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4 years ago

What is the expression x2-4 for a=b=3x=5 and y=4

1 answer:

8 0

The expression [ x² - 4 ] doesn't depend on 'a', 'b', or 'y'.
It only depends on 'x'.

You have said that 3x = 5, so x = 5/3.
Therefore, I may now write '5/3' in place of 'x' in the expression:

   x² - 4 =

   (5/3)² - 4 =

        (25/9) - 4 =

      (25/9) - (36/9) =

   (25 - 36) / 9 = -11/9 = - (1 and 2/9)

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Given the equation -2x + 3y = 12, find the missing value in the ordered pair (-3,_)

gladu [14]

Answer: y = 3

Step-by-step explanation: You're given x, find y.

-2(-3) + 3y = 12 (substitute in for x)
6 + 3y = 12 (multiply)
3y = 9 (divide both sides by 3)
3 = y

7 0

3 years ago

In math class the girl to boy ratio is 8 to 6 if there are 24 girls in the class , how many boys are there ?

Volgvan

Answer: The required number of boys in the class is 18.

Step-by-step explanation: Given that in math class, the girl to boy ratio is 8 to 6 and there are 24 girls in the class.

We are to find the number of boys in the class.

Let 8x and 6x represents the number of girls and boys in the class.

Then, according to the given information, we have

$8x=24\\\\\Rightarrow x=\dfrac{24}{8}\\\\\Rightarrow x=3.$

Therefore, the number of boys in the class is given by

$6x=6\times3=18.$

Thus, the required number of boys in the class is 18.

7 0

3 years ago

Nia had a 20 inch by 30 inch enlargement made of a photograph. She wanted to have it framed. How many inches of frame would it t

Sedaia [141]

Answer: 100 inches

Step-by-step explanation:

From the question, we are given the information that Nia had a 20 inch by 30 inch enlargement made of a photograph and that she wanted to have it framed.

The number of inches of frame that she would use to enclose the photo will be gotten by calculating the perimeter of the shape and this will be:

= 2(length + width)

= 2(30 + 20)

= 2(50 inches)

= 100 inches

To enclose the photo, 100 inches of frame is needed.

8 0

3 years ago

Is algebra.

gulaghasi [49]

Answer:

2(x - 9.46)(x + 2.54)

Step-by-step explanation:

2(x² - 12x + 24)

since there are no factors that multiply to 24 and add to -12 then i used the quadratic formula to get:

6+2 $\sqrt{3}$ , 6-2 $\sqrt{3}$

7 0

3 years ago

93❌10 to the sixth power of ten as a whole number

Alja [10]

93×10^6 = 93000000

It is equal to 93 million (with exactly 6 zeroes).

8 0

3 years ago

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