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2 years ago

Can someone please help me with this expanding brackets problem ? Quick ! I will give 20 points :)

Mathematics

1 answer:

eimsori [14]2 years ago

7 0

Step-by-step explanation:

$(x + 1)(x - 6)(x + 7)$

${x}^{2} - 6x + x - 6(x + 7)$

${x}^{3} + 7x - 6 {x}^{2} - 42x + {x}^{2} + 7x - 42$

${x}^{3} - 5x {}^{2} - 35x - 42$

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Solve 3(x + 1) + 6 = 33

krek1111 [17]

Answer:

3(x + 1) + 6 = 33

3x+3+6=33

3x+9=33

3x=33-9

3x=24

x=24/3

x=8

Step-by-step explanation:

hope it help ^_^

6 0

3 years ago

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Convert 0.00054 to scientific notation

andreev551 [17]

The answer is 5.4 × 10^-4

3 0

3 years ago

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Help look at the picture it shows everything

Lady bird [3.3K]

Answer:

cant see the picture dude

Step-by-step explanation:

5 0

2 years ago

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How to set up this problem

HACTEHA [7]

Answer:

The son is five years old

Step-by-step explanation:

Let the son's age be x

A man is five as old as his son, 5x

In five years, he would be three times as old as his son

In five years: son would be x+5

Father 5x+5

3(x+5)=5x+5

3x+15=5x+5

Collect like terms

15-5=5x-3x

10=2x

Divide by 2

10/2=2x/2

x=5

The son is five years old

5 0

3 years ago

Angle 0 lies in the second quadrant and sin 0 = 3/5 cos= coy =

Elza [17]

Consider the right triangle ABC with legs AB=4, AC=3 and hypotenuse BC=5. Angle B has
$\sin B=\frac{opposite}{hypotenuse} = \frac{3}{5}$ and
$\cos B = \frac{adjacent}{hypotenuse} = \frac{4}{5}$ .

Since O lies in second quadrant $\cos O\ \textless \ 0$ and
$\cos O= -\cos B =- \frac{4}{5}$ .
Answer: $\cos O=- \frac{4}{5}$ .

3 0

3 years ago