All categories

3 years ago

Expand and simplify (x+5)(x-2)

Mathematics

2 answers:

neonofarm [45]3 years ago

6 0

Answer:

${x}^{2} + 3x - 10$

Step-by-step explanation:

$(x + 5)(x - 2)$

utilise the Foil method to expand brackets:

F - mulply the first terms (x and x)

O - multiply the outside terms ( x and -2)

I - multiply the inside terms (5 and x)

L - multiply the last terms (5 and -2)

Then add them as following:

${x}^{2} - 2x + 5x - 10$

Then combine like terms:

${x}^{2} + 3x - 10$

spin [16.1K]3 years ago

5 0

Answer:

x^2 + 3x + 10.

Step-by-step explanation:

(x+5)(x-2)

= x(x - 2) + 5(x - 2)

= x^2 - 2x + 5x - 10

= x^2 + 3x + 10.

You might be interested in

how many liters is 70% alcohol solution must be added to 50 L of 40% alcohol solution to produce a 50% alcohol solution

Anettt [7]

Answer:

50%

Step-by-step explanation:

This question is solved by C1V1 + C2V2 ÷ V1 + V2 = final concentration

Let x = volume of 70% solution

let's express the concentrations as decimals, so 70% = 0.7, 50% = 0.5, and 40% = 0.4

then 0.7X + 50L.4 ÷ X + 50L = 0.5

this equation becomes 0.5(X + 50) = 0.7X + 20

which yields 0.5X + 25 = 0.7X +20

combining, we get 5 = 0.2X, and 25 = X

when we mix the two volumes, we get 50L x 40% + 25L x 70%,

which yields 20L of 100% alcohol, and 17.5L of 100% alcohol, for a total of 37.5L of alcohol in 75L of solution

which is a final concentration of 50%

3 0

2 years ago

In a game that lasts exactly 50 mins,there are 12players and 8 reserves who alternate equally with each player.If they're on the

pentagon [3]

Answer:

The answer to the question is

30 minutes

Step-by-step explanation:

To solve the question we recall the following

Duration of game = 50 minutes

Number of players per game = 12

Number of reserves = 8

Total number of players = 8 + 12 = 20

Therefore 12 players play for 50 minutes

Therefore 20 players will play for $\frac{12}{20} *50$ minutes each or 30 minutes each

Each player will have a thirty minutes turn to play on the fleld

4 0

2 years ago

Divide the following polynomial using synthetic division, then place the answer in the proper location on the grid. Write answer

Alika [10]

Answer:

12x^3 -7x^2 +14x -20

Step-by-step explanation:

See below for the synthetic division tableau.

8 0

2 years ago

PLEASE ANSWER I WILL AWARD BRAINLIEST AAAAAAAAAA<br><br> Find the measure of angle B.

professor190 [17]

Answer:

b we now know that a = 35° and, since the sum of the triangles equal 180° we can find angle b. Angle c and the 95° angle are supplementary; they add up to 180°.

Step-by-step explanation:

4 0

2 years ago

) I have an amount of money in my bank account. My younger sister has 2 1/4 times as much money as I do. My older brother has 2

Darya [45]

Answer:

$620.

Step-by-step explanation:

$3,720/2 2/3 = 1395 = younger sister's amount of money

1395/2 1/4 = 620 = his amount of money

8 0

2 years ago