Help me plssss its for a math test and im braindead atm

Mathematics

2 answers:

Gwar [14]3 years ago

5 0

Answer:

5/8

Step-by-step explanation:

3/8 + 1/4

To add these fractions, you need a lowest common denominator. Both 4 and 8 "go into" 8, so the lowest common denominator is 8.

In order to change the denominator 4 to 8, you need to multiply both the numerator and the denominator by 2. So, 1/4 becomes 2/8.

Now, the problem is 3/8 + 2/8.

You can add the numerators, because the denominator is the same for each fraction.

3/8 + 2/8 = 5/8

denis23 [38]3 years ago

3 0

<h2>Answer: </h2><h2>2. 3/2= 1 1/2 </h2><h2>3. 9 1/10</h2><h2>4. 4/5</h2><h2 />

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Evaluate the expression Arcsec(sqrt 2). Do not use your calculator to answer this question. Do not express answer in decimals.

Igoryamba

Pi/4 radians
You're looking for the angle that has a secant of sqrt(2). And since the secant is simply the reciprocal of the cosine, let's take a look at that.
sqrt(2) = 1/x
x*sqrt(2) = 1
x = 1/sqrt(2)
Let's multiply both numerator and denominator by sqrt(2), so
x = sqrt(2)/2
And the value sqrt(2)/2 should be immediately obvious to you as a trig identity. Namely, that's the cosine of a 45 degree angle. Now for the issue of how to actually give you your answer. There's no need for decimals to express 45 degrees, so that caveat in the question doesn't make any sense unless you're measuring angles in radians. So let's convert 45 degrees to radians. A full circle has 360 degrees, or 2*pi radians. So:
45 * (2*pi)/360 = 90*pi/360 = pi/4
So your answer is pi/4 radians.

5 0

3 years ago

Read 2 more answers

Are these ratios equivalent?

vaieri [72.5K]

Answer:

Yes

Step-by-step explanation:

3 medium cars to 1 small car can be made into a fraction like this: $\frac{3}{1}$ or $\frac{1}{3}$ . But you must be consistent if the denominator represents medium cars or small cars.