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Nezavi [6.7K]
3 years ago
6

Work out the length of BC .

Mathematics
2 answers:
juin [17]3 years ago
8 0

Answer:

10 cm.

Step-by-step explanation:

By Pythagoras:

BC^2 = 6^2 + 8^2

BC^2 = 100

BC = 10.

mr_godi [17]3 years ago
7 0

Answer:

10

Step-by-step explanation:

Use the Pythagorean theorem: a^2+b^2=c^2 to find the hypotenuse

a=6

b=8

6^2+8^2=c^2

36+64=c^2

100=c^2

10=c

Hope this helps! :)

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Use the distributive property to simplify 3 + 5c(2 + 6c) completely.​
Charra [1.4K]

Answer:

Distributive property says that:

(A + B)*C = A*C + B*C

Now let's try to use it in our expression:

3 + 5*c*(2 + 6*c)

Here we can take the two terms inside the parentheses as A and B, and the term that multiplies them as C, then distributing we get:

3 + (5*c)*2 + (5*c)*(6*c)

Now remember that the multiplications are associative and commutative, then we can write this as:

3 + (2*5)*c + (5*6)*(c*c)

3 + 10*c + 30*c^2

And we can't simplify it anymore.

7 0
3 years ago
Please tell me what this is,....
sergey [27]

Answer:

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Step-by-step explanation:

the ratio of rows to flowers is 1:4, so for every 1 row, there are 4 flowers. so the equation would be f = 4r. do you understand how I got to that?

8 0
2 years ago
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HELP FAST giving 5 stars
Murrr4er [49]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
Select THREE expressions equivalent to -81x + 27.
Umnica [9.8K]

Answer:

1001.11

Step-by-step explanation:

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3 years ago
PLS HELP.... If 4x^2 + bx + 9 = 0, where b is the constant, has exactly one solution, what is a possible value of b ?
IgorLugansk [536]
You can use the discriminant rule, which is :
b^2 -4ac
“exactly one solution” means that it is equal to zero
so:
b^2 -4(4)(9)=0
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b^2=144
square root both sides
b=12 or -12

hope this helps !
3 0
3 years ago
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