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Advocard [28]
4 years ago
15

How do you know if it is a adding or subtraction problem when you combine like terms?

Mathematics
1 answer:
Snowcat [4.5K]4 years ago
4 0
You look at the sign behind the second term. Here are some examples...

2x + 8 - 4x 
You are going to subtract 2x - 4x because there is a negative sign behind the 4x.

8y + 1 + y
You are going to add 8y + y because there is a positive sign behind the y.

4 + 2x - 5 + 7x
You are going to subtract 4 - 5 because there is a negative sign behind the 5.
You are going to add 2x + 7x because there is a positive sign behind the 7x.
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PLEASE HELP I don't understand at all please help
daser333 [38]
I would use the Law of Sines to solve this problem.
The angle next to the 58 degree angle is 122 degrees. The side opposite this angle is 3.72 km.
The angle we need to find is at the cave. The side opposite this angle is 2.60 km.
(Sin 122/3.72) = (Sin x/2.60)
Cross multiply to solve.
3.72 Sin x = 2.60 Sin 122
Divide both sides by 3.72
Sin x = (2.60 Sin 122)/3.72
Sin^-1 x = (2.60Sin122)/3.72
x = 36 degrees
7 0
3 years ago
Which question is statistical?
Stella [2.4K]
I thinks its B




p.s. spread le cheese ⌂
4 0
3 years ago
A quadrilateral PQRS is inscribed in a circle, as shown below: A quadrilateral PQRS is inscribed in a circle. The measure of ang
nydimaria [60]
Arc PQR measures 210°

An intercepted arc measures twice the intercepted angle. Here, the intercepted angle is ∠PSR. Hence:
Arc PQR = 2 * ∠PSR

1.) Compute for ∠PSR first. Opposite angles in a quadrilateral measures 180°. Hence:
∠PQR + ∠PSR = 180°
     75° + ∠PSR = 180°
               ∠PSR = 180° - 75°
               ∠PSR = 105°

2.) Proceed with computing Arc PQR:
Arc PQR = 2 * ∠PSR
               = 2 * 105°
               = 210°
6 0
3 years ago
Read 2 more answers
It took 48 minutes to drive downtown. An app estimated it would be less than that. If the error was 20%, what was the app’s esti
IgorLugansk [536]

Answer:

The estimated taken to drive downtown using App is 38.4 minutes

Step-by-step explanation:

Given as :

The initial time taken to drive downtown = i = 48 minutes

The percentage error of time = r = 20%

Let The estimated time using app = t min

Let the time = 1 min

<u>Now, according to question</u>

The estimated time using app = The initial time taken to drive downtown × (1-\dfrac{\textrm rate}{100})^{\textrm time}

Or, t minutes = i minutes × (1-\dfrac{\textrm r}{100})^{\textrm 1}

Or, t = 48 minutes × (1-\dfrac{\textrm 20}{100})^{\textrm 1}

Or,  t = 48 minutes × \dfrac{100-20}{100}

Or,  t = 48 minutes × \dfrac{80}{100}

∴ t = \dfrac{48\times 80}{100} minutes

I.e t = 38.4 minutes

Or, The estimated time using app = t = 38.4 min

Hence, The estimated taken to drive downtown using App is 38.4 minutes Answer

5 0
3 years ago
On a spelling quiz, Lily got 16 out of 20 questions correct. Select all the expressions that show the ratio of Lily’s correct an
levacccp [35]

Answer:

E.

Step-by-step explanation: Unless you accidentally swapped the 5 and 4 around for D, then the answer is just E.

8 0
3 years ago
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