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Rzqust [24]
3 years ago
14

Jack and Fred have to do a certain job. If Jack works alone he can finish the job in 3

Mathematics
1 answer:
RideAnS [48]3 years ago
6 0

Answer:

y = 6

Step-by-step explanation:

when they work together, you square the 3 and get 6

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When multiplying and dividing two numbers in scientific notation, why do u sometimes have to rewrite one factor ?
zalisa [80]

You sometimes need to rewrite a factor because the lead number is not between 1 and 10 as it needs to be in scientific notation. For instance, if we had lead numbers of 2 and 5, as we do in the following problem.

2x10^3 * 5x10^9

Then we get the answer of 10x10^12. We need to adjust this by moving the decimal place and increasing the exponent by 1. The correct answer would be 1x10^13 instead.

5 0
3 years ago
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Please help! <br> Express 35 marks out of 40 as a percentage.
Blizzard [7]

Answer:

\huge\boxed{\sf 87.5 \ \%}

Step-by-step explanation:

35 marks out of 40<u> as a fraction:</u>

35 / 40

<u>As a percentage:</u>

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Hope this helped!

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7 0
3 years ago
What is the answer to this equation: 40+40-20x0+3+125=
MrRa [10]

Answer:

208

Step-by-step explanation:

20 × 0 = 0

40 + 40 = 80

125 + 3 = 128

3 0
2 years ago
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This is my question it is kind of confusing but can you guys help me solve it thanks.
Anna35 [415]

Answer:

2.3h - 2.9d - 14

Step-by-step explanation:

6h - 3.7h - 7.9d + 5d - 14

= 2.3h - 2.9d - 14

5 0
3 years ago
Lawrence bought 2/3 pound of roast beef. He used 3/4 of it to make a sandwich. How much roast beef did Lawrence use for his sand
laila [671]
You multiply 3/4 by 2/3 it equals 2/4 which equals 1/2. The answer is 1/2.
3 0
3 years ago
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