt{2} \,\,Unit

Area=AB*AD=BC*CD=\sqrt{2} *3\sqrt{2}=6\,\,sq.unit

Hope you have understood this.....  

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5 0
3 years ago
Olivia is making a triangular pyramid model for math class. The triangular base has a height of 5 inches and a base of 8 inches.
Vesna [10]

Answer:

66.7 in^3

Step-by-step explanation:

The volume of a triangular pyramid is given by

V = 1/3 B h

where B is the area of the base and h is the height

Calculate the area of the base.  The base is a triangle

B = 1/2 bh  where b is 8 and h is 5

  = 1/2 (8) * 5

  =20

V = 1/3 (20) 10

 66.6666666

To the nearest tenth

66.7 in^3

7 0
3 years ago
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I need help answering this question thank you
RideAnS [48]
It’s c hope it helps
4 0
3 years ago
How do you do this question?
vaieri [72.5K]

Answer:

(-∞, -2), (-2, -0.618), and (1.618, 3)

Step-by-step explanation:

The red plus (+) signs indicate the regions in which the function is concave up, and the red negative (-) signs indicate the regions in which the function is concave down.

Note that the sign of the concavity changes at an inflection point.

Let's examine the intervals given.

(-∞, -2): Yes, concave up.

(-∞, -1.17): No. Concave up in (-∞, -2) but concave down in (-2, -1.17).

(-2, 0): No. Concave down in (-2, -1.17) but increasing in (-1.17, 0.0).

(-1.17, 0.689): Yes. Concave up.

(-0.618, 1.618): No. Concave up in (-0.618, 0.689) but concave down in (0.689, 1.618).

(0, 3): No. Concave up in (0, 0.689), concave down in (0.689, 2.481), and concave up in (2.481, 3).

(2.481, ∞): Yes. Concave up.

The three intervals that are concave up are (-∞, -2), (-1.17, -0.689), and (2.481, ∞).

4 0
3 years ago
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