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DedPeter [7]
2 years ago
5

Which equation shows a true proportion

Mathematics
1 answer:
Oduvanchick [21]2 years ago
8 0

Answer: the first equation is the answer.

Step-by-step explanation: As you can see the first equation is 5/7=15/21. The are proportional because 5*3=15 and 7*3=21. If they are multiplied or divided by the same number, then they are proportional. It does not work with adding, subtracting or flipping.

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Find DC, given that line AD is the angle bisector of
RoseWind [281]

Answer:

2

Step-by-step explanation:

because line a d divided the triangle ABC is into equal parts therefore line BD is equal to line DC which is equal to 2

6 0
2 years ago
True or false <br> cos(65 degrees) = sqrt 1+cos(130 degrees)/2
Snezhnost [94]
False is the correct answer
5 0
3 years ago
Find the Area-Rectangle<br> a = x +3<br> b = 2x - 1
Anna71 [15]

Answer:

2x^2 + 5x - 3

Step-by-step explanation:

Area = length (a) * width (b)

(x + 3) * (2x - 1)

2x^2 + 6x - x - 3 (combine like terms)

2x^2 + 5x - 3

Brainliest, please :)

7 0
1 year ago
Can you answer 21 please?!
just olya [345]
We can set up the following equation:

4x + 4(5) = 54

X representa the cost of a salad, and the 4(5) shows how each time she left a tip of 5.

Now we solve:

4x + 20 = 54

Subtract 20 from each side:

4x = 34

Now divide by 4

X = 8.5

So the cost of each salad is $8.50

I hope this Helps!
4 0
3 years ago
Read 2 more answers
bella rolls 2 standard dice 60 times. how many times can she expect the sum of the numbers to be greater than 10?
iris [78.8K]

Answer: in 5.

Step-by-step explanation:

The summ is greater when:

D1 = 5, D2 = 6

D1 = 6, D2 = 5

D1 = 6, D2 = 6

3 outcomes out of the 36 possible outcomes (6 for each dice, 6*6 = 36) for rolling 2 dice,

The relative probability is:

p = 3/36

Then, in 60 rolls, we can expect that:

(3/36)*60 = 5

In 5 rolls the sum of the numbers is greater than 10.

6 0
2 years ago
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