What is 4 3/4 + 2 1/2

7 1/4

Step-by-step explanation:

Multiply the denominator of 1/2 to equal the denominator of 3/4.

3/4 + 2/4 = 1 1/4.

4 + 2 = 6.

6 + 1 1/4 = 7 1/4.

convert it to improper fractions first

4 3/4

multiply the whole number by the denominator

4*4 = 16

then add the numerator

16+3 = 19

so 4 3/4 = 19/4

apply the same concept to 2 1/2 to get 5/2

now add them

19/4 + 5/2

common denominator = 4

multipky the second fraction’s numerator and denominator  by 2

5*2 = 10

2*2 = 4

5/2 = 10/4

now add

19/4 + 10/4 = 29/4

which you can convert back to a mixed fraction by dividing to the nearest whole number

4*7 = 28

which leaves 1/4

29/4 = 4 1/4

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

if the pizza is divided equally into 2 equal halves then you would get

πr^2/2

where r is the radius of the pizza.

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