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Lilit [14]
3 years ago
9

-28 = -7(3x + 4) +21x

Mathematics
1 answer:
Vlada [557]3 years ago
7 0

Answer:

1 Expandir.

-28=-21x-28+21x

−28=−21x−28+21x

2 Simplifica  -21x-28+21x−21x−28+21x  a  -28−28.

-28=-28

−28=−28

3 Ya que ambos lados son iguales, hay infinitas soluciones.

Soluciones Infinitas

Step-by-step explanation:

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What is 2x2, I keep on getting it wrong. Can u please help, Thank you
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4

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Expand the binomial <img src="https://tex.z-dn.net/?f=%28x%2B1%29%5E3" id="TexFormula1" title="(x+1)^3" alt="(x+1)^3" align="abs
LenKa [72]

Answer:

Solution: x³ + 3x² + 3x + 1

Step-by-step explanation:

Take a look at the following Pascal's Triangle:

(x + y)⁰ =                                1

(x + y)¹ =                             1x + 1y

(x + y)² =                       1x² + 2xy + 1y²

(x + y)³ =                  1x³ + 3x²y + 3xy² + 1y³

(x + y)⁴ =             1x⁴ + 4x³ + 6x²y² + 4xy³ + 1y⁴

As you can see our binomial is '(x + 1)³.' Therefore we expand the expression with respect to the third row in the Pascal's Triangle, (x + y)³ = 1x³ + 3x²y + 3xy² + 1y³. The procedure would be as follows:

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7 0
3 years ago
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Use the following information for problems 1 – 3. Suppose you sign a contract for an annual salary of $50,000 with a guaranteed
erik [133]

Initial salary =  $50,000 .

Rate of raise = 5% each year.

Therefore, each next year salary would be 105% that is 1.05 times.

5% of 50,000 = 0.05 × 50000 = 2500.

Therefore raise is $2500 each year.

According to geometric sequence first term 50000 and common ratio 1.05.

Applying geometric sequence formula

a_n = ar^{n-1}

1) a_n = 50000(1.05)^{n-1}

2) In order to find salary in 5 years we need to plug n=5, we get

a_5 = 50000(1.05)^{5-1}= 50000(1.05)^4

= 50000(1.21550625)

<h3>=$60775.3125.</h3>

3) In order to find the total salary in 10 years we need to apply sum of 10 terms formula of a geometric sequence.

S_n = \frac{a(1-r^n}{1-r}

Plugging n=10, a = 50000 and r= 1.05.

S_10 = \frac{50000(1-(1.05)^{10}}{1-1.05}

S_10 = \frac{50000(0.050)^{10}}{0.05}

= 628894.62678.

<h3>Therefore , you will have earned $ 628894.62678 in total salary by the end of your 10th year.</h3>



7 0
3 years ago
Four times what gets you fourtheight
lakkis [162]
I think you mean 48. 4 * x = 48. x = 48/4 = 12
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