What does it mean to evaluate an expression in math?

Mathematics

2 answers:

Ymorist [56]2 years ago

7 0

<span>It mainly means 'simplifying an expression down to a single numerical value', I believe.</span>

zzz [600]2 years ago

7 0

Step-by-step explanation: To evaluate an expression means simplifying it down to a number and usually you will be given variables to substitute in and evaluate.

For example, let's evaluate the expression 3y + 7 when y = 2.

We simply multiply 3 x 2 and add 7 or 3(2) + 7.

3 x 2 is 6 so we have 6 + 7 which is 13.

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If sin(x) = cos(y) for acute angles x and y, how are the angles related?

Vesnalui [34]

Answer:

b. complementary

Step-by-step explanation:

-Complementary angles are angles that add up to 90°.

-These are usually the two acute angles in the right triangle.

#To verify, lets take the two angles 30° and 60°:

$Cos \ 60\textdegree=0.5\\\\Sin \ 30\textdegree=0.5\\\\\therefore Sin \ 30\textdegree=Cos \ 60 \textdegree=0.5$

#We can reverse as:

$Sin \ 60\textdegree=0.86603\\\\Cos \ 30\textdegree=0.86603\\\\\therefore Sin \ 60\textdegree=Cos \ 30\textdegree=0.86603$

Hence, two angles are said to be complimentary if they sum up to 90°.

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2 years ago

Help please!!! I’ll mark u as brainliest

sergeinik [125]

Answer:

Answer is below

Step-by-step explanation:

Yes, the graph would still be a function, but a different function than if the values were all different. This would cause two of the values to be the same and have no slope on the line. Before, the function was quadratic, but now it would be quadratic until the two values are equal.

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3 years ago

What is (-4,5) and (8,-1)

Musya8 [376]

Answer:

the slope-intercept equation of a line that passes through the coordinate (-4,5) and (8,-1) is

$y = - 0.5x + 3$