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3 years ago

What is the first step to simplify the expression 5x – x(2 – 3x) + 2?

Mathematics

2 answers:

marin [14]3 years ago

6 0

Answer:

"distribute $-x$ to the terms inside the parentheses"

Step-by-step explanation:

The first step in any expression like this is going to be simplifying inside the parenthesis.
Next would be to square/cube any parenthesis.
Then, we can distribute.
Then combine like terms.

Looking at this specific problem, we see that the terms inside parenthesis are ALREADY SIMPLIFIED, so disregard this step.

There aren't any square/cube to EXPAND, so disregard this step as well.

There IS DISTRIBUTION in this problem. Distributing -x with the term inside the parenthesis, (2-3x). Hence, distribution should be the FIRST STEP of this problem.

Fourth answer choice is right.

kiruha [24]3 years ago

5 0

Combine All Like Terms

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3 years ago

Find the value of sin(a/2) if cosa= 12/13<br>

daser333 [38]

Answer: sin $\frac{a}{2}$ = ± $\frac{1}{\sqrt{26} }$

Step-by-step explanation:

We very well know that,

cos2A=1−2sin²A

⟹ sinA = ± $\sqrt{(1-} \frac{cos2A}{2} )$

As required, set A = $\frac{a}{2}$ & cos a= $\frac{12}{13}$ ,thus we get

sin $\frac{a}{2}$ =± $\sqrt{\frac{1-cos a}{2} }$

∴ sin $\frac{a}{2}$ =± $\sqrt{\frac{1-\frac{12}{13} }{2} }$ = ± $\frac{1}{\sqrt{26} }$

since ,360° < $\frac{a}{2}$ <450°

,180° < $\frac{a}{2}$ <225°

Now, we are to select the value with the correct sign. It's is obvious from the above constraints that the angle a/2 lies in the III-quadrant where 'sine' has negative value, thus the required value is negative.

hope it helped!

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3 years ago

What is 3 2/8 + 1 1/3

Travka [436]

Answer: 4 and 7/12

Step-by-step explanation: To add mixed numbers, first add the fractions. To add unlike fractions such as 2/8 + 1/3, first find a common denominator. The common denominator of 8 and 3 is simply the least common multiple of 8 and 3 which is 24.

To get 24 in the denominator of 2/8, we multiply the numerator and denominator by 3 to get the equivalent fraction 6/24.

To get 24 in the denominator of 1/3, we multiply the numerator and denominator by 8 to get the equivalent fraction 8/24.

Now, we have to deal with adding mixed numbers. To add mixed numbers, we will first need to add the fractions. In this case, we have 6/24 + 8/24 which is 14/24.

Now, we have to add the whole numbers. In this case, we have 3 + 1 which gives us 4. Notice that we can reduce our fraction by dividing both the numerator and denominator by 2 to get 7/12.

Therefore, our answer is 4 and 7/12.

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4 years ago

I NEED HELP IM STUCK ITS CONFUSING,

diamong [38]

Answer:

Step-by-step explanation:

88-24=64 which is the right answer

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2 years ago

Will mark brainliest with ONE question!!^^^^^^^^

Blababa [14]

Answer:

c + 0.5b =700 and c + b =1,000 I think

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3 years ago

Read 2 more answers