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4 years ago

Select the best answer for the question.

Mathematics

1 answer:

Natali5045456 [20]4 years ago

8 0

Answer:

Step-by-step explanation:

5/7 x 9/9 = 45/63

I'm assuming there's supposed to be a slash between the 45 and 63!

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Which ones do I choose?

Snezhnost [94]

Answer:

-6w-22

Step-by-step explanation:

-3(2w+6)-4=

= -6w-18-4=

= -6w-22

So,choose C (none of the above) :)

7 0

3 years ago

Three workers have to do a certain job. The first worker can finish the job in 8 hours. The second worker can finish the job in

mestny [16]

Working together three workers would take 1 hour 36 minutes to finish the job

Solution:

Given that first worker can finish the job in 8 hours

So in one hour, first worker can do $\frac{1}{8}$ th of the work

The second worker can finish the job in 4 hours

So in one hour, second worker can do $\frac{1}{4}$ th of the work

The third worker can also finish the job in 4 hours

So in one hour, third worker can do $\frac{1}{4}$ th of the work

The three workers working together in 1 hour can do:

$\frac{1}{8} + \frac{1}{4} + \frac{1}{4} = \frac{1 + 2 + 2}{8} = \frac{5}{8}$

The three worker can thus do $\frac{5}{8}$ th of the work in one hour

Hence the three of them together can finish the work in $\frac{8}{5}$ hours

$\frac{8}{5} = 1\frac{3}{5}$ hours

Thus working together three workers would take 1 hour 36 minutes to finish the job

8 0

3 years ago

5<img src="https://tex.z-dn.net/?f=5%5E%7B56%7D%20x%205%5E%7B22%7D%20x%205%5E%7B-96%7D" id="TexFormula1" title="5^{56} x 5^{22}

Akimi4 [234]

Answer:

$\frac{ {11}^{56} }{ {5}^{18} }$

Step-by-step explanation:

${55}^{56} \times {5}^{22} \times {5}^{ - 96}$

$= {55}^{56} \times {5}^{ - 74}$

$= {11}^{56} \times {5}^{56} \times \frac{1}{ {5}^{74} }$

$= {11}^{56} \times \frac{1}{ {5}^{18} }$

$= \frac{ {11}^{56} }{ {5}^{18} }$

8 0

3 years ago

1 calculate the weight of a dog on the earth and on the moon if it has a mass of 28kg

Allisa [31]

To solve the problem.

W=m×g

W=28×10

W=280.

The weight of a dog on the surface of earth is 280N.

6 0

3 years ago

Read 2 more answers

What are the solution(s) to the quadratic equation 50 - x2 = 0?

jekas [21]

Answer:

x = $5\sqrt{2}$

Step-by-step explanation:

given, 50 - x^2 = 0

add x^2 to both sides, 50 = x^2

square root both sides, $\sqrt{50}\\$ = $\sqrt{x^{2} }$

simplify, 50 / 5 = 10 / 5 = 2

you have a pair of 5's, and a 2, $5\sqrt{2}$ = x

5 0

3 years ago