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borishaifa [10]
3 years ago
8

How to solve it don't understand a thing

Mathematics
1 answer:
sashaice [31]3 years ago
5 0

Answer:

1) 40ft^2

2)320mm^2

3) 96m^2

Step-by-step explanation:

first one

find the area of the bigger rectangle (80)

find the area of the inner rectangle (40)

subtract the bigger one from the smaller one(80-40=40)

shaded area is 40ft^2

second one

find the area as if it were a rectangle(720 cm)

find the area of the inner(400cm)

subtract the bigger from the smaller(720-400=320)

answer: 320mm^2

third

find area of the big square(196)

find area of one tiny unshaded square(25)

since all are the same 25x4 is 100

196-100=96

answer;96m^2

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Answer:

8

Step-by-step explanation:

the degree is the highest exponent value

8 0
3 years ago
1.03x+ 3.97x-5=13 solve for x.
ziro4ka [17]

Answer:

X = \frac{18}{5}, or X = 3.6

Step-by-step explanation:

For this problem we must isolate x

1.03x+3.97x-5=13 | Add 5 to both sides

1.03x+3.97x=18 | Add the x's

5x=18 | Now divide both sides by 5

x=\frac{18}{5}, x=3.6

3 0
3 years ago
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What is the surface area of a box that is 20.1 m long, 6.8 m wide and 7.4 m high?
blsea [12.9K]

Answer:

Surface area of the box is =671.48m^2

Step-by-step explanation:

The box is in the shape of a cuboid:

Surface area of the cuboid = 2(L*W+W*H+H*L)

Length(L)=20.1 m

Width(W)=6.8 m

Height(H)=7.4 m

Surface area:

                 2((20.1*6.8)+(6.8*7.4)+(7.4*20.1))\\\\=2(136.68+50.32+148.74)\\\\=2(335.74)\\\\\=671.48m^2\\\\

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6 0
4 years ago
Write the function for the graph below
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3 years ago
HELP ME FAST. I’ll give thanksss. please i’m lost
Fudgin [204]

9514 1404 393

Answer:

  24°

Step-by-step explanation:

The angle between the vertical line AB and the horizontal dashed line at A is 90°. That is, ...

  66° + ? = 90°

  ? = 90° -66° = 24°

The angle of depression is 24°.

_____

<em>Additional comment</em>

The sum of angles in the triangle is 180°, so the angle at C (the angle of elevation) is the same as the angle we just figured:

  ∠C + 90° +66° = 180°

  ∠C +66° = 90° . . . . . . . subtracting 90°; shows C is complementary to 66°

  ∠C = 90° -66° = 24°

As a rule, the angle of elevation and the angle of depression are the same.

8 0
3 years ago
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