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Ludmilka [50]
3 years ago
10

Please answer (20 points)

Mathematics
2 answers:
julsineya [31]3 years ago
6 0

Answer:

3√2

Step-by-step explanation:

perform factorisation

√18 = √ 2 × 3 × 3

= 3√2

True [87]3 years ago
6 0

Answer:

3 and sqaure root of 2.

Step-by-step explanation:

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If a = 5, b = 5 and c = 10, what is the value of ac / 2b ?
Sophie [7]

Answer:

The answer is 5 .

Step-by-step explanation:

You have to substitute the values of a, b and c into the expression :

\frac{ac}{2b}

Let a = 5,

Let b = 5,

Let c = 10,

\frac{5 \times 10}{2 \times 5}

=  \frac{50}{10}

= 5

3 0
4 years ago
Imran made a profit of 20 percent
Ivanshal [37]
He overall had a 10% loss.
6 0
2 years ago
Solve x2 = 12x – 15 by completing the square. Which is the solution set of the equation? Solve x2 = 12x – 15 by completing the s
Svetlanka [38]

Answer: 6+\sqrt{21}\ \text{and}\ 6-\sqrt{21}

Step-by-step explanation:

Given

Quadratic equation is

x^2-12x+15=0

Solving by completing the square method

\Rightarrow x^2-2\cdot 6\cdot x+15=0\\\text{add and subtract 36}\\\Rightarrow x^2-2\cdot 6\cdot x+15+36-36=0\\\Rightarrow x^2-2\cdot 6\cdot x+36+(-36+15)=0\\\text{using}\ (a-b)^2=a^2+b^2-2ab\\\Rightarrow (x-6)^2-21=0\\\Rightarrow (x-6)^2=21\\\Rightarrow x-6=\pm \sqrt{21}\\\Rightarrow x=6\pm \sqrt{21}

The solution set of the equation is 6+\sqrt{21}\ \text{and}\ 6-\sqrt{21}

6 0
3 years ago
Read 2 more answers
8. A can do a piece of work in 16 days, B in 10 days. A and B work at it together for 6 days and then C finishes it in 3 days. I
cupoosta [38]

Answer: 120 days

Step-by-step explanation:

A can complete it in 16 days.

=100/16 =6.25%/day.

B has ten days to do it.

10% every day is equal to 100/10.

So they would each contribute 16.25 percent per day as a group.

then for six days,

16.25*6 =97.50percent

97.50% of the work has been finished, in other words.

The amount of work left is now 100-97.5 = 2.5.

C finishes up the remaining job in 3 days

3.5% in 3 days, to be exact.

Consequently, he will finish his entire project in 120 days.

[2.5 * 40 = 100 percent; 40 * 3 = 120 days]

8 0
2 years ago
A movie rental kiosk charges a $25 membership fee and $3 per movie. An online movie service charges a $20 membership fee and $4
mylen [45]
25+3m=20+4m 
25=20+m
5=m 

7 0
4 years ago
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