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pav-90 [236]
3 years ago
12

A log is 20 m long, correct to the nearest metre.

Mathematics
1 answer:
Marat540 [252]3 years ago
4 0

Answer:

222 fence posts

Step-by-step explanation:

Since the log is 20 m long, correct to the nearest metre and has to be cut into fence posts which must be 90 cm long, correct  to the nearest 10 centimetres, there can be x fence posts 90 cm long.

So, we have x × 90 cm = 20 m

x × 0.9 m = 20 m

x = 20 m/0.9 m

x = 222.22

x ≅ 222 fence posts

So, the largest number of fence posts that can possibly be cut from the log is 222 fence posts.

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If a = -5, then 2a = -10<br> what is the property
Stolb23 [73]

Answer:

There would be no property because it doesn't form any conic sections.

Hope this helped :)

P.S. Are there answer choices?

6 0
3 years ago
Solve for x: x - 7 = -10<br><br> A.17<br> B. 3<br> C. -17<br> D. -3
ratelena [41]
B(3) because 3-7=-10
6 0
3 years ago
One person can do a certain job in 15 minutes and another person can do the same job in 30 minutes. How many minutes will it tak
Flauer [41]

Hello! Your answer is B, 10 minutes.

Say the x = minutes taken to do the job. You can set up an equation like this to solve this.

\frac{1}{15} x + \frac{1}{30} x = 1

This is representative of the situation. The fractions each represent <u>how much each person does in a minute</u>, and when they're multiplied by x, that's <u>how much of the project they get done</u> based off of the minutes they work together on the job. Add the two together, and you get <u>how much of the project is finished in x amount of time</u>. Set it equal to 1, as you are looking for 100% completion.

Once you have this equation, find a common denominator, add, and solve.

\frac{1}{15} x + \frac{1}{30} x = 1

\frac{2}{30} x + \frac{1}{30} x = 1

\frac{3}{30}x = 1

\frac{1}{10}x = 1

x = 10

Therefore, it will take them 10 minutes to do the job together.

Hope this helps!

8 0
3 years ago
Mark simplified three over five divided by five over eight.; his work is shown below. Identify where he made his error. Original
yulyashka [42]

Answer:

step 3

Step-by-step explanation:

3 x 8 = 24 thats correct but 5 x 5 = 25 not 5

i took the test

5 0
3 years ago
Read 2 more answers
What is the value of the expression (-8)(6) - (-4)(-5) + (-3)(-6)?
Vlad1618 [11]

-77 is the correct answer. Hope this helped. Comment if you would like a more detailed answer.

5 0
3 years ago
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