3 years ago

The graph shows the number of students who earned a score in math. Find the domain.

Mathematics

2 answers:

Alik [6]3 years ago

8 0

Answer:

the answer is D

Step-by-step explanation:

kozerog [31]3 years ago

5 0

Answer:

Step-by-step explanation:

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Please help! I need to tell whether x and y are in a proportional relationship and I need to write an equation that represents t

Alexeev081 [22]

Answer:

It is a proportional relationship

Step-by-step explanation:

To see if multiple ratios are proportional, you could write them as fractions, reduce them, and compare them. If the reduced fractions are all the same, then you have proportional ratios.The equation that represents a proportional relationship, or a line, is y=kx, where k is the constant of proportionality.

Hope this helps

the constant of proportionality is 2

7 0

3 years ago

If cosA=3√2/5,then show that cos2A=11/25

Kobotan [32]

Answer:

Step-by-step explanation:

Cos 2A = 2Cos² A - 1

$= 2*(\frac{3\sqrt{2}}{5})^{2}-1\\\\=2*(\frac{3^{2}*(\sqrt{2})^{2}}{5^{2}})-1\\\\=2*\frac{9*2}{25} - 1\\\\=\frac{36}{25}-1\\\\=\frac{36}{25}-\frac{25}{25}\\\\=\frac{11}{25}$