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Zinaida [17]
2 years ago
7

NEED HELP ASAP!!!! Will give brainiest

Mathematics
1 answer:
sweet [91]2 years ago
7 0
2%(random sentence bc I need 20 characters)
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The sides of a rectangle are in the ratio 5 : 4. If the perimeter of the rectangle is 360 cm , find its area
djverab [1.8K]

Answer:

Step-by-step explanation:

let, the length is z

thus the ratio will be 5z : 4z

perimeter = 2 (a + b)

360 = 2 ( 5z + 4z )

180 = 9z

z = 20 cm

length = 100 cm and width = 80cm

area = length * width

area = 100*80

area = 8000cm²

4 0
2 years ago
Angela drew 9 rhombuses and 6 trapezoids. She wants to find q, the total number of angles in her quadrilaterals. Explain how Ang
Reil [10]
Both rhombuses and trapezoids have 4 angles. Angela can add 9 and 6 which will give her 15 and multiply by 4 which will give her 60.

Angela has 60 angles.

I hope this helped!!! :)
5 0
3 years ago
A girl is half as old as her sister and is also two years younger than her brother. If the sum of the three children's ages is $
Vesna [10]

13 and a half  5 and half and 16

5 0
3 years ago
Which of the following functions illustrates a change in amplitude?
Pachacha [2.7K]

Hey there! :)

Answer:

C.

Step-by-step explanation:

For a graph to have a change in amplitude, there must be a coefficient in front of the equation, or the 'a' value.

Recall that the transformation form of a trigonometric graph is:

y = ±a(cos(b(x-h))+k

Where 'a' is the amplitude

'b' changes the period

'h' is a horizontal shift

'k' is a vertical shift

We can look at each choice and eliminate:

A. There is only a coefficient of -1 in front of the equation, which simply results in a reflection over the x-axis. This is incorrect.

B. This equation contains a b value of 2. This changes the period of the graph, not the amplitude. This is incorrect.

C. This equation contains a coefficient, or 'a' value of -2. The amplitude is changed by a factor of 2. This is correct.

D. This graph only contains a vertical shift of 1 unit up. This is incorrect.

Therefore, C is the correct answer.

7 0
3 years ago
-10k = 20 <br> Please help I really dont understand.
algol [13]

Answer: Divide each term by − 10  and simplify.

k = −2

6 0
3 years ago
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