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VMariaS [17]
3 years ago
15

I really need to know the answer

Mathematics
1 answer:
kramer3 years ago
4 0

We must follow order of operations rules (PEMDAS).

Thus, mult. and div. must be carried out before addn. and subtrn.

Calculate the quotient of (-2/5) and (4/5). In other words, divide (4/5) into (-2/5). Invert (4/5) and multiply:

(-2/5)(5/4) = -1/2

Then we have, in place of the original expression, the following expression:

-3/4 - 1/2 + (2 1/2).

Rewriting 2 1/2 as an improper fraction and elim. the parentheses yields:

-3/4 - 2/4 + 5/2, or -3/4 - 2/4 + 10/4, since the LCD is 4.

This yields 5/4 (answer)

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At birth, the rhino weighed 85 pounds. The rhino gained the same amount of pounds each month for 6 months. After 6 months, the r
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Answer:

68 pounds a month

Step-by-step explanation:

so what i did is subtract 85 because that was the starting weight, now we have 408 I divided 6 (how many months) and got 68.

5 0
3 years ago
Angle A is circumscribed about circle O what is the length of AB
Nana76 [90]

Answer:

AB \approx 4.054

Step-by-step explanation:

The trigonometric equations associated with the figure are, respectively:

AB = 4\cdot \cos 73^{\circ} + 3\cdot \cos \alpha

4\cdot \sin 73^{\circ} = 3 +3\cdot \sin \alpha

The components with the unknown angle are cleared and used in the fundamental trigonometric relation:

3\cdot \cos \alpha = AB - 4\cdot \cos 73^{\circ}

3\cdot \sin \alpha = 4\cdot \sin 73^{\circ} - 3

9\cdot \cos^{2}\alpha + 9\cdot \sin^{2}\alpha =(AB-4\cdot \cos 73^{\circ})^{2}+(4\cdot \sin 73^{\circ}-3)^{2}

9 = AB^{2}-2.339\cdot AB + 1.368 + 0.681

The following second-order polynomial is presented below:

AB^{2}-2.339\cdot AB -6.951 = 0

Roots of the polynomial are described hereafter:

AB_{1} \approx 4.054 and AB_{2} \approx -1.715

Only the first root is reasonable, as length is a positive variable. The length is AB \approx 4.054.

6 0
3 years ago
Robert wants to throw a party for his friends. He has booked a banquet hall where he plans to serve dinner. The hall costs $200,
7nadin3 [17]
Your standard equation is y = mx + b

P should be the output (y) because it is the final bill. B should be represented by 200 because the $200 is an additional, once payed fee. M should be 30 because the amount payed for dinner depends on how many people are served.

p = final bill
b = 200
m = 30
x = number of friends

So, your equation would look like p = 30x + 200

Hope this helps!
7 0
3 years ago
Read 2 more answers
Find the area of a trapezium whose parallel sides are 34cm,20cm and the other sides are 13cm and 15cm.​
Genrish500 [490]

Hope its helpful to you mark me as a brainlist

5 0
3 years ago
11) How many kilograms of How many kilograms of calcium are there
Over [174]
Answer. A. 78.5 kg
Explanation. First, we must convert the lbs into grams, we can do this my multiplying 454 by 173 and get 78,500. Then convert it to kg, there are 1,000 g in a kg do divide 78,500 by 1,000 to get 78.5 kg. Let me know if it’s correct so others can use it. Brainliest would be appreciated.
Good luck :)
4 0
3 years ago
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