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sdas [7]
2 years ago
13

Jackie and a classmate spent a total of 20 hrs working on a chemistry project. Jackie’s classmate spent 2 hrs less time working

on the project than Jackie. How long did Jackie work on the project?
Mathematics
1 answer:
valina [46]2 years ago
7 0

Answer:

x = 11

Step-by-step explanation:

x + (x - 2) = 20

2x - 2 = 20

2x - 2 + 2 = 22 + 2

2x = 22

x = 11

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Answer:

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Write the number 0.000938 in scientific notion.
ss7ja [257]
<span>0.000938 in scientific notion.

First we need to move the decimal to its right and we need a number which is between 1-10. 

0.000938
00.00938
000.0938
0000.938
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We moved the decimal 4 times and to the right so it will be negative. -4.


9.38 </span>× 10^-4

Scientific notation of 0.000938 is 9.38 × 10^-4.

Check:-

9.38 × 10^-4 = <span>0.000938
</span>0.000938 = <span>0.000938
</span>Correct!

<span>Scientific notation of 0.000938 is 9.38 × 10^-4.</span>
6 0
3 years ago
The digits of a certain three-digit number are consecutive odd numbers. If the sum of the digits is 15, find the number.
scoray [572]
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3 0
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Tanya [424]

Answer:

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Step-by-step explanation:

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Add 3 to each side

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3 0
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What is 74 times 98 add 65?
vitfil [10]

Answer:

7317

Step-by-step explanation:

74x98+65=7317

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