3 years ago

If using the method of completing the square to solve the quadratic equation

Mathematics

1 answer:

jenyasd209 [6]3 years ago

4 0

You add half of the coefficient of x and square it.

What you do on one side,you must do it on the other.

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A cell phone company charges a monthly rate of $12.95 and $0.25 a minute per call. The bill for m minutes is $21.20. Write an eq

aleksklad [387]

Answer:

y= 12.95x + 0.25

Step-by-step explanation:

4 0

3 years ago

The recursive rule for a sequence is an=an-1+7, where a1=15.What is the explict rule for this sequence

posledela

well, the recursive rule of aₙ = aₙ₊₁ + 7, where a₁ = 15, is simply saying that

we start of at 15, and the next term is obtained by simply adding 7, and so on.

well, that's the recursive rule.

so then let's use that common difference and first term for the explicit rule.

$\bf n^{th}\textit{ term of an arithmetic sequence} \\\\ a_n=a_1+(n-1)d\qquad \begin{cases} a_n=n^{th}\ term\\ n=\textit{term position}\\ a_1=\textit{first term}\\ d=\textit{common difference}\\ \cline{1-1} a_1=15\\ d=7 \end{cases} \\\\\\ a_n=15+(n-1)7\implies a_n=15+7n-7\implies a_n=7n+8$

5 0

3 years ago

Find the absolute value of the complex number. <br><br>4+3i

iVinArrow [24]

The answer is 7i because if you add 4+3i together as an absolute value, it equals to 7 plus the i is 7i

7 0

3 years ago

How can I solve (b)?

dsp73

90/3 parts of silver = 30 times multiplied by
tin = 12 × 30 = 360g
lead = 8 × 30 = 240g

12.5 / 23 = 0.5434 parts per metal

tin = 12 × 0.5434 = 6.5kg
lead = 8 × 0.5434 = 4.5kg
silver = 3 × 0.5434 = 1.5kg

5 0

3 years ago

The product of 7 and X is 90. write an equation to represent the statement

My name is Ann [436]

Answer:

x=90/7

Step-by-step explanation:

7x=90

x=90/7

7 0

2 years ago

Read 2 more answers