Questões matemáticas

4) 3a - 4b (4 - 7a + 2b) + b

6) 3mn (m² + n² - m + 4n - 5)

8) (x + √5) ²

9) (4x + 2y) ²

10) (2w-1,6) ²

13) (x+11) (x+18)

15) (x+4,7) (x+3,25)

Considere x=-4, y=48 e z=2,7

17) 2x-y+3z

18) xz+1,57

20) x³+2x²-4x

A rancher has 4 comma 700 feet of fencing available to enclose a rectangular area bordering a river. he wants to separate his cows and horses by dividing the enclosure into two equal areas.

A holiday costs £1200. Work out the price after a 7% discount.

How write 6/8 and 7/8 as decimals and explain thinking?

Iris wants to buy two necklaces one for your sister and one for self the necklace for her sister cost $42 and the necklace for her self cost $28 the sales tax on the purchases is 8% find the total cost of iris's purchases including sales tax if

Evaluate each expression g5-h3 if g=2 and h=7

Pat and his friend rent an apartment together. Their total cost to move in included first months rent, last months rent and a security deposit of $600. If Pat paid a total of $1,050 to move in, how much is his share of the rent each month? a. $375 b.

Write 1/20 as a decimal

A store is selling blank CDs in packages of 25 for $5. Write and solve a multiplication equation to find the cost of one blank CD.

In the process of solving an equation, a student noticed that only integers remained on each side of the equation. The student concluded that the equation must have no solution. Is the student correct? Explain.

What expression can be used to find the sum of the polynomials?