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Bad White [126]

3 years ago

12

eliza is making seed bead necklace. For every 2 pink beads, she uses 7 black beeds. if the necklace has 112 black beads, how man

y pink beads are on the necklace?

1 answer:

tester [92]3 years ago

8 0

8 if not that then its 56 or i might be wrong but it seems right to me

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Can someone please help me! I don’t understand how to do this!

Nutka1998 [239]

9514 1404 393

Answer:

a. 4x^2 +16x -48 = 4x^2 +16x -48

b. -3x^2 +12x +36 = -3x^2 +12x +36

c. x^2 +12x +35 = x^2 +12x +35

Step-by-step explanation:

In general, you would prove this by transforming one of the expressions into the other. The easiest would be to transform the factored form into the vertex form, perhaps, as this would spare you trying to explain the magic of factoring.

Alternatively, you can transform both expressions into the same (standard) form. I believe that will be the easiest of all.

The product of two binomials is ...

(x +a)(x +b) = x(x +b) +a(x +b) = x^2 +bx +ax +ab

(x +a)(x +b) = x^2 +(a+b)x +ab . . . . after collecting terms

The square of a binomial is the same thing, but with b=a, so ...

(x +a)^2 = x^2 +2a +a^2

Using these forms, we can avoid showing all of the intermediate "work" of making the desired transformations.

__

a. 4(x -2)(x +6) = 4(x +2)^2 -64

4(x^2 +4x -12) = 4(x^2 +4x +4) -64 . . . . . expanding the products

4x^2 +16x -48 = 4x^2 +16x +16 -64 . . . . using the distributive property

4x^2 +16x -48 = 4x^2 +16x -48 . . . . . collect terms; expressions are equal

__

b. -3(x +2)(x -6) = -3(x -2)^2 +48

-3(x^2 -4x -12) = -3(x^2 -4x +4) +48

-3x^2 +12x +36 = -3x^2 +12x -12 +48

-3x^2 +12x +36 = -3x^2 +12x +36

__

c. (x +5)(x +7) = (x +6)^2 -1

x^2 +12x +35 = x^2 +12x +36 -1

x^2 +12x +35 = x^2 +12x +35

6 0

3 years ago

Read 2 more answers

What does 22 divided by 3 plus 1 equal?

nordsb [41]

Answer:

8.33

Step-by-step explanation:

6 0

3 years ago

I need help with this ?

GenaCL600 [577]

1)Shade 56 of the cubes
2)0.056

4 0

3 years ago

What is the length of side a?

Eddi Din [679]

Answer:

do provide the figure dude.

8 0

3 years ago

There are 2504 computer science students at a school. Of these, 1876 have taken a course in Java, 999 have taken a course in Lin

Y_Kistochka [10]

Answer:

492

Step-by-step explanation:

As per the given data of the question:

Total number of students = 2504

Number of students in Java (J) = 1876

Number of students in Linux (L) = 999

Number of students in C = 345

J∩L = 876

L∩C = 231

C∩J = 290

L∩J∩C = 189

Now according to Venn-diagram as drawn below:

Number of students haven taken courses in Java and Linux both only

= J∩L - L∩J∩C

= 876 - 189

= 687

Number of students haven taken courses in Java and C both only

= C∩J - L∩J∩C

= 290 - 189

= 101

Number of students haven taken courses in C and Linux both only

= L∩C - L∩J∩C

= 231 - 189

= 42

Therefore,

Number of students only in Java = 1876 - 687 - 189 - 101 = 899

Number of students only in Linux = 999 - 687 - 189 - 42 = 81

Number of students only in C = 345 - 42 - 189 - 101 = 13

So,

Number of students who have not taken a course in any of these three subjects

= 2504 - 899 - 81 - 13 - 687 - 189 -101 - 42

= 492

Hence, the students who have not taken a course in any of these three subjects = 492.

6 0

3 years ago