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3 years ago

Whoever asnwers first and gets the answer right will get brainliest.

Mathematics

2 answers:

Solnce55 [7]3 years ago

7 0

The answer is B because the rest are biased

nikklg [1K]3 years ago

4 0

Answer:

No the answer is D) Survey 50 customers playing an online game at the Internet Cafe.

Step-by-step explanation:

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Working together, two secretaries can stuff the envelopes for a political fund-raising letter in 3 hours. Working alone, it take

AlekseyPX

Answer:

Faster worker takes 4 hours and slower worker takes 12 hours.

Step-by-step explanation:

Let x be the time ( in hours ) taken by faster worker,

So, according to the question,

Time taken by slower worker = (x+8) hours,

Thus, the one day work of faster worker = $\frac{1}{x}$

Also, the one day work of slower worker = $\frac{1}{x+8}$

So, the total one day work when they work together = $\frac{1}{x}+\frac{1}{x+8}$

Given,

They take 3 hours in working together,

So, their combined one day work = $\frac{1}{3}$

$\implies \frac{1}{x}+\frac{1}{x+8}=\frac{1}{3}$

$\frac{x+8+x}{x^2+8x}=\frac{1}{3}$ ( Adding fractions )

$3(2x+8)=x^2+8x$ ( Cross multiplication )

$6x+24=x^2+8x$ ( Distributive property )

$x^2+2x-24=0$ ( Subtraction property of equality )

By quadratic formula,

$x=\frac{-2\pm \sqrt{100}}{2}$

$x=\frac{-2\pm 10}{2}$

$\implies x=4\text{ or }x=-6$

Since, hours can not negative,

Hence, time taken by faster worker = x hours = 4 hours,

And, the time taken by slower worker = x + 8 = 12 hours.

6 0

4 years ago

Help me plseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

DanielleElmas [232]

Answer:

Step-by-step explanation:

uhh

8 0

3 years ago

The surface area of one cube is twice the surface area of a second cube.

Liono4ka [1.6K]

Answer:

8:1

Step-by-step explanation:

Volume of a cube = Length of edge³

So the equation for the small cube is,

V=L³

If the edge of the bigger cube is twice as long as the smaller cubes edge, then the equation for the bigger cube is:

V = (2L)³

= (2³)L³

= (8)L³

Combining these two in ratio form:

(8)L³ : (1)L³

You can remove the L³ from each side because they are equal

So the answer is 8:1

5 0

3 years ago

Read 2 more answers

Answer each question and explain your reasoning.<br>How long is 75% of 60 minutes?

uysha [10]

Answer:

45 minutes

Step-by-step explanation:

75% is the same as $\frac{3}{4}$ . This means that we can multiply 60 by $\frac{3}{4}$ to find 75% of 60.

$60*\frac{3}{4} \\\\\frac{180}{4} \\\\\frac{90}{2}\\\\45$

5 0

3 years ago

Read 2 more answers

12.

Verdich [7]

Answer:

Step-by-step explanation:

The elevati0on of sea level is 0 km and the elevation of the summit is 10 km

4 0

4 years ago