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skelet666 [1.2K]
1 year ago
10

Help pls........................

Mathematics
1 answer:
Alina [70]1 year ago
6 0

The difference of 2.5 x 10^{4} - 1.5 x 10³ is 2.35 x 10^{4}.

<h3>What is the difference?</h3>

Difference is the result of the subtraction of two or more numbers. The numbers are written in scientific notation. Scientific notation is a method that is used to write large numbers.

The exponent of the numbers have different value. In order to evaluate them, they have to have the same values.

2.5 x 10^{4} - 1.5 x 10³

2.5 x 10^{4} - 0.15 x 10^{4}

2.35 x 10^{4}

To learn more about scientific notation, please check: brainly.com/question/25334755

#SPJ1

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Jeff takes 5 hour longer to build a fence than it takes bill. when they work together, it takes them 6 hours. how long would it
kobusy [5.1K]
Best Answer: Bill's time to do the whole job, B
Jeff's time, B + 5
time they actually work, 6.

6/B + 6/(B+5) = 1
6(B+5) + 6B = B(B+5)
6B + 30 + 6B = B² + 5B
B² - 7B - 30 = 0
(B - 10)(B + 3) = 0
B = 10 or B = -3, and we reject the negative solution.

the equation is based on adding the fractions of the whole job each does. if Bill takes B hours to do the whole thing and works 6, he does 6/B of the job. similarly for Jeff.

in the 2nd problem,
a = time of experienced accountant
2a = time of new accountant
10 = time each actually works

10/a + 10/(2a) = 1 ........ multiply all by a
10 + 5 = a
a = 15 hr.
7 0
3 years ago
The sixth graders in one school are 155. 3 of them are girls. How many are the boys? 5
umka21 [38]

Answer:

31 i think

155.3 divided by 5 is equal to 31

6 0
3 years ago
Read 2 more answers
If the perimeter of the rectangle to the right is 96 ​inches, find the value of x
abruzzese [7]
You must have an illustration to give an idea what x represents. If not, then we can never find a way to answer this for you. However, for educational purposes, let me just suppose a figure for us to solve. The diagram is shown in the attached picture.

The rectangle has dimensions of 6 + x by x units, where x is the width and (6+x) is the length. If you are given the perimeter of the rectangle, then the working equation to be used is shown below.

Perimeter = 2L + 2W

Generally, perimeter is the sum of all sides of the figure. Since rectangle is defined to be made up of two sets of equal parallel sides called length and width, the perimeter is simplified to be that way. Substituting the values,

96 inches = 2(6+x) + 2x
96 = 12 + 2x + 2x
96 = 12 + 4x
4x = 96 - 12
4x = 84
x = 84/4
x = 21 inches

6 0
4 years ago
Can I get help with this?
Trava [24]

Answer:

arc AE = 125 deg

Step-by-step explanation:

As the property of angle at the center O of a circle:

angle AOE = arc AE

=> arc AE = 125 deg

Hope this helps!

6 0
3 years ago
PLEASE HELP!!!!!!!!!!!!!!!!!!!
Mamont248 [21]
It is -p... think about it.... two negative signs equal a positive sign, if there are an odd number of negative sign's the real answer is -p, and if there is an even amount, it means it is positive p. In your situation, there are 5 negative signs, so since 5 is an odd number, the p has to be negative.
5 0
4 years ago
Read 2 more answers
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