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Hunter-Best [27]
3 years ago
6

James has a mass of 32.8 kg. Ricardo's mass is 8 3/4 kg more than James's. Winthorp's mass is 3.6 kg less than Ricardo's. What i

s the total mass of the three boys?
Mathematics
1 answer:
strojnjashka [21]3 years ago
3 0

Answer:79.5

Step-by-step explanation:32.8+8.75=41.55 41.55-3.6=37.95 37.95+41.55+32.8=79.5

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If 2/3 X ? = 1 what number goes in the box
Tatiana [17]

Answer:1/3?

Step-by-step explanation: sorry I don’t wanna take ur points just be more specific in the comments pls

7 0
2 years ago
Write 140,000 in the correct scientific notation form. 14 x 10 4 1.4 x 10 4 1.4 x 10 5 14 x 10 5
Arte-miy333 [17]

Answer:

1.4*10^4

Step-by-step explanation:

move the decimal 4 places

3 0
3 years ago
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The perimeter of a triangular field is 120m. Two of the sides are 21m and 40m.Calculate the largest angle of the field.
Mama L [17]

Answer:

the largest angle of the field is 149⁰

Step-by-step explanation:

Given;

perimeter of the triangular filed, P = 120 m

length of two known sides, a and b = 21 m and 40 m respectively

The length of the third side is calculated as follows;

a + b + c = P

21 m  + 40 m  + c = 120 m

61 m +  c = 120 m

c = 120 m - 61 m

c = 59 m

                         B

                     ↓            ↓  

                  ↓                          ↓

                ↓                                       ↓

            A →  →  → →  →  → →  → →    →    →  C

Consider ABC as the triangular field;

Angle A is calculated by applying cosine rule;

a^2 = b^2 + c^2 - 2bc \ Cos A\\\\Cos \ A = \frac{b^2 + c^2 - a^2}{2bc} \\\\Cos \ A = \frac{40^2 + 59^2 - 21^2}{2 \times 40 \times 59} \\\\Cos \ A = 0.983\\\\A = Cos ^{-1} (0.983)\\\\A = 10.6 \ ^0

Angle B is calculated as follows;

Cos \ B = \frac{a^2 + c^2 - b^2}{2ac} \\\\Cos \ B = \frac{21^2 + 59^2 - 40^2}{2 \times 21 \times 59} \\\\Cos \ B = 0.937\\\\B= Cos ^{-1} (0.937)\\\\B = 20.5 \ ^0

Angle C is calculated as follows;

Cos \ C = \frac{a^2 + b^2 - c^2}{2ab} \\\\Cos \ C = \frac{21^2 + 40^2 - 59^2}{2 \times 21 \times 40} \\\\Cos \ C = -0.857\\\\C = Cos ^{-1} (-0.857)\\\\C = 149\ ^0

Therefore, the largest angle of the field is 149⁰.

       

8 0
3 years ago
Perimeter of 40 triangles when the sides are all 1 cm long
Marianna [84]

Answer: 120 cm.

Step-by-step explanation: Each triangle has 3 sides, and each side is 1 cm. Multiply the number of sides for one triangle by the total number of triangles. 3 x 40=120. The perimeter is 120 cm.

7 0
2 years ago
What is 3 square root of 24- 4 square root of 54
erastovalidia [21]
\sqrt[3]{24} = 2 \sqrt[3]{3} \\ \\ \sqrt[4]{64} = 2 \sqrt[4]{4} \ \ maybe \ is\ it \ this \ number ? \ 54 \ is\ \ strange
8 0
3 years ago
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