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1, if I bought(2x+4) ballpens which cost(5x+1)pesos each,how much will I pay for it?

2. A box is (xx+1)cm by(x+2)cm. What is the volume of the box?

3. Eaxh book costs(15a^2b^3)pesos each. How much will(2a) of books cost?

4. Five times a number increased by 8 is 33. What is the number?

5. The product of a number and -8 gives eight times the sum of that number and

36. Find the number

Sagot :

Emz101

Answer:

Step-by-step explanation:

1)  the equation would be:

(2x+4)x(5x+1) because if the amount of ballpens are (2x+4) and the ballpens are $(5x+1) each, you would multiply them.

this is the expanded version of (2x+4)(5x+1)
{10x^2 + 2x + 20x + 4

10x^2 + 22x + 4}


2) (x^2 +1)(x+2) are multiplied to find the volume of the box

So when expanded it looks like this:

{x^3 + 2x^2 + x + 2}


3) (15a^2b^3) would be multiplied with (2a). This is because to find the total you would times the numbers.
so when expanded:

(15a^2b^3)(2a)

{(15a^3)(2ab^3)}


4) 5X(x+8)=33

5x+40=33

5x=33-40

5x=-7

X= -7/5


5) x-8=8x

8x-x = -8

7x=-8

X=-8/7


Hope this helps :)

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