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Karo-lina-s [1.5K]
3 years ago
11

How can you tell if an expression is a perfect square trinomial? Explain.​

Mathematics
1 answer:
astra-53 [7]3 years ago
3 0

Answer:

Step-by-step explanation:

A perfect square trinomial is the square of a binomial.

One of the special products and factors formulas that you should know is

(a + b)^2 = a^2 + 2ab + b^2; another is (a - b)^2 = a^2 - 2ab + b^2.

So, if you are given a trinomial and can use either of the above identities to rewrite it as the square of a binomial, you've got it.

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The scale of a map is 1:10000.Work out the distance between two banks on the map if the real distance is 600meters.​
sveta [45]

Answer:

6 meters.

Step-by-step explanation:

The scale of a map is 1:10000

The real distance between two banks is 600 meters.

We are to find the distance between the two banks on the map.

This scale means that for every 1 meter on the map there are 10,000 meters on the real world.

So 600 meters on the real world would be represented by;

Cross-multiplying gives:

\frac{600}{10000}  * 100 = 6 meters.

4 0
3 years ago
Read 2 more answers
Two ropes are attached to a large ballon in a parade. The people holding the ropes are 40 feet apart,and the angle between the t
qaws [65]

Ropes are 9.63 meters ans 8.178 meters.

<u>Step-by-step explanation:</u>

Step 1 :

List all the given things

         Distance between people holding ropes = 40 =(40*0.3048) meters = 12.192 meters

         Angle between two ropes = 86 degrees

         Angle of elevation of one rope = 42 degrees

Step 2 :

Two angles of triangle are already given so third angle can be calculated as -  

            Third angle = 180 - ( 86 + 42 ) = 52 degrees

Step 3 :

As we know all three angles we will apply sine rule now, which is

\frac{a}{sine A} = \frac{b}{sine B} = \frac{c}{sine C}

Step 4 :

By putting values, we have

\frac{a}{sine 52} = \frac{b}{sine 42} = \frac{12.192}{sine 86}

Step 5 : Calculating a and b

a = 12.192 * \frac{sine 52}{sine 86}   ,   b = 12.192 * \frac{sine 42}{sine 86}      

Step 6 :

By putting values of all sine and calculating we get,

a = 9.63 meters and b = 8.178 meters                                

4 0
3 years ago
6-8x=23<br> What number is x
Vikki [24]
X = -17/8

Do you need explanation?
7 0
3 years ago
Read 2 more answers
Complete the statements and equations to find the product of 6 and 13
Alina [70]

Answer:

78

Step-by-step explanation:

the product of 6 and 13 =78

8 0
4 years ago
Help me please i would really appreciate it ill give 20+ points
Alinara [238K]
It might be d because the side are all the exact same size!
6 0
3 years ago
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