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nlexa [21]
2 years ago
13

The following week they gave another exam. Tina knows she can grade 60 exams in 2 hours

Mathematics
1 answer:
Stella [2.4K]2 years ago
6 0

Answer:

1 1/6 hours

Step-by-step explanation:

Add them together 2 + 1.5 = 3.5

Multiply them together 2 x 1.5 = 3

Take first number and divide by 2nd 3.5 / 3 = 7/6 or 1 1/6 hours

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Please tell me what this answer is
sdas [7]
Please like this I need pts
7 0
2 years ago
I NEED HELP ASAP PLEASEEEE!!!!!
earnstyle [38]

Answer:

Step-by-step explanation:

Use Pythagorean theorem.

Hypotenuse² = base² + altitude²

5)  x²  = 12² + 6²

         = 144 + 36

  x²  = 180

x = √180

x = 13.42 ft

6) 25² = x² + 19²

625 = x² + 361

625 - 361 = x²

x² = 264

x = √264

x = 16.25 m

7)  x² = 7² + 576

        = 49 + 576

        = 625

x = √625

x = 25 in

8)  2.5² = 2²+ x²

6.25 = 4 + x²

6.25 - 4 = x²

x² = 2.25

x = √2.25

x = 1.5 yd

5 0
3 years ago
Find the area of the shaded region. use 3.14 for pi.
stepan [7]

Answer:

18 0 - 60 = 120 \\  \\  \frac{120}{360}  \times \pi {r}^{2}  \\  \frac{1}{3} \times 3.14 \times 4 \times 4 \\  = 16.75 {u}^{2}

<em>Answer</em><em> </em><em>B</em><em> </em><em>is</em><em> </em><em>correct</em><em>.</em>

8 0
3 years ago
find the missing side of the triangle below. please round your final answer to the nearest tenth. Be sure to show all work! Use
AleksandrR [38]
I believe x=10.25 because of the pythagorean theorem.
5 0
2 years ago
Question 20
Alexxandr [17]

Answer:

The camera had to cover the greatest angle is CAMERA 3 because it had the largest angle of 71.47°

Step-by-step explanation:

From the above question,

We have:

Camera 1 = Angle A

Camera 2= Angle B

Camera 3 = Angle C

A = 210ft

B = 234ft

C = 260ft

We need to find Angle A( angle of camera 1) using the cosine rule

A=(B² + C² - 2BCCosA)

210² = 234² + 260² - 2 × 234 × 260 × CosA

210² = 122356 - 121680CosA

Square both sides

210² = 122356 - 121680CosA

44100 = 122356 - 121680CosA

121680CosA = 122356 - 44100

121680CosA = 78256

Cos A = 78256/121680

Cos A = 0.6431295201

A = arc cos (0.6431295201)

A = 49.974422249°

Angle A approximately = 49.97°

Using the Sine rule to find the Angle B

A/Sine A = B/Sine B

210ft/Sine 49.97° = 234ft/Sine B

210ft × Sine B = 49.97° × 234ft

Sine B =( Sine 49.97° × 234ft)/210ft

B = arc sin (0.8532172354)

Angle B = 58.56334

Approximately = 58.56°

Angle C = 180 - (49.97 + 58.56)°

Angle C = 71.47°

Therefore, the camera had to cover the greatest angle is Camera 3 because it had the largest angle of 71.47°

6 0
3 years ago
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